[PXB-2702] Backup fails when undo truncation log is present - Percona JIRA

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Type: Bug
Status: Done
Priority: Medium
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 8.0.30-23 (Q3 2022)
Component/s: None
Labels:
- onlineddl
Environment:
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MySQL version:

[DEV]root@myt-nza7ldt2gfco5nj6 ~ # /usr/sbin/mysqld --version /usr/sbin/mysqld Ver 8.0.25-15 for Linux on x86_64 (Percona Server (GPL), Revision 7df6366)

PXB version:

[DEV]root@myt-nza7ldt2gfco5nj6 ~ # /usr/bin/xtrabackup --version xtrabackup: recognized server arguments: --datadir=/var/lib/mysql --tmpdir=/var/lib/mysql/.tmp --innodb_page_size=16384 --innodb_buffer_pool_size=256M --innodb_file_per_table=1 --innodb_log_buffer_size=16777216 --innodb_log_file_size=268435456 --innodb_adaptive_hash_index=1 --innodb_use_native_aio=1 --innodb_flush_method=O_DIRECT --innodb_flush_log_at_trx_commit=1 --innodb_read_io_threads=4 --innodb_write_io_threads=4 --innodb_io_capacity=200 --server-id=4 --log_bin=mysql-bin-log-myt-nza7ldt2gfco5nj6-db-yandex-net --log-bin-index=/var/lib/mysql/mysql-bin-log.index /usr/bin/xtrabackup.bak version 8.0.25-17 based on MySQL server 8.0.25 Linux (x86_64) (revision id: a460572)

