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Type:
New Feature
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Status: Done
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Priority:
Medium
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Resolution: Fixed
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Affects Version/s: 8.0.19-10, 5.7.x, Not 5.6.x
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Fix Version/s: 8.0.20-11
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Component/s: Documentation, MyRocks
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Labels:None
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Needs Review:Yes
Implemented at https://github.com/percona/percona-server/pull/3716/files
1. Add a new variable "rocksdb_table_stats_recalc_threshold_pct":
:dyn: Yes
:scope: Global
:vartype: UINT
:default: 10
:min = 0
:max = 100 (RDB_TBL_STATS_RECALC_THRESHOLD_PCT_MAX)
"Percentage of number of modified rows over total "
"number of rows to trigger stats recalculation",
2. Add a new variable "rocksdb_table_stats_recalc_threshold_count":
:dyn: Yes
:scope: Global
:vartype: ULONGLONG
:default: 100
:min = 0
:max = UINT64_MAX
"Number of modified rows to trigger stats recalculation"
3. Add a new variable "rocksdb_table_stats_background_thread_nice_value":
:dyn: Yes
:scope: Global
:vartype: INT
:default: 19
:min = -20 (THREAD_PRIO_MIN)
:max = 19 (THREAD_PRIO_MAX)
"nice value for index stats",
4. Add a new variable "rocksdb_table_stats_max_num_rows_scanned":
:dyn: Yes
:scope: Global
:vartype: ULONGLONG
:default: 0
:min = 0
:max = UINT64_MAX
"The maximum number of rows to scan in table scan based "
"cardinality calculation",
5. Add a new variable "rocksdb_table_stats_use_table_scan":
:dyn: Yes
:scope: Global
:vartype: BOOL
:default: FALSE
"Enable table scan based index calculation."
6. Add a new variable "rocksdb_trace_block_cache_access":
:dyn: Yes :scope: Global :vartype: String :default: "" (empty string)
"Block cache trace option string. The format is "
"sampling_frequency:max_trace_file_size:trace_file_name. "
"sampling_frequency and max_trace_file_size are positive integers. The "
"block accesses are saved to the "
"rocksdb_datadir/block_cache_traces/trace_file_name.",
- is caused by
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PS-6868 Merge fb-prod201906
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- Done
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