rocksdb_sys_vars.rocksdb_update_cf_options_basic is unstable

==============================================================================

TEST                                      RESULT   TIME (ms) or COMMENT
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worker[1] Using MTR_BUILD_THREAD 300, with reserved ports 13000..13009
rocksdb_sys_vars.rocksdb_update_cf_options_basic [ pass ]    617
rocksdb_sys_vars.rocksdb_update_cf_options_basic [ fail ]
        Test ended at 2017-07-19 18:07:14

CURRENT_TEST: rocksdb_sys_vars.rocksdb_update_cf_options_basic
--- /ssd/percona/myrocks/facebook-mysql-install-5.6/mysql-test/suite/rocksdb_sys_vars/r/rocksdb_update_cf_options_basic.result	2017-07-08 19:22:36.000000000 +0300
+++ /ssd/percona/myrocks/facebook-mysql-install-5.6/mysql-test/var/log/rocksdb_update_cf_options_basic.reject	2017-07-20 04:07:14.267548425 +0300
@@ -38,10 +38,10 @@
 NULL
 SELECT * FROM ROCKSDB_CF_OPTIONS WHERE CF_NAME='default' AND OPTION_TYPE='WRITE_BUFFER_SIZE';
 CF_NAME	OPTION_TYPE	VALUE
-default	WRITE_BUFFER_SIZE	67108864
+default	WRITE_BUFFER_SIZE	8388608
 SELECT * FROM ROCKSDB_CF_OPTIONS WHERE CF_NAME='default' AND OPTION_TYPE='TARGET_FILE_SIZE_BASE';
 CF_NAME	OPTION_TYPE	VALUE
-default	TARGET_FILE_SIZE_BASE	67108864
+default	TARGET_FILE_SIZE_BASE	2097152
 SET @@global.rocksdb_update_cf_options = 'default={write_buffer_size=8m;target_file_size_base=2m};';
 SELECT @@global.rocksdb_update_cf_options;
 @@global.rocksdb_update_cf_options
@@ -54,19 +54,19 @@
 default	TARGET_FILE_SIZE_BASE	2097152
 SELECT * FROM ROCKSDB_CF_OPTIONS WHERE CF_NAME='cf1' AND OPTION_TYPE='WRITE_BUFFER_SIZE';
 CF_NAME	OPTION_TYPE	VALUE
-cf1	WRITE_BUFFER_SIZE	67108864
+cf1	WRITE_BUFFER_SIZE	8388608
 SELECT * FROM ROCKSDB_CF_OPTIONS WHERE CF_NAME='cf1' AND OPTION_TYPE='TARGET_FILE_SIZE_BASE';
 CF_NAME	OPTION_TYPE	VALUE
-cf1	TARGET_FILE_SIZE_BASE	67108864
+cf1	TARGET_FILE_SIZE_BASE	25165824
 SELECT * FROM ROCKSDB_CF_OPTIONS WHERE CF_NAME='cf2' AND OPTION_TYPE='WRITE_BUFFER_SIZE';
 CF_NAME	OPTION_TYPE	VALUE
-cf2	WRITE_BUFFER_SIZE	67108864
+cf2	WRITE_BUFFER_SIZE	16777216
 SELECT * FROM ROCKSDB_CF_OPTIONS WHERE CF_NAME='cf2' AND OPTION_TYPE='MAX_BYTES_FOR_LEVEL_MULTIPLIER';
 CF_NAME	OPTION_TYPE	VALUE
-cf2	MAX_BYTES_FOR_LEVEL_MULTIPLIER	10.000000
+cf2	MAX_BYTES_FOR_LEVEL_MULTIPLIER	8.000000
 SELECT * FROM ROCKSDB_CF_OPTIONS WHERE CF_NAME='cf3' AND OPTION_TYPE='TARGET_FILE_SIZE_BASE';
 CF_NAME	OPTION_TYPE	VALUE
-cf3	TARGET_FILE_SIZE_BASE	67108864
+cf3	TARGET_FILE_SIZE_BASE	25165824
 SET @@global.rocksdb_update_cf_options = 'cf1={write_buffer_size=8m;target_file_size_base=2m};cf2={write_buffer_size=16m;max_bytes_for_level_multiplier=8};cf3={target_file_size_base=4m};';
 SELECT @@global.rocksdb_update_cf_options;
 @@global.rocksdb_update_cf_options

mysqltest: Result content mismatch

 - saving '/ssd/percona/myrocks/facebook-mysql-install-5.6/mysql-test/var/log/rocksdb_sys_vars.rocksdb_update_cf_options_basic/' to '/ssd/percona/myrocks/facebook-mysql-install-5.6/mysql-test/var/log/rocksdb_sys_vars.rocksdb_update_cf_options_basic/'
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The servers were restarted 0 times
Spent 0.617 of 9 seconds executing testcases

Completed: Failed 1/2 tests, 50.00% were successful.

Failing test(s): rocksdb_sys_vars.rocksdb_update_cf_options_basic