Percona Toolkit 2.2.20 发布了，Percona Toolkit 是一组高级的命令行工具，用来管理 MySQL 和系统任务，主要包括：
验证主节点和复制数据的一致性
有效的对记录行进行归档
找出重复的索引
总结 MySQL 服务器
从日志和 tcpdump 中分析查询
问题发生时收集重要的系统信息
更新内容：
新功能
New --pause-file option has been implemented for pt-online-schema-change. When used pt-online-schema-change will pause while the specified file exists.
pt-online-schema-change now supports adding and removing the DATA DIRECTORY to a new table with the --data-dir and --remove-data-dir options.
Following schemas/tables have been added to the default ignore list: mysql.gtid_execution, sys.sys_config, mysql.proc, mysql.inventory, mysql.plugin, percona.* (including checksums, DSNs table), test.*, and percona_schema.*
pt-summary now provides information about Transparent huge pages.
New --preserve-embedded-numbers option was implemented for pt-query-digest which can be used to preserve numbers in database/table names when fingerprinting queries.
下载地址：
https://www.percona.com/downloads/percona-toolkit/
软件详情：https://www.percona.com/blog/2016/12/09/percona-toolkit-2-2-20-is-now-available/
来自:开源中国社区
