线程

https://dev.mysql.com/doc/refman/8.0/en/mysql-threads.html

参数

https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar_thread_cache_size

MySQL Enterprise Edition线程池

https://dev.mysql.com/doc/refman/8.0/en/thread-pool.html

Innodb线程

并发

https://dev.mysql.com/doc/refman/8.0/en/innodb-performance-thread_concurrency.html

参数

innodb_thread_concurrency
innodb_thread_sleep_delay
innodb_concurrency_tickets

后台线程

Master Thread

IO Thread

工具

http://www.fordba.com/percona-toolkit-pt-pmp.html