本文汇总了多个MySQL中遇到的问题及Bug报告，包括卸载插件导致的崩溃与警告、慢查询日志处理不当引起的挂起、查询解释结果异常等。此外还提到了一个Percona工具套件中的性能下降问题。
1. Bug #72215
When LOCK_plugin conflicts very much, one uninstall-audit-plugin operation crash
2. Bug #72217
When uninstall a audit plugin, there is a warning info which is not correct
3. Bug #72529
rm a large slow log file and then flush slow logs, the mysqld will hang
4. Bug #72646
A strange result from explain query
5. Bug #72705
Add character option to mysql client's prompt
6. Bug #72690
A 5.6's optimizer bug which is releated to 'or' operator's number
7. Bug #72273
innochecksum does not work with crc32 algorithm
8. Bug #72882
Metadata character set causes unnecessary cost for cpu-bound scene
9. Bug #72993
my_hash_sort_utf8 can be optimized if table has many fields
http://bugs.mysql.com/bug.php?id=72993
10. Bug #73091
A character set error may interrupt replication
http://bugs.mysql.com/bug.php?id=73091
一个提给Percona的bug report:
when execute pt-pmp -p pid, the mysqld's tps/qps will drop a lot
https://bugs.launchpad.net/percona-toolkit/+bug/1320168
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