Percona Server for MySQL 5.7.17-12 发布了，Percona Server for MySQL 5.7.17-12 基于 MySQL 5.7.17，包括其中的所有错误修复，该版本现在是 5.7 系列中的稳定版本。更新内容如下：
- Percona Server has implemented new mysqldump
--order-by-primary-descoption. This feature tells mysqldump to take the backup by descending primary key order (
PRIMARY KEY DESC) which can be useful if storage engine is using reverse order column family for a primary key.
- mysqldump will now detect when MyRocks is installed and available by seeing if there is a session variable named
rocksdb_skip_fill_cacheand setting it to
1if it exists.
- mysqldump will now automatically enable session variable
rocksdb_bulk_loadif it is supported by the target server.
- If the variable
thread_handlingwas set to
pool-of-threadsin the MySQL configuration file, the server couldn’t be gracefully shut down. Bug fixed #1537554.
innodb_ft_result_cache_limitwas exceeded by internal memory allocated by InnoDB during the FT scan not all memory was released which could lead to server assertion. Bug fixed #1634932 (upstream #83648).
- Executing the
FLUSH LOGSon a read-only slave with a user that doesn’t have the
SUPERprivilege would result in
Error 1290. Bug fixed #1652852 (upstream #84350).
FLUSH LOGSwas disabled with
super_read_onlyvariables. Bug fixed #1654682(upstream #84437).
PERFORMANCE_SCHEMA.GLOBAL_STATUSquery, and a transaction commit would run in parallel, they could deadlock. Bug fixed #1657128.
- A long-running binary log commit would block
SHOW STATUS, which in turn could block a number of other operations such as client connects and disconnects. Bug fixed #1646100.
- Log tracking initialization did not find last valid bitmap data correctly. Bug fixed #1658055.
- A query using range scan with a complex range condition could lead to a server crash. Bug fixed #1660591(upstream #84736).
- Race condition between buffer pool page optimistic access and eviction could lead to a server crash. Bug fixed #1664280.
- If Audit Log Plugin was unable to create file pointed by
audit_log_file, the server would crash during the startup. Bug fixed #1666496.
DROP TEMPORARY TABLE ...for a table created by a
CREATE TEMPORARY TABLE ... SELECT ...would get logged in the binary log on a disconnect with mixed mode replication. Bug fixed #1671013.
- TokuDB did not use an index with even if cardinality was good. Bug fixed #1671152.
- Row-based replication events were not reflected in
Rows_updatedfields in the User Statistics
INFORMATION_SCHEMAtables. Bug fixed #995624.
DuplicateWeedoutstrategy was used for joins, use was not reported in the query plan info output extension for the slow query log. Bug fixed #1592694.
- It was impossible to use column compression dictionaries with partitioned InnoDB tables. Bug fixed #1653104.
- Diagnostics for OpenSSL errors have been improved. Bug fixed #1660339 (upstream #75311).
其他 bug 修复： #1665545, #1650321, #1654501, #1663251, #1659548, #1663452, #1670834, #1672871, #1626545, #1658006, #1658021, #1659218, #1659746, #1660239, #1660243, #1660348, #1662163 (upstream #81467), #1664219, #1664473, #1671076, 和 #1671123.