Performance Schema cond_instances Table

MariaDB starting with 10.0

The cond_instances table, along with many other new Performance Schema tables, was added in MariaDB 10.0


The cond_instances table lists all conditions while the server is executing. A condition, or instrumented condition object, is an internal code mechanism used for signalling that a specific event has occurred so that any threads waiting for this condition can continue.

The maximum number of conditions stored in the performance schema is determined by the performance_schema_max_cond_instances system variable.

NAMEClient user name for the connection, or NULL if an internal thread.
OBJECT_INSTANCE_BEGINAddress in memory of the instrumented condition.


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