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Percona Server 5.7.22-22

Percona is glad to announce the release of Percona Server 5.7.22-22 on May 31, 2018. Downloads are available here and from the Percona Software Repositories.

This release is based on MySQL 5.7.22 and includes all the bug fixes in it. Percona Server 5.7.22-22 is now the current GA (Generally Available) release in the 5.7 series.

All software developed by Percona is open-source and free.

New Features

  • A new --encrypt-tmp-files option turns on encryption for the temporary files which Percona Server may create on disk for filesort, binary log transactional caches and Group Replication caches.

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Bugs Fixed

  • Executing the SHOW GLOBAL STATUS expression 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_interleave variable 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_accounts variable did not take effect if placed in my.cnf configuration file, while still working as intended if set dynamically. Bug fixed #3867.
  • A key_block_size value was set automatically by the Improved MEMORY Storage Engine, which resulted in warnings when changing the engine type to InnoDB, and constantly growing key_block_size during 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=system option on Ubuntu 14.04 (Trusty) because of too old LZ4 packages. Bug fixed #3842.
  • A regression brought during TokuDB code clean-up in 5.7.21-21 was causing assertion in cases when the FT layer returns an error during an alter table operation. Bug fixed #4294.

MyRocks Changes and Fixes

  • UPDATE statements 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
  • #1114 “Assertion `inited == INDEX’ failed”
  • #1130 “RBR Replication with concurrent XA in READ-COMMITTED takes supremum pseudo-records and breaks replication”
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