Performance Schema

TiDB 实现了 performance schema 表以实现 MySQL 兼容性。

用于 MySQL 兼容性的表

Table name	Description
`events_stages_current`
`events_stages_history`
`events_stages_history_long`
`events_statements_current`
`events_statements_history`
`events_statements_history_long`
`events_statements_summary_by_digest`
`events_transactions_current`
`events_transactions_history`
`events_transactions_history_long`
`global_status`
`prepared_statements_instances`
`session_connect_attrs`	提供会话的连接属性。
`session_status`
`session_variables`
`setup_actors`
`setup_consumers`
`setup_instruments`
`setup_objects`