Percona Server for MySQL 5.7.23-23 已发布，基于 MySQL 5.7.23，包含其中所的 bug 修复，Percona Server for MySQL 5.7.23-2 是目前 5.7 系列的最新稳定版本。更新如下：
max_binlog_filesvariable is deprecated, and the
binlog_space_limitvariable should be used instead of it. The behavior of
binlog_space_limitis consistent with the variable
relay-log-space-limitused for relay logs; both variables have the same semantics. For more information, see #275.
Starting with 5.7.23-23, it is possible to encrypt all data in the InnoDB system tablespace and in the parallel double write buffer. This feature is considered ALPHA quality. A new variable
innodb_sys_tablespace_encryptis introduced to encrypt the system tablespace. The encryption of the parallel double write buffer file is controlled by the variable
innodb_parallel_dblwr_encrypt. Both variables are
OFFby default. For more information, see #3822.
rocksdb_update_cf_optionsreturns any warnings and errors to the client instead of printing them to the server error log. For more information, see #4258.
rocksdb_rate_limit_delay_millisvariables have been removed. For more information, see #4780.
A number of new variables were introduced for MyRocks:
rocksdb_rows_filteredto show the number of rows filtered out for TTL in MyRocks tables,
rocksdb_bulk_load_allow_skto allow adding secondary keys using the bulk loading feature,
rocksdb_error_on_suboptimal_collationtoggling warning or error in case of an index creation on a char field where the table has a sub-optimal collation,
rocksdb_stats_recalc_ratespecifying the number of indexes to recalculate per second,
rocksdb_commit_time_batch_for_recoverytoggler of writing the commit time write batch into the database, and
rocksdb_write_policyspecifying when two-phase commit data are actually written into the database.
InnoDB statistics could incorrectly report zeros in the slow query log. Bug fixed #3828.
With the FIPS mode enabled and performance_schema=off, the instance crashed when running the
CREATE VIEWcommand. Bug fixed #3840.
The soft limit of the core file size was set incorrectly starting with PS 5.7.21-20. Bug fixed #4479.
innodb-optimize-keyscould fail when a dumped table has two columns such that the name of one of them contains the other as as a prefix and is defined with the AUTO_INCREMENT attribute. Bug fixed #4524.
innodb_temp_tablespace_encryptwas set to
CREATE TABLEcommand could ignore the value of the
ENCRYPTIONoption. Bug fixed #4565.
A message in the MyRocks log file did not clearly inform whether fast CRC32 was supported. Bug fixed #3988.
The ALTER TABLE command was slow when the number of dirty pages was high. Bug fixed #3702.
Setting the global variable
version_suffixto NULL could lead to a server crash. Bug fixed #4785.