MySQL config

[DEV]root@myt-nza7ldt2gfco5nj6 ~ # mysql --port 3308 -e "SHOW GLOBAL VARIABLES" | cat Variable_name Value activate_all_roles_on_login OFF admin_address myt-nza7ldt2gfco5nj6.db.yandex.net admin_port 3308 admin_ssl_ca admin_ssl_capath admin_ssl_cert admin_ssl_cipher admin_ssl_crl admin_ssl_crlpath admin_ssl_key admin_tls_ciphersuites admin_tls_version TLSv1,TLSv1.1,TLSv1.2,TLSv1.3 auto_generate_certs ON auto_increment_increment 1 auto_increment_offset 1 autocommit ON automatic_sp_privileges ON avoid_temporal_upgrade OFF back_log 100 basedir /usr/ big_tables OFF bind_address * binlog_cache_size 32768 binlog_checksum CRC32 binlog_direct_non_transactional_updates OFF binlog_encryption OFF binlog_error_action ABORT_SERVER binlog_expire_logs_seconds 0 binlog_format ROW binlog_group_commit_sync_delay 0 binlog_group_commit_sync_no_delay_count 0 binlog_gtid_simple_recovery ON binlog_max_flush_queue_time 0 binlog_order_commits ON binlog_rotate_encryption_master_key_at_startup OFF binlog_row_event_max_size 8192 binlog_row_image FULL binlog_row_metadata MINIMAL binlog_row_value_options binlog_rows_query_log_events OFF binlog_skip_flush_commands OFF binlog_space_limit 0 binlog_stmt_cache_size 32768 binlog_transaction_compression OFF binlog_transaction_compression_level_zstd 3 binlog_transaction_dependency_history_size 25000 binlog_transaction_dependency_tracking COMMIT_ORDER block_encryption_mode aes-128-ecb bulk_insert_buffer_size 8388608 caching_sha2_password_auto_generate_rsa_keys ON caching_sha2_password_digest_rounds 5000 caching_sha2_password_private_key_path private_key.pem caching_sha2_password_public_key_path public_key.pem character_set_client utf8mb4 character_set_connection utf8mb4 character_set_database utf8mb4 character_set_filesystem binary character_set_results utf8mb4 character_set_server utf8mb4 character_set_system utf8mb3 character_sets_dir /usr/share/mysql/charsets/ check_proxy_users OFF collation_connection utf8mb4_0900_ai_ci collation_database utf8mb4_0900_ai_ci collation_server utf8mb4_0900_ai_ci completion_type NO_CHAIN concurrent_insert AUTO connect_timeout 10 core_file OFF create_admin_listener_thread OFF cte_max_recursion_depth 1000 datadir /var/lib/mysql/ default_authentication_plugin caching_sha2_password default_collation_for_utf8mb4 utf8mb4_0900_ai_ci default_password_lifetime 0 default_storage_engine InnoDB default_table_encryption OFF default_tmp_storage_engine InnoDB default_week_format 0 delay_key_write ON delayed_insert_limit 100 delayed_insert_timeout 300 delayed_queue_size 1000 disabled_storage_engines MyISAM,MRG_MyISAM,BLACKHOLE,FEDERATED,ARCHIVE,CSV,MEMORY disconnect_on_expired_password ON div_precision_increment 4 encrypt_tmp_files OFF end_markers_in_json OFF enforce_gtid_consistency ON enforce_storage_engine eq_range_index_dive_limit 200 event_scheduler ON expand_fast_index_creation OFF expire_logs_days 14 explicit_defaults_for_timestamp ON flush OFF flush_time 0 foreign_key_checks ON ft_boolean_syntax + -><()~*:""&| ft_max_word_len 84 ft_min_word_len 4 ft_query_expansion_limit 20 ft_query_extra_word_chars OFF ft_stopword_file (built-in) general_log OFF general_log_file /var/log/mysql/query.log generated_random_password_length 20 group_concat_max_len 1024 group_replication_consistency EVENTUAL gtid_executed 25ebb7f7-7e98-11ec-9280-d72946e4a590:1-4975574,\n5c957b7b-7e98-11ec-bfef-a66c2d9c85c8:1-33915889,\nb6784b10-7e98-11ec-8f56-da520d4c54c1:1-1479013 gtid_executed_compression_period 0 gtid_mode ON gtid_owned gtid_purged 25ebb7f7-7e98-11ec-9280-d72946e4a590:1-4975574,\n5c957b7b-7e98-11ec-bfef-a66c2d9c85c8:1-33257380,\nb6784b10-7e98-11ec-8f56-da520d4c54c1:1-1479013 have_backup_locks YES have_backup_safe_binlog_info YES have_compress YES have_dynamic_loading YES have_geometry YES have_openssl YES have_profiling YES have_query_cache NO have_rtree_keys YES have_snapshot_cloning YES have_ssl YES have_statement_timeout YES have_symlink DISABLED histogram_generation_max_mem_size 20000000 host_cache_size 228 hostname myt-nza7ldt2gfco5nj6.db.yandex.net information_schema_stats_expiry 86400 init_connect init_file init_slave innodb_adaptive_flushing ON innodb_adaptive_flushing_lwm 10 innodb_adaptive_hash_index ON innodb_adaptive_hash_index_parts 8 innodb_adaptive_max_sleep_delay 150000 innodb_api_bk_commit_interval 5 innodb_api_disable_rowlock OFF innodb_api_enable_binlog OFF innodb_api_enable_mdl OFF innodb_api_trx_level 0 innodb_autoextend_increment 64 innodb_autoinc_lock_mode 2 innodb_background_scrub_data_check_interval 3600 innodb_background_scrub_data_compressed OFF innodb_background_scrub_data_interval 604800 innodb_background_scrub_data_uncompressed OFF innodb_buffer_pool_chunk_size 33554432 innodb_buffer_pool_dump_at_shutdown ON innodb_buffer_pool_dump_now OFF innodb_buffer_pool_dump_pct 25 innodb_buffer_pool_filename ib_buffer_pool innodb_buffer_pool_in_core_file ON innodb_buffer_pool_instances 1 innodb_buffer_pool_load_abort OFF innodb_buffer_pool_load_at_startup ON innodb_buffer_pool_load_now OFF innodb_buffer_pool_size 268435456 innodb_change_buffer_max_size 25 innodb_change_buffering all innodb_checksum_algorithm crc32 innodb_cleaner_lsn_age_factor high_checkpoint innodb_cmp_per_index_enabled OFF innodb_commit_concurrency 0 innodb_compressed_columns_threshold 96 innodb_compressed_columns_zip_level 6 innodb_compression_failure_threshold_pct 5 innodb_compression_level 6 innodb_compression_pad_pct_max 50 innodb_concurrency_tickets 5000 innodb_corrupt_table_action assert innodb_data_file_path ibdata1:12M:autoextend innodb_data_home_dir innodb_deadlock_detect ON innodb_dedicated_server OFF innodb_default_encryption_key_id 0 innodb_default_row_format dynamic innodb_directories innodb_disable_sort_file_cache OFF innodb_doublewrite ON innodb_doublewrite_batch_size 0 innodb_doublewrite_dir innodb_doublewrite_files 2 innodb_doublewrite_pages 4 innodb_empty_free_list_algorithm legacy innodb_encrypt_online_alter_logs OFF innodb_encryption_rotate_key_age 1 innodb_encryption_rotation_iops 100 innodb_encryption_threads 0 innodb_extend_and_initialize ON innodb_fast_shutdown 1 innodb_file_per_table ON innodb_fill_factor 100 innodb_flush_log_at_timeout 1 innodb_flush_log_at_trx_commit 1 innodb_flush_method O_DIRECT innodb_flush_neighbors 0 innodb_flush_sync ON innodb_flushing_avg_loops 30 innodb_force_index_records_in_range 0 innodb_force_load_corrupted OFF innodb_force_recovery 0 innodb_fsync_threshold 0 innodb_ft_aux_table innodb_ft_cache_size 8000000 innodb_ft_enable_diag_print OFF innodb_ft_enable_stopword ON innodb_ft_ignore_stopwords OFF innodb_ft_max_token_size 84 innodb_ft_min_token_size 3 innodb_ft_num_word_optimize 2000 innodb_ft_result_cache_limit 2000000000 innodb_ft_server_stopword_table innodb_ft_sort_pll_degree 2 innodb_ft_total_cache_size 640000000 innodb_ft_user_stopword_table innodb_idle_flush_pct 100 innodb_immediate_scrub_data_uncompressed OFF innodb_io_capacity 200 innodb_io_capacity_max 2000 innodb_lock_wait_timeout 50 innodb_log_buffer_size 16777216 innodb_log_checksums ON innodb_log_compressed_pages ON innodb_log_file_size 268435456 