Percona Server 5.6.35-80.0 发布，MySQL 衍生版

Percona Server 5.6.35-80.0 发布了，该版本基于 MySQL 5.6.35，并包括其中的所有错误修复。

作为 MySQL 的最新替代、衍生版本，Percona Server 是开源的和免费的。

更新内容：

新特性:

Kill Idle Transactions 功能已通过设置连接套接字读取超时值而不是定期扫描内部InnoDB事务列表来重新实现。这使得该功能适用于任何事务存储引擎，如TokuDB，以及未来的MyRocks。这种重新实现还解决了一些现有的错误，包括服务器崩溃：#1166744, #1179136, #907719 和 #1369373。

Bugs 修复:

Logical row counts for TokuDB tables could get inaccurate over time.
Repeated execution of SET STATEMENT ... FOR SELECT FROM view could lead to a server crash.
CREATE TEMPORARY TABLE would create a transaction in binary log on a read-only server.
If temporary tables from CREATE TABLE ... AS SELECT contained compressed attributes it could lead to a server crash.
Using the per-query variable statement with subquery temporary tables could cause a memory leak.
Fixed new compilation warnings with GCC 6.
A server could crash if a bitmap write I/O error happens in the background log tracking thread while a FLUSH CHANGED_PAGE_BITMAPS is executing concurrently.
TokuDB was using the wrong function to calculate free space in data files.
CONCURRENT_CONNECTIONS column in the USER_STATISTICS table was showing incorrect values.
InnoDB index dives did not detect some of the concurrent tree changes, which could return bogus estimates.
INFORMATION_SCHEMA.INNODB_CHANGED_PAGES queries would needlessly read potentially incomplete bitmap data past the needed LSN range.
Percona Server cmake compiler would always attempt to build RocksDB even if -DWITHOUT_ROCKSDB=1argument was specified.
Adding COMPRESSED attributes to InnoDB special tables fields (like mysql.innodb_index_stats and mysql.innodb_table_stats) could lead to server crashes.
Lack of free pages in the buffer pool is not diagnosed with innodb_empty_free_list_algorithm set to backoff (which is the default).
mysqld_safe now limits the use of rm and chown to avoid privilege escalation. chown can now be used only for /var/log directory.
Renaming a TokuDB table to a non-existent database with tokudb_dir_per_db enabled would lead to a server crash.
Read Free Replication optimization could not be used for TokuDB partition tables.