27.12.20 Performance Schema Miscellaneous Tables

27.12.20.1 The error_log Table

27.12.20.2 The host_cache Table

27.12.20.3 The keyring_keys table

27.12.20.4 The log_status Table

27.12.20.5 The performance_timers Table

27.12.20.6 The processlist Table

27.12.20.7 The threads Table

27.12.20.8 The tls_channel_status Table

27.12.20.9 The user_defined_functions Table

The following sections describe tables that do not fall into the table categories discussed in the preceding sections:

• error_log: The most recent events written to the error log.

• host_cache: Information from the internal host cache.

• keyring_keys: Metadata for keys in the MySQL keyring.

• log_status: Information about server logs for backup purposes.

• performance_timers: Which event timers are available.

• threads: Information about server threads.

• tls_channel_status: TLS context properties for connection interfaces.

• user_defined_functions: User-defined functions registered by a component, plugin, or CREATE FUNCTION statement.