innodb_log_files_in_group 2 innodb_log_group_home_dir ./ innodb_log_spin_cpu_abs_lwm 80 innodb_log_spin_cpu_pct_hwm 50 innodb_log_wait_for_flush_spin_hwm 400 innodb_log_write_ahead_size 8192 innodb_log_writer_threads ON innodb_lru_scan_depth 1024 innodb_max_bitmap_file_size 104857600 innodb_max_changed_pages 1000000 innodb_max_dirty_pages_pct 90.000000 innodb_max_dirty_pages_pct_lwm 10.000000 innodb_max_purge_lag 0 innodb_max_purge_lag_delay 0 innodb_max_undo_log_size 67108864 innodb_monitor_disable innodb_monitor_enable innodb_monitor_reset innodb_monitor_reset_all innodb_numa_interleave OFF innodb_old_blocks_pct 37 innodb_old_blocks_time 1000 innodb_online_alter_log_max_size 134217728 innodb_open_files 4000 innodb_optimize_fulltext_only OFF innodb_page_cleaners 1 innodb_page_size 16384 innodb_parallel_dblwr_encrypt OFF innodb_parallel_doublewrite_path xb_doublewrite innodb_parallel_read_threads 4 innodb_print_all_deadlocks OFF innodb_print_ddl_logs OFF innodb_print_lock_wait_timeout_info OFF innodb_purge_batch_size 300 innodb_purge_rseg_truncate_frequency 128 innodb_purge_threads 4 innodb_random_read_ahead OFF innodb_read_ahead_threshold 56 innodb_read_io_threads 4 innodb_read_only OFF innodb_records_in_range 0 innodb_redo_log_archive_dirs innodb_redo_log_encrypt OFF innodb_replication_delay 0 innodb_rollback_on_timeout OFF innodb_rollback_segments 128 innodb_scrub_log OFF innodb_scrub_log_speed 256 innodb_show_locks_held 10 innodb_sort_buffer_size 1048576 innodb_spin_wait_delay 6 innodb_spin_wait_pause_multiplier 50 innodb_stats_auto_recalc ON innodb_stats_include_delete_marked OFF innodb_stats_method nulls_equal innodb_stats_on_metadata OFF innodb_stats_persistent ON innodb_stats_persistent_sample_pages 20 innodb_stats_transient_sample_pages 8 innodb_status_output OFF innodb_status_output_locks OFF innodb_strict_mode ON innodb_sync_array_size 1 innodb_sync_spin_loops 30 innodb_sys_tablespace_encrypt OFF innodb_table_locks ON innodb_temp_data_file_path ibtmp1:12M:autoextend innodb_temp_tablespace_encrypt OFF innodb_temp_tablespaces_dir ./#innodb_temp/ innodb_thread_concurrency 0 innodb_thread_sleep_delay 10000 innodb_tmpdir innodb_track_changed_pages OFF innodb_undo_directory ./ innodb_undo_log_encrypt OFF innodb_undo_log_truncate ON innodb_undo_tablespaces 2 innodb_use_native_aio ON innodb_validate_tablespace_paths ON innodb_version 8.0.25-15 innodb_write_io_threads 4 interactive_timeout 28800 internal_tmp_mem_storage_engine TempTable jemalloc_detected OFF jemalloc_profiling OFF join_buffer_size 262144 keep_files_on_create OFF key_buffer_size 8388608 key_cache_age_threshold 300 key_cache_block_size 1024 key_cache_division_limit 100 keyring_operations ON kill_idle_transaction 0 large_files_support ON large_page_size 0 large_pages OFF lc_messages en_US lc_messages_dir /usr/share/mysql/ lc_time_names en_US license GPL local_infile ON lock_wait_timeout 31536000 locked_in_memory OFF log_bin ON log_bin_basename /var/lib/mysql/mysql-bin-log-myt-nza7ldt2gfco5nj6-db-yandex-net log_bin_index /var/lib/mysql/mysql-bin-log.index log_bin_trust_function_creators ON log_bin_use_v1_row_events OFF log_error /var/log/mysql/error.log log_error_services log_filter_internal; log_sink_internal log_error_suppression_list log_error_verbosity 3 log_output FILE log_queries_not_using_indexes OFF log_raw OFF log_slave_updates ON log_slow_admin_statements OFF log_slow_extra OFF log_slow_filter log_slow_rate_limit 1 log_slow_rate_type session log_slow_slave_statements OFF log_slow_sp_statements ON log_slow_verbosity microtime,query_plan,innodb log_statements_unsafe_for_binlog ON log_throttle_queries_not_using_indexes 0 log_timestamps SYSTEM long_query_time 10.000000 low_priority_updates OFF lower_case_file_system OFF lower_case_table_names 0 mandatory_roles master_info_repository TABLE master_verify_checksum OFF max_allowed_packet 16777216 max_binlog_cache_size 18446744073709547520 max_binlog_size 104857600 max_binlog_stmt_cache_size 18446744073709547520 max_connect_errors 4294967295 max_connections 100 max_delayed_threads 20 max_digest_length 1024 max_error_count 1024 max_execution_time 0 max_heap_table_size 16777216 max_insert_delayed_threads 20 max_join_size 18446744073709551615 max_length_for_sort_data 4096 max_points_in_geometry 65536 max_prepared_stmt_count 16382 max_relay_log_size 0 max_seeks_for_key 18446744073709551615 max_sort_length 1024 max_sp_recursion_depth 0 max_user_connections 0 max_write_lock_count 18446744073709551615 min_examined_row_limit 0 myisam_data_pointer_size 6 myisam_max_sort_file_size 9223372036853727232 myisam_mmap_size 18446744073709551615 myisam_recover_options OFF myisam_repair_threads 1 myisam_sort_buffer_size 8388608 myisam_stats_method nulls_unequal myisam_use_mmap OFF mysql_native_password_proxy_users OFF mysqlx_bind_address * mysqlx_compression_algorithms DEFLATE_STREAM,LZ4_MESSAGE,ZSTD_STREAM mysqlx_connect_timeout 30 mysqlx_deflate_default_compression_level 3 mysqlx_deflate_max_client_compression_level 5 mysqlx_document_id_unique_prefix 0 mysqlx_enable_hello_notice ON mysqlx_idle_worker_thread_timeout 60 mysqlx_interactive_timeout 28800 mysqlx_lz4_default_compression_level 2 mysqlx_lz4_max_client_compression_level 8 mysqlx_max_allowed_packet 67108864 mysqlx_max_connections 100 mysqlx_min_worker_threads 2 mysqlx_port 33060 mysqlx_port_open_timeout 0 mysqlx_read_timeout 30 mysqlx_socket /var/run/mysqld/mysqlx.sock mysqlx_ssl_ca mysqlx_ssl_capath mysqlx_ssl_cert mysqlx_ssl_cipher mysqlx_ssl_crl mysqlx_ssl_crlpath mysqlx_ssl_key mysqlx_wait_timeout 28800 mysqlx_write_timeout 60 mysqlx_zstd_default_compression_level 3 mysqlx_zstd_max_client_compression_level 11 net_buffer_length 16384 net_buffer_shrink_interval 0 net_read_timeout 30 net_retry_count 10 net_write_timeout 60 new OFF ngram_token_size 2 offline_mode ON old OFF old_alter_table OFF open_files_limit 262144 optimizer_prune_level 1 optimizer_search_depth 62 optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=on,index_condition_pushdown=on,mrr=on,mrr_cost_based=on,block_nested_loop=on,batched_key_access=off,materialization=on,semijoin=on,loosescan=on,firstmatch=on,duplicateweedout=on,subquery_materialization_cost_based=on,use_index_extensions=on,condition_fanout_filter=on,derived_merge=on,use_invisible_indexes=off,skip_scan=on,hash_join=on,subquery_to_derived=off,prefer_ordering_index=on,hypergraph_optimizer=off,derived_condition_pushdown=on,favor_range_scan=off optimizer_trace enabled=off,one_line=off optimizer_trace_features greedy_search=on,range_optimizer=on,dynamic_range=on,repeated_subselect=on optimizer_trace_limit 1 optimizer_trace_max_mem_size 1048576 optimizer_trace_offset -1 parser_max_mem_size 18446744073709551615 partial_revokes OFF password_history 0 password_require_current OFF password_reuse_interval 0 performance_schema ON performance_schema_accounts_size 200 performance_schema_digests_size 10000 performance_schema_error_size 0 performance_schema_events_stages_history_long_size 10000 performance_schema_events_stages_history_size 10 performance_schema_events_statements_history_long_size 10000 