Percona Server for MySQL 5.7.22-22 已于 5 月 31 日发布，基于 MySQL 5.7.22，包含其中所有的 bug 修复，Percona Server for MySQL 5.7.22-22 是目前 5.7 系列的最新稳定版本。更新如下：
New Features:
A new
--encrypt-tmp-filesoption turns on encryption for the temporary files which Percona Server may create on disk for filesort, binary log transactional caches and Group Replication caches.
Bugs Fixed:
Executing the
SHOW GLOBAL STATUSexpression could cause “data drift” on global status variables in case of a query rollback: the variable, being by its nature a counter and allowing only an increase, could return to its previous value. Bug fixed #3951 (upstream #90351).NUMA support was improved in Percona Server, reverting upstream implementation back to the original one,due to upstream variant being less effective in memory allocation. Now
innodb_numa_interleavevariable not only enables NUMA interleave memory policy for the InnoDB buffer pool allocation, but forces NUMA interleaved allocation at the buffer pool initialization time. Bug fixed #3967.audit_log_include_accountsvariable did not take effect if placed inmy.cnfconfiguration file, while still working as intended if set dynamically. Bug fixed #3867.A
key_block_sizevalue was set automatically by the Improved MEMORY Storage Engine, which resulted in warnings when changing the engine type to InnoDB, and constantly growingkey_block_sizeduring alter operations. Bugs fixed #3936, #3940, and #3943.Fixes were introduced to remove GCC 8 compilation warnings for the Percona Server build. Bug fixed #3950.
An InnoDB Memcached Plugin code clean-up was backported from MySQL 8.0. Bug fixed #4506.
Percona Server could not be built with
-DWITH_LZ4=systemoption on Ubuntu 14.04 (Trusty) because of too old LZ4 packages. Bug fixed #3842.A regression brought during TokuDB code clean-up in
5.7.21-21was causing assertion in cases when the FT layer returns an error during an alter table operation. Bug fixed #4294.
MyRocks Changes and fixes:
UPDATEstatements were returning incorrect results because of not making a full table scan on tables with unique secondary index. Bug fixed #4495 (upstream facebook/mysql-5.6#830).
Other Bugs Fixed:
#4451 “Implement better compression algo testing”
#4469 “variable use out of scope bug in get_last_key test detected by ASAN in clang 6”
#4470 “the cachetable-simple-pin-nonblocking-cheap test occasionally fails due to a locking conflict with the cachetable evictor”
#4488 “-Werror is always disabled for innodb_memcached”
#1130 “RBR Replication with concurrent XA in READ-COMMITTED takes supremum pseudo-records and breaks replication”
下载地址：
https://www.percona.com/downloads/Percona-Server-5.7/Percona-Server-5.7.22-22/
https://github.com/percona/percona-server/releases/tag/Percona-Server-5.7.22-22