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Important

You are viewing the archived documentation of TiDB, which no longer receives updates. It is recommended that you use the latest LTS version of the TiDB database.

Performance Schema

TiDB implements performance schema tables for MySQL compatibility.

Tables for MySQL compatibility

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`	Provides connection attributes for sessions.
`session_status`
`session_variables`
`setup_actors`
`setup_consumers`
`setup_instruments`
`setup_objects`

Tables that are TiDB extensions

Table name	Description
`pd_profile_allocs`
`pd_profile_block`
`pd_profile_cpu`
`pd_profile_goroutines`
`pd_profile_memory`
`pd_profile_mutex`
`tidb_profile_allocs`
`tidb_profile_block`
`tidb_profile_cpu`
`tidb_profile_goroutines`
`tidb_profile_memory`
`tidb_profile_mutex`
`tikv_profile_cpu`