performance_schema_events_statements_history_size 10 performance_schema_events_transactions_history_long_size 10000 performance_schema_events_transactions_history_size 10 performance_schema_events_waits_history_long_size 10000 performance_schema_events_waits_history_size 10 performance_schema_hosts_size 200 performance_schema_max_cond_classes 100 performance_schema_max_cond_instances -1 performance_schema_max_digest_length 1024 performance_schema_max_digest_sample_age 60 performance_schema_max_file_classes 80 performance_schema_max_file_handles 32768 performance_schema_max_file_instances -1 performance_schema_max_index_stat -1 performance_schema_max_memory_classes 530 performance_schema_max_metadata_locks -1 performance_schema_max_mutex_classes 340 performance_schema_max_mutex_instances -1 performance_schema_max_prepared_statements_instances -1 performance_schema_max_program_instances -1 performance_schema_max_rwlock_classes 70 performance_schema_max_rwlock_instances -1 performance_schema_max_socket_classes 10 performance_schema_max_socket_instances -1 performance_schema_max_sql_text_length 1024 performance_schema_max_stage_classes 200 performance_schema_max_statement_classes 226 performance_schema_max_statement_stack 10 performance_schema_max_table_handles -1 performance_schema_max_table_instances -1 performance_schema_max_table_lock_stat -1 performance_schema_max_thread_classes 100 performance_schema_max_thread_instances -1 performance_schema_session_connect_attrs_size 512 performance_schema_setup_actors_size -1 performance_schema_setup_objects_size -1 performance_schema_show_processlist OFF performance_schema_users_size -1 persist_only_admin_x509_subject persisted_globals_load ON pid_file /var/run/mysqld/mysqld.pid plugin_dir /usr/lib/mysql/plugin/ port 3306 preload_buffer_size 32768 print_identified_with_as_hex OFF profiling OFF profiling_history_size 15 protocol_compression_algorithms zlib,zstd,uncompressed protocol_version 10 proxy_protocol_networks query_alloc_block_size 8192 query_prealloc_size 8192 range_alloc_block_size 4096 range_optimizer_max_mem_size 8388608 rbr_exec_mode STRICT read_buffer_size 131072 read_only ON read_rnd_buffer_size 262144 regexp_stack_limit 8000000 regexp_time_limit 32 relay_log mysql-relay-log-myt-nza7ldt2gfco5nj6-db-yandex-net relay_log_basename /var/lib/mysql/mysql-relay-log-myt-nza7ldt2gfco5nj6-db-yandex-net relay_log_index /var/lib/mysql/mysql-relay-log.index relay_log_info_file relay-log.info relay_log_info_repository TABLE relay_log_purge ON relay_log_recovery ON relay_log_space_limit 0 replication_optimize_for_static_plugin_config OFF replication_sender_observe_commit_only OFF report_host myt-nza7ldt2gfco5nj6.db.yandex.net report_password report_port 3306 report_user require_secure_transport OFF rpl_read_size 8192 rpl_semi_sync_master_enabled OFF rpl_semi_sync_master_timeout 31536000000 rpl_semi_sync_master_trace_level 32 rpl_semi_sync_master_wait_for_slave_count 1 rpl_semi_sync_master_wait_no_slave ON rpl_semi_sync_master_wait_point AFTER_SYNC rpl_semi_sync_slave_enabled OFF rpl_semi_sync_slave_trace_level 32 rpl_stop_slave_timeout 31536000 schema_definition_cache 256 secondary_engine_cost_threshold 100000.000000 secure_file_priv NULL select_into_buffer_size 131072 select_into_disk_sync OFF select_into_disk_sync_delay 0 server_id 4 server_id_bits 32 server_uuid f151da26-7f7b-11ec-a0b3-566c1d4d2df6 session_track_gtids OFF session_track_schema ON session_track_state_change OFF session_track_system_variables time_zone,autocommit,character_set_client,character_set_results,character_set_connection session_track_transaction_info OFF sha256_password_auto_generate_rsa_keys ON sha256_password_private_key_path private_key.pem sha256_password_proxy_users OFF sha256_password_public_key_path public_key.pem show_create_table_verbosity OFF show_old_temporals OFF skip_external_locking ON skip_name_resolve OFF skip_networking OFF skip_show_database OFF skip_slave_start OFF slave_allow_batching OFF slave_checkpoint_group 512 slave_checkpoint_period 300 slave_compressed_protocol OFF slave_exec_mode STRICT slave_load_tmpdir /var/lib/mysql/.tmp slave_max_allowed_packet 1073741824 slave_net_timeout 60 slave_parallel_type DATABASE slave_parallel_workers 0 slave_pending_jobs_size_max 134217728 slave_preserve_commit_order OFF slave_rows_search_algorithms INDEX_SCAN,HASH_SCAN slave_skip_errors OFF slave_sql_verify_checksum ON slave_transaction_retries 256 slave_type_conversions slow_launch_time 2 slow_query_log OFF slow_query_log_always_write_time 10.000000 slow_query_log_file /var/log/mysql/slow-query.log slow_query_log_use_global_control log_slow_filter,log_slow_rate_limit,log_slow_verbosity,long_query_time,min_examined_row_limit socket /var/run/mysqld/mysqld.sock sort_buffer_size 262144 sql_auto_is_null OFF sql_big_selects ON sql_buffer_result OFF sql_log_off OFF sql_mode ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION sql_notes ON sql_quote_show_create ON sql_require_primary_key OFF sql_safe_updates OFF sql_select_limit 18446744073709551615 sql_slave_skip_counter 0 sql_warnings OFF ssl_ca /etc/mysql/ssl/allCAs.pem ssl_capath ssl_cert /etc/mysql/ssl/server.crt ssl_cipher ssl_crl ssl_crlpath ssl_fips_mode OFF ssl_key /etc/mysql/ssl/server.key stored_program_cache 256 stored_program_definition_cache 256 super_read_only ON sync_binlog 1 sync_master_info 10000 sync_relay_log 10000 sync_relay_log_info 10000 system_time_zone MSK table_definition_cache 2000 table_encryption_privilege_check OFF table_open_cache 4000 table_open_cache_instances 16 tablespace_definition_cache 256 temptable_max_mmap 1073741824 temptable_max_ram 1073741824 temptable_use_mmap ON tf_sequence_table_max_upper_bound 1048576 thread_cache_size 10 thread_handling one-thread-per-connection thread_pool_high_prio_mode transactions thread_pool_high_prio_tickets 4294967295 thread_pool_idle_timeout 60 thread_pool_max_threads 100000 thread_pool_oversubscribe 3 thread_pool_size 32 thread_pool_stall_limit 500 thread_stack 196608 thread_statistics OFF time_zone Europe/Moscow tls_ciphersuites tls_version TLSv1,TLSv1.1,TLSv1.2,TLSv1.3 tmp_table_size 16777216 tmpdir /var/lib/mysql/.tmp transaction_alloc_block_size 8192 transaction_isolation REPEATABLE-READ transaction_prealloc_size 4096 transaction_read_only OFF transaction_write_set_extraction XXHASH64 unique_checks ON updatable_views_with_limit YES userstat OFF version 8.0.25-15 version_comment Percona Server (GPL), Revision 7df6366 version_compile_machine x86_64 version_compile_os Linux version_compile_zlib 1.2.11 version_suffix wait_timeout 28800 windowing_use_high_precision ON
