Improvements¶

• #4790: Improve user statistics accuracy

Other improvements

• #4881: Add LLVM/clang 7 to Travis-CI

Bugs Fixed¶

• Slave replication could break if upstream bug #74145 (FLUSH LOGS improperly disables the logging if the log file cannot be accessed) occurred in master. Bug fixed #1017 (Upstream #83232).
• The binary log could be corrupted when the disk partition used for temporary. files (tmpdir system variable) had little free space. Bug fixed #1107 (Upstream #72457).
• PURGE CHANGED_PAGE_BITMAPS did not work when the innodb_data_home_dir system variable was used. Bug fixed #4723.
• Setting the tokudb_last_lock_timeout variable via command line could cause server to stop working when the actual timeout took place. Bug fixed #4943.
• Dropping TokuDB table with non-alphanumeric characters could lead to a crash. Bug fixed #4979.

Other bugs fixed

• #4781: sql_yacc.yy uses SQLCOM_SELECT instead of SQLCOM_SHOW_XXXX_STATS
• #4529: MTR: index_merge_rocksdb2 inadvertently tests InnoDB instead of MyRocks
• #4746: Revert our fix for PS-3851 (Percona Ver 5.6.39-83.1 Failing assertion: sym_node->table != NULL)
• #4773: Percona Server sources can’t be compiled without server
• #4785: Setting version_suffix to NULL leads to handle_fatal_signal (sig=11) in Sys_var_version::global_value_ptr
• #4813: Using flush_caches leads to SELinux denial errors

Find the release notes for Percona Server for MySQL 5.6.42-84.2 in our online documentation. Report bugs in the Jira bug tracker.