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MySQL version: [DEV]root@myt-nza7ldt2gfco5nj6 ~ # /usr/sbin/mysqld --version /usr/sbin/mysqld Ver 8.0.25-15 for Linux on x86_64 (Percona Server (GPL), Revision 7df6366) PXB version: [DEV]root@myt-nza7ldt2gfco5nj6 ~ # /usr/bin/xtrabackup --version xtrabackup: recognized server arguments: --datadir=/ var /lib/mysql --tmpdir=/ var /lib/mysql/.tmp --innodb_page_size=16384 --innodb_buffer_pool_size=256M --innodb_file_per_table=1 --innodb_log_buffer_size=16777216 --innodb_log_file_size=268435456 --innodb_adaptive_hash_index=1 --innodb_use_native_aio=1 --innodb_flush_method=O_DIRECT --innodb_flush_log_at_trx_commit=1 --innodb_read_io_threads=4 --innodb_write_io_threads=4 --innodb_io_capacity=200 --server-id=4 --log_bin=mysql-bin-log-myt-nza7ldt2gfco5nj6-db-yandex-net --log-bin-index=/ var /lib/mysql/mysql-bin-log.index /usr/bin/xtrabackup.bak version 8.0.25-17 based on MySQL server 8.0.25 Linux (x86_64) (revision id: a460572) MySQL config [DEV]root@myt-nza7ldt2gfco5nj6 ~ # mysql --port 3308 -e "SHOW GLOBAL VARIABLES" | cat Variable_name Value activate_all_roles_on_login OFF admin_address myt-nza7ldt2gfco5nj6.db.yandex.net admin_port 3308 admin_ssl_ca admin_ssl_capath admin_ssl_cert admin_ssl_cipher admin_ssl_crl admin_ssl_crlpath admin_ssl_key admin_tls_ciphersuites admin_tls_version TLSv1,TLSv1.1,TLSv1.2,TLSv1.3 auto_generate_certs ON auto_increment_increment 1 auto_increment_offset 1 autocommit ON automatic_sp_privileges ON avoid_temporal_upgrade OFF back_log 100 basedir /usr/ big_tables OFF bind_address * binlog_cache_size 32768 binlog_checksum CRC32 binlog_direct_non_transactional_updates OFF binlog_encryption OFF binlog_error_action ABORT_SERVER binlog_expire_logs_seconds 0 binlog_format ROW binlog_group_commit_sync_delay 0 binlog_group_commit_sync_no_delay_count 0 binlog_gtid_simple_recovery ON binlog_max_flush_queue_time 0 binlog_order_commits ON binlog_rotate_encryption_master_key_at_startup OFF binlog_row_event_max_size 8192 binlog_row_image FULL binlog_row_metadata MINIMAL binlog_row_value_options binlog_rows_query_log_events OFF binlog_skip_flush_commands OFF binlog_space_limit 0 binlog_stmt_cache_size 32768 binlog_transaction_compression OFF binlog_transaction_compression_level_zstd 3 binlog_transaction_dependency_history_size 25000 binlog_transaction_dependency_tracking COMMIT_ORDER block_encryption_mode aes-128-ecb bulk_insert_buffer_size 8388608 caching_sha2_password_auto_generate_rsa_keys ON caching_sha2_password_digest_rounds 5000 caching_sha2_password_private_key_path private_key.pem caching_sha2_password_public_key_path public_key.pem character_set_client utf8mb4 character_set_connection utf8mb4 character_set_database utf8mb4 character_set_filesystem binary character_set_results utf8mb4 character_set_server utf8mb4 character_set_system utf8mb3 character_sets_dir /usr/share/mysql/charsets/ check_proxy_users OFF collation_connection utf8mb4_0900_ai_ci collation_database utf8mb4_0900_ai_ci collation_server utf8mb4_0900_ai_ci completion_type NO_CHAIN concurrent_insert AUTO connect_timeout 10 core_file OFF create_admin_listener_thread OFF cte_max_recursion_depth 1000 datadir / var /lib/mysql/ default_authentication_plugin caching_sha2_password default_collation_for_utf8mb4 utf8mb4_0900_ai_ci default_password_lifetime 0 default_storage_engine InnoDB default_table_encryption OFF default_tmp_storage_engine InnoDB default_week_format 0 delay_key_write ON delayed_insert_limit 100 delayed_insert_timeout 300 delayed_queue_size 1000 disabled_storage_engines MyISAM,MRG_MyISAM,BLACKHOLE,FEDERATED,ARCHIVE,CSV,MEMORY disconnect_on_expired_password ON div_precision_increment 4 encrypt_tmp_files OFF end_markers_in_json OFF enforce_gtid_consistency ON enforce_storage_engine eq_range_index_dive_limit 200 event_scheduler ON expand_fast_index_creation OFF expire_logs_days 14 explicit_defaults_for_timestamp ON flush OFF flush_time 0 foreign_key_checks ON ft_boolean_syntax + -><()~*:""&| ft_max_word_len 84 ft_min_word_len 4 ft_query_expansion_limit 20 ft_query_extra_word_chars OFF ft_stopword_file (built-in) general_log OFF general_log_file / var /log/mysql/query.log generated_random_password_length 20 group_concat_max_len 1024 group_replication_consistency EVENTUAL gtid_executed 25ebb7f7-7e98-11ec-9280-d72946e4a590:1-4975574,\n5c957b7b-7e98-11ec-bfef-a66c2d9c85c8:1-33915889,\nb6784b10-7e98-11ec-8f56-da520d4c54c1:1-1479013 gtid_executed_compression_period 0 gtid_mode ON gtid_owned gtid_purged 25ebb7f7-7e98-11ec-9280-d72946e4a590:1-4975574,\n5c957b7b-7e98-11ec-bfef-a66c2d9c85c8:1-33257380,\nb6784b10-7e98-11ec-8f56-da520d4c54c1:1-1479013 have_backup_locks YES have_backup_safe_binlog_info YES have_compress YES have_dynamic_loading YES have_geometry YES have_openssl YES have_profiling YES have_query_cache NO have_rtree_keys YES have_snapshot_cloning YES have_ssl YES have_statement_timeout YES have_symlink DISABLED histogram_generation_max_mem_size 20000000 host_cache_size 228 hostname myt-nza7ldt2gfco5nj6.db.yandex.net information_schema_stats_expiry 86400 init_connect init_file init_slave innodb_adaptive_flushing ON innodb_adaptive_flushing_lwm 10 innodb_adaptive_hash_index ON innodb_adaptive_hash_index_parts 8 innodb_adaptive_max_sleep_delay 150000 innodb_api_bk_commit_interval 5 innodb_api_disable_rowlock OFF innodb_api_enable_binlog OFF innodb_api_enable_mdl OFF innodb_api_trx_level 0 innodb_autoextend_increment 64 innodb_autoinc_lock_mode 2 innodb_background_scrub_data_check_interval 3600 innodb_background_scrub_data_compressed OFF innodb_background_scrub_data_interval 604800 innodb_background_scrub_data_uncompressed OFF innodb_buffer_pool_chunk_size 33554432 innodb_buffer_pool_dump_at_shutdown ON innodb_buffer_pool_dump_now OFF innodb_buffer_pool_dump_pct 25 innodb_buffer_pool_filename ib_buffer_pool innodb_buffer_pool_in_core_file ON innodb_buffer_pool_instances 1 innodb_buffer_pool_load_abort OFF innodb_buffer_pool_load_at_startup ON innodb_buffer_pool_load_now OFF innodb_buffer_pool_size 268435456 innodb_change_buffer_max_size 25 innodb_change_buffering all innodb_checksum_algorithm crc32 innodb_cleaner_lsn_age_factor high_checkpoint innodb_cmp_per_index_enabled OFF innodb_commit_concurrency 0 innodb_compressed_columns_threshold 96 innodb_compressed_columns_zip_level 6 innodb_compression_failure_threshold_pct 5 innodb_compression_level 6 innodb_compression_pad_pct_max 50 innodb_concurrency_tickets 5000 innodb_corrupt_table_action assert innodb_data_file_path ibdata1:12M:autoextend innodb_data_home_dir innodb_deadlock_detect ON innodb_dedicated_server OFF innodb_default_encryption_key_id 0 innodb_default_row_format dynamic innodb_directories innodb_disable_sort_file_cache OFF innodb_doublewrite ON innodb_doublewrite_batch_size 0 innodb_doublewrite_dir innodb_doublewrite_files 2 innodb_doublewrite_pages 4 innodb_empty_free_list_algorithm legacy innodb_encrypt_online_alter_logs OFF innodb_encryption_rotate_key_age 1 innodb_encryption_rotation_iops 100 innodb_encryption_threads 0 innodb_extend_and_initialize ON innodb_fast_shutdown 1 innodb_file_per_table ON innodb_fill_factor 100 innodb_flush_log_at_timeout 1 innodb_flush_log_at_trx_commit 1 innodb_flush_method O_DIRECT innodb_flush_neighbors 0 innodb_flush_sync ON innodb_flushing_avg_loops 30 innodb_force_index_records_in_range 0 innodb_force_load_corrupted OFF innodb_force_recovery 0 innodb_fsync_threshold 0 innodb_ft_aux_table innodb_ft_cache_size 8000000 innodb_ft_enable_diag_print OFF innodb_ft_enable_stopword ON innodb_ft_ignore_stopwords OFF innodb_ft_max_token_size 84 innodb_ft_min_token_size 3 innodb_ft_num_word_optimize 2000 innodb_ft_result_cache_limit 2000000000 innodb_ft_server_stopword_table innodb_ft_sort_pll_degree 2 innodb_ft_total_cache_size 640000000 innodb_ft_user_stopword_table innodb_idle_flush_pct 100 innodb_immediate_scrub_data_uncompressed OFF innodb_io_capacity 200 innodb_io_capacity_max 2000 innodb_lock_wait_timeout 50 innodb_log_buffer_size 16777216 innodb_log_checksums ON innodb_log_compressed_pages ON innodb_log_file_size 268435456 innodb_log_files_in_group 2 innodb_log_group_home_dir ./ innodb_log_spin_cpu_abs_lwm 80 innodb_log_spin_cpu_pct_hwm 50 innodb_log_wait_for_flush_spin_hwm 400 innodb_log_write_ahead_size 8192 innodb_log_writer_threads ON innodb_lru_scan_depth 1024 innodb_max_bitmap_file_size 104857600 innodb_max_changed_pages 1000000 innodb_max_dirty_pages_pct 90.000000 innodb_max_dirty_pages_pct_lwm 10.000000 innodb_max_purge_lag 0 innodb_max_purge_lag_delay 0 innodb_max_undo_log_size 67108864 innodb_monitor_disable innodb_monitor_enable innodb_monitor_reset innodb_monitor_reset_all innodb_numa_interleave OFF innodb_old_blocks_pct 37 innodb_old_blocks_time 1000 innodb_online_alter_log_max_size 134217728 innodb_open_files 4000 innodb_optimize_fulltext_only OFF innodb_page_cleaners 1 innodb_page_size 16384 innodb_parallel_dblwr_encrypt OFF innodb_parallel_doublewrite_path xb_doublewrite innodb_parallel_read_threads 4 innodb_print_all_deadlocks OFF innodb_print_ddl_logs OFF innodb_print_lock_wait_timeout_info OFF innodb_purge_batch_size 300 innodb_purge_rseg_truncate_frequency 128 innodb_purge_threads 4 innodb_random_read_ahead OFF innodb_read_ahead_threshold 56 innodb_read_io_threads 4 innodb_read_only OFF innodb_records_in_range 0 innodb_redo_log_archive_dirs innodb_redo_log_encrypt OFF innodb_replication_delay 0 innodb_rollback_on_timeout OFF innodb_rollback_segments 128 innodb_scrub_log OFF innodb_scrub_log_speed 256 innodb_show_locks_held 10 innodb_sort_buffer_size 1048576 innodb_spin_wait_delay 6 innodb_spin_wait_pause_multiplier 50 innodb_stats_auto_recalc ON innodb_stats_include_delete_marked OFF innodb_stats_method nulls_equal innodb_stats_on_metadata OFF innodb_stats_persistent ON innodb_stats_persistent_sample_pages 20 innodb_stats_transient_sample_pages 8 innodb_status_output OFF innodb_status_output_locks OFF innodb_strict_mode ON innodb_sync_array_size 1 innodb_sync_spin_loops 30 innodb_sys_tablespace_encrypt OFF innodb_table_locks ON innodb_temp_data_file_path ibtmp1:12M:autoextend innodb_temp_tablespace_encrypt OFF innodb_temp_tablespaces_dir ./#innodb_temp/ innodb_thread_concurrency 0 innodb_thread_sleep_delay 10000 innodb_tmpdir innodb_track_changed_pages OFF innodb_undo_directory ./ innodb_undo_log_encrypt OFF innodb_undo_log_truncate ON innodb_undo_tablespaces 2 innodb_use_native_aio ON innodb_validate_tablespace_paths ON innodb_version 8.0.25-15 innodb_write_io_threads 4 interactive_timeout 28800 internal_tmp_mem_storage_engine TempTable jemalloc_detected OFF jemalloc_profiling OFF join_buffer_size 262144 keep_files_on_create OFF key_buffer_size 8388608 key_cache_age_threshold 300 key_cache_block_size 1024 key_cache_division_limit 100 keyring_operations ON kill_idle_transaction 0 large_files_support ON large_page_size 0 large_pages OFF lc_messages en_US lc_messages_dir /usr/share/mysql/ lc_time_names en_US license GPL local_infile ON lock_wait_timeout 31536000 locked_in_memory OFF log_bin ON log_bin_basename / var /lib/mysql/mysql-bin-log-myt-nza7ldt2gfco5nj6-db-yandex-net log_bin_index / var /lib/mysql/mysql-bin-log.index log_bin_trust_function_creators ON log_bin_use_v1_row_events OFF log_error / var /log/mysql/error.log log_error_services log_filter_internal; log_sink_internal log_error_suppression_list log_error_verbosity 3 log_output FILE log_queries_not_using_indexes OFF log_raw OFF log_slave_updates ON log_slow_admin_statements OFF log_slow_extra OFF log_slow_filter log_slow_rate_limit 1 log_slow_rate_type session log_slow_slave_statements OFF log_slow_sp_statements ON log_slow_verbosity microtime,query_plan,innodb log_statements_unsafe_for_binlog ON log_throttle_queries_not_using_indexes 0 log_timestamps SYSTEM long_query_time 10.000000 low_priority_updates OFF lower_case_file_system OFF lower_case_table_names 0 mandatory_roles master_info_repository TABLE master_verify_checksum OFF max_allowed_packet 16777216 max_binlog_cache_size 18446744073709547520 max_binlog_size 104857600 max_binlog_stmt_cache_size 18446744073709547520 max_connect_errors 4294967295 max_connections 100 max_delayed_threads 20 max_digest_length 1024 max_error_count 1024 max_execution_time 0 max_heap_table_size 16777216 max_insert_delayed_threads 20 max_join_size 18446744073709551615 max_length_for_sort_data 4096 max_points_in_geometry 65536 max_prepared_stmt_count 16382 max_relay_log_size 0 max_seeks_for_key 18446744073709551615 max_sort_length 1024 max_sp_recursion_depth 0 max_user_connections 0 max_write_lock_count 18446744073709551615 min_examined_row_limit 0 myisam_data_pointer_size 6 myisam_max_sort_file_size 9223372036853727232 myisam_mmap_size 18446744073709551615 myisam_recover_options OFF myisam_repair_threads 1 myisam_sort_buffer_size 8388608 myisam_stats_method nulls_unequal myisam_use_mmap OFF mysql_native_password_proxy_users OFF mysqlx_bind_address * mysqlx_compression_algorithms DEFLATE_STREAM,LZ4_MESSAGE,ZSTD_STREAM mysqlx_connect_timeout 30 mysqlx_deflate_default_compression_level 3 mysqlx_deflate_max_client_compression_level 5 mysqlx_document_id_unique_prefix 0 mysqlx_enable_hello_notice ON mysqlx_idle_worker_thread_timeout 60 mysqlx_interactive_timeout 28800 mysqlx_lz4_default_compression_level 2 mysqlx_lz4_max_client_compression_level 8 mysqlx_max_allowed_packet 67108864 mysqlx_max_connections 100 mysqlx_min_worker_threads 2 mysqlx_port 33060 mysqlx_port_open_timeout 0 mysqlx_read_timeout 30 mysqlx_socket / var /run/mysqld/mysqlx.sock mysqlx_ssl_ca mysqlx_ssl_capath mysqlx_ssl_cert mysqlx_ssl_cipher mysqlx_ssl_crl mysqlx_ssl_crlpath mysqlx_ssl_key mysqlx_wait_timeout 28800 mysqlx_write_timeout 60 mysqlx_zstd_default_compression_level 3 mysqlx_zstd_max_client_compression_level 11 net_buffer_length 16384 net_buffer_shrink_interval 0 net_read_timeout 30 net_retry_count 10 net_write_timeout 60 new OFF ngram_token_size 2 offline_mode ON old OFF old_alter_table OFF open_files_limit 262144 optimizer_prune_level 1 optimizer_search_depth 62 optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=on,index_condition_pushdown=on,mrr=on,mrr_cost_based=on,block_nested_loop=on,batched_key_access=off,materialization=on,semijoin=on,loosescan=on,firstmatch=on,duplicateweedout=on,subquery_materialization_cost_based=on,use_index_extensions=on,condition_fanout_filter=on,derived_merge=on,use_invisible_indexes=off,skip_scan=on,hash_join=on,subquery_to_derived=off,prefer_ordering_index=on,hypergraph_optimizer=off,derived_condition_pushdown=on,favor_range_scan=off optimizer_trace enabled=off,one_line=off optimizer_trace_features greedy_search=on,range_optimizer=on,dynamic_range=on,repeated_subselect=on optimizer_trace_limit 1 optimizer_trace_max_mem_size 1048576 optimizer_trace_offset -1 parser_max_mem_size 18446744073709551615 partial_revokes OFF password_history 0 password_require_current OFF password_reuse_interval 0 performance_schema ON performance_schema_accounts_size 200 performance_schema_digests_size 10000 performance_schema_error_size 0 performance_schema_events_stages_history_long_size 10000 performance_schema_events_stages_history_size 10 performance_schema_events_statements_history_long_size 10000 performance_schema_events_statements_history_size 10 performance_schema_events_transactions_history_long_size 10000 performance_schema_events_transactions_history_size 10 performance_schema_events_waits_history_long_size 10000 performance_schema_events_waits_history_size 10 performance_schema_hosts_size 200 performance_schema_max_cond_classes 100 performance_schema_max_cond_instances -1 performance_schema_max_digest_length 1024 performance_schema_max_digest_sample_age 60 performance_schema_max_file_classes 80 performance_schema_max_file_handles 32768 performance_schema_max_file_instances -1 performance_schema_max_index_stat -1 performance_schema_max_memory_classes 530 performance_schema_max_metadata_locks -1 performance_schema_max_mutex_classes 340 performance_schema_max_mutex_instances -1 performance_schema_max_prepared_statements_instances -1 performance_schema_max_program_instances -1 performance_schema_max_rwlock_classes 70 performance_schema_max_rwlock_instances -1 performance_schema_max_socket_classes 10 performance_schema_max_socket_instances -1 performance_schema_max_sql_text_length 1024 performance_schema_max_stage_classes 200 performance_schema_max_statement_classes 226 performance_schema_max_statement_stack 10 performance_schema_max_table_handles -1 performance_schema_max_table_instances -1 performance_schema_max_table_lock_stat -1 performance_schema_max_thread_classes 100 performance_schema_max_thread_instances -1 performance_schema_session_connect_attrs_size 512 performance_schema_setup_actors_size -1 performance_schema_setup_objects_size -1 performance_schema_show_processlist OFF performance_schema_users_size -1 persist_only_admin_x509_subject persisted_globals_load ON pid_file / var /run/mysqld/mysqld.pid plugin_dir /usr/lib/mysql/plugin/ port 3306 preload_buffer_size 32768 print_identified_with_as_hex OFF profiling OFF profiling_history_size 15 protocol_compression_algorithms zlib,zstd,uncompressed protocol_version 10 proxy_protocol_networks query_alloc_block_size 8192 query_prealloc_size 8192 range_alloc_block_size 4096 range_optimizer_max_mem_size 8388608 rbr_exec_mode STRICT read_buffer_size 131072 read_only ON read_rnd_buffer_size 262144 regexp_stack_limit 8000000 regexp_time_limit 32 relay_log mysql-relay-log-myt-nza7ldt2gfco5nj6-db-yandex-net relay_log_basename / var /lib/mysql/mysql-relay-log-myt-nza7ldt2gfco5nj6-db-yandex-net relay_log_index / var /lib/mysql/mysql-relay-log.index relay_log_info_file relay-log.info relay_log_info_repository TABLE relay_log_purge ON relay_log_recovery ON relay_log_space_limit 0 replication_optimize_for_static_plugin_config OFF replication_sender_observe_commit_only OFF report_host myt-nza7ldt2gfco5nj6.db.yandex.net report_password report_port 3306 report_user require_secure_transport OFF rpl_read_size 8192 rpl_semi_sync_master_enabled OFF rpl_semi_sync_master_timeout 31536000000 rpl_semi_sync_master_trace_level 32 rpl_semi_sync_master_wait_for_slave_count 1 rpl_semi_sync_master_wait_no_slave ON rpl_semi_sync_master_wait_point AFTER_SYNC rpl_semi_sync_slave_enabled OFF rpl_semi_sync_slave_trace_level 32 rpl_stop_slave_timeout 31536000 schema_definition_cache 256 secondary_engine_cost_threshold 100000.000000 secure_file_priv NULL select_into_buffer_size 131072 select_into_disk_sync OFF select_into_disk_sync_delay 0 server_id 4 server_id_bits 32 server_uuid f151da26-7f7b-11ec-a0b3-566c1d4d2df6 session_track_gtids OFF session_track_schema ON session_track_state_change OFF session_track_system_variables time_zone,autocommit,character_set_client,character_set_results,character_set_connection session_track_transaction_info OFF sha256_password_auto_generate_rsa_keys ON sha256_password_private_key_path private_key.pem sha256_password_proxy_users OFF sha256_password_public_key_path public_key.pem show_create_table_verbosity OFF show_old_temporals OFF skip_external_locking ON skip_name_resolve OFF skip_networking OFF skip_show_database OFF skip_slave_start OFF slave_allow_batching OFF slave_checkpoint_group 512 slave_checkpoint_period 300 slave_compressed_protocol OFF slave_exec_mode STRICT slave_load_tmpdir / var /lib/mysql/.tmp slave_max_allowed_packet 1073741824 slave_net_timeout 60 slave_parallel_type DATABASE slave_parallel_workers 0 slave_pending_jobs_size_max 134217728 slave_preserve_commit_order OFF slave_rows_search_algorithms INDEX_SCAN,HASH_SCAN slave_skip_errors OFF slave_sql_verify_checksum ON slave_transaction_retries 256 slave_type_conversions slow_launch_time 2 slow_query_log OFF slow_query_log_always_write_time 10.000000 slow_query_log_file / var /log/mysql/slow-query.log slow_query_log_use_global_control log_slow_filter,log_slow_rate_limit,log_slow_verbosity,long_query_time,min_examined_row_limit socket / var /run/mysqld/mysqld.sock sort_buffer_size 262144 sql_auto_is_null OFF sql_big_selects ON sql_buffer_result OFF sql_log_off OFF sql_mode ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION sql_notes ON sql_quote_show_create ON sql_require_primary_key OFF sql_safe_updates OFF sql_select_limit 18446744073709551615 sql_slave_skip_counter 0 sql_warnings OFF ssl_ca /etc/mysql/ssl/allCAs.pem ssl_capath ssl_cert /etc/mysql/ssl/server.crt ssl_cipher ssl_crl ssl_crlpath ssl_fips_mode OFF ssl_key /etc/mysql/ssl/server.key stored_program_cache 256 stored_program_definition_cache 256 super_read_only ON sync_binlog 1 sync_master_info 10000 sync_relay_log 10000 sync_relay_log_info 10000 system_time_zone MSK table_definition_cache 2000 table_encryption_privilege_check OFF table_open_cache 4000 table_open_cache_instances 16 tablespace_definition_cache 256 temptable_max_mmap 1073741824 temptable_max_ram 1073741824 temptable_use_mmap ON tf_sequence_table_max_upper_bound 1048576 thread_cache_size 10 thread_handling one-thread-per-connection thread_pool_high_prio_mode transactions thread_pool_high_prio_tickets 4294967295 thread_pool_idle_timeout 60 thread_pool_max_threads 100000 thread_pool_oversubscribe 3 thread_pool_size 32 thread_pool_stall_limit 500 thread_stack 196608 thread_statistics OFF time_zone Europe/Moscow tls_ciphersuites tls_version TLSv1,TLSv1.1,TLSv1.2,TLSv1.3 tmp_table_size 16777216 tmpdir / var /lib/mysql/.tmp transaction_alloc_block_size 8192 transaction_isolation REPEATABLE-READ transaction_prealloc_size 4096 transaction_read_only OFF transaction_write_set_extraction XXHASH64 unique_checks ON updatable_views_with_limit YES userstat OFF version 8.0.25-15 version_comment Percona Server (GPL), Revision 7df6366 version_compile_machine x86_64 version_compile_os Linux version_compile_zlib 1.2.11 version_suffix wait_timeout 28800 windowing_use_high_precision ON

Needs Deploy:
Yes

Description

We use standard MySQL primary => secondary replication schema.
MySQL secondary instance is running with --super-read-only flag.
MySQL secondary instance is used for long queries, thus have big undo tablespaces, which are periodically truncated.
Due to some bugs in MySQL (still digging) truncation process does not complete, leaving MySQL instance alive, but with undo truncation logs:

 [DEV]root@myt-nza7ldt2gfco5nj6 ~ # ls -alh /var/lib/mysql/undo*
 -rw-r----- 1 mysql mysql 80M Feb 3 14:08 /var/lib/mysql/undo_001
 -rw-r----- 1 mysql mysql 80M Feb 3 14:08 /var/lib/mysql/undo_002
 -rw-r----- 1 mysql mysql 16K Feb 3 13:59 /var/lib/mysql/undo_1_trunc.log
 -rw-r----- 1 mysql mysql 16K Feb 3 14:01 /var/lib/mysql/undo_2_trunc.log

These logs will exist for weeks, until MySQL instance restart.

In such situation, PXB fails to create a backup on secondary instance:

 [DEV]root@myt-nza7ldt2gfco5nj6 ~ # /usr/bin/xtrabackup --backup --stream=xbstream --lock-ddl --lock-ddl-timeout=3600 --parallel=1 --datadir=/var/lib/mysql --port=3308 > /dev/null
 xtrabackup: recognized server arguments: --datadir=/var/lib/mysql --tmpdir=/var/lib/mysql/.tmp --innodb_page_size=16384 --innodb_buffer_pool_size=256M --innodb_file_per_table=1 --innodb_log_buffer_size=16777216 --innodb_log_file_size=268435456 --innodb_adaptive_hash_index=1 --innodb_use_native_aio=1 --innodb_flush_method=O_DIRECT --innodb_flush_log_at_trx_commit=1 --innodb_read_io_threads=4 --innodb_write_io_threads=4 --innodb_io_capacity=200 --server-id=4 --log_bin=mysql-bin-log-myt-nza7ldt2gfco5nj6-db-yandex-net --log-bin-index=/var/lib/mysql/mysql-bin-log.index --datadir=/var/lib/mysql 
 xtrabackup: recognized client arguments: --port=3307 --socket=/var/run/mysqld/mysqld.sock --user=admin --password=* --host=myt-nza7ldt2gfco5nj6.db.yandex.net --port=3307 --backup=1 --stream=xbstream --lock-ddl=1 --lock-ddl-timeout=3600 --parallel=1 --port=3308 
 /usr/bin/xtrabackup.bak version 8.0.25-17 based on MySQL server 8.0.25 Linux (x86_64) (revision id: a460572)
 220203 14:02:31 version_check Connecting to MySQL server with DSN 'dbi:mysql:;mysql_read_default_group=xtrabackup;host=myt-nza7ldt2gfco5nj6.db.yandex.net;port=3308;mysql_socket=/var/run/mysqld/mysqld.sock' as 'admin' (using password: YES).
 220203 14:02:31 version_check Connected to MySQL server
 220203 14:02:31 version_check Executing a version check against the server...
 220203 14:02:31 version_check Done.
 220203 14:02:31 Connecting to MySQL server host: myt-nza7ldt2gfco5nj6.db.yandex.net, user: admin, password: set, port: 3308, socket: /var/run/mysqld/mysqld.sock
 Using server version 8.0.25-15
 220203 14:02:32 Executing LOCK TABLES FOR BACKUP...
 xtrabackup: uses posix_fadvise().
 xtrabackup: cd to /var/lib/mysql
 xtrabackup: open files limit requested 0, set to 1024
 xtrabackup: using the following InnoDB configuration:
 xtrabackup: innodb_data_home_dir = .
 xtrabackup: innodb_data_file_path = ibdata1:12M:autoextend
 xtrabackup: innodb_log_group_home_dir = ./
 xtrabackup: innodb_log_files_in_group = 2
 xtrabackup: innodb_log_file_size = 268435456
 2022-02-03 14:02:32 139770467744832 InnoDB: Using Linux native AIO
 xtrabackup: using O_DIRECT
 Number of pools: 1
 xtrabackup: inititialize_service_handles suceeded
 220203 14:02:32 Connecting to MySQL server host: myt-nza7ldt2gfco5nj6.db.yandex.net, user: admin, password: set, port: 3308, socket: /var/run/mysqld/mysqld.sock
 xtrabackup: Redo Log Archiving is not set up.
 Starting to parse redo log at lsn = 66688617652
 Recovery parsing buffer extended to 4194304.
 Recovery parsing buffer extended to 8388608.
 220203 14:02:33 >> log scanned up to (66707951861)
 xtrabackup: Generating a list of tablespaces
 xtrabackup: Generating a list of tablespaces
 Scanning './'
 Directory '/var/lib/mysql/.tmp' will not be scanned because it is a hidden directory.
 Completed space ID check of 2 files.
 Allocated tablespace ID 2 for mysql/mdb_repl_mon, old maximum was 0
 Undo tablespace number 1 was being truncated when mysqld quit.
 Cannot recover a truncated undo tablespace in read-only mode
 xtrabackup: error: xb_load_tablespaces() failed with error code 57

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Assignee:: Rahul Malik (Inactive)

Reporter:: Dmitry Smal

Votes:: 1 Vote for this issue

Watchers:: 5 Start watching this issue

Dates

Created:: 03/Feb/22 11:35 AM

Updated:: 14/Nov/22 4:36 PM

Resolved:: 13/Jul/22 11:29 AM

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