Performance Schema Status Variables

This page documents status variables related to the Performance Schema. See Server Status Variables for a complete list of status variables that can be viewed with SHOW STATUS.

See also the Full list of MariaDB options, system and status variables.

Performance_schema_accounts_lost

• Description: Number of times a row could not be added to the performance schema accounts table due to it being full. The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric
• Introduced: MariaDB 10.0.0

Performance_schema_cond_classes_lost

• Description: Number of condition instruments that could not be loaded.
• Scope: Global, Session
• Data Type: numeric

Performance_schema_cond_instances_lost

• Description: Number of instances a condition object could not be created. The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric

Performance_schema_digest_lost

• Description: The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric

Performance_schema_file_classes_lost

• Description: Number of file instruments that could not be loaded.
• Scope: Global, Session
• Data Type: numeric

Performance_schema_file_handles_lost

• Description: Number of instances a file object could not be opened. The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric

Performance_schema_file_instances_lost

• Description: Number of instances a file object could not be created. The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric

Performance_schema_hosts_lost

• Description: Number of times a row could not be added to the performance schema hosts table due to it being full. The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric
• Introduced: MariaDB 10.0.0

Performance_schema_locker_lost

• Description: Number of events not recorded, due to either being recursive, or having a deeper nested events stack than the implementation limit. The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric

Performance_schema_mutex_classes_lost

• Description: Number of mutual exclusion instruments that could not be loaded.
• Scope: Global, Session
• Data Type: numeric

Performance_schema_mutex_instances_lost

• Description: Number of instances a mutual exclusion object could not be created. The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric

Performance_schema_rwlock_classes_lost

• Description: Number of read/write lock instruments that could not be loaded.
• Scope: Global, Session
• Data Type: numeric

Performance_schema_rwlock_instances_lost

• Description: Number of instances a read/write lock object could not be created. The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric

Performance_schema_session_connect_attrs_lost

• Description: Number of connections for which connection attribute truncation has occurred. The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric
• Introduced: MariaDB 10.0

Performance_schema_socket_classes_lost

• Description:
• Scope: Global, Session
• Data Type: numeric
• Introduced: MariaDB 10.0.0

Performance_schema_socket_instances_lost

• Description: Number of instances a socket object could not be created. The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric
• Introduced: MariaDB 10.0.0

Performance_schema_stage_classes_lost

• Description: Number of stage event instruments that could not be loaded. The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric
• Introduced: MariaDB 10.0.0

Performance_schema_statement_classes_lost

• Description: Number of statement instruments that could not be loaded. The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric
• Introduced: MariaDB 10.0.0

Performance_schema_table_handles_lost

• Description: Number of instances a table object could not be opened. The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric

Performance_schema_table_instances_lost

• Description: Number of instances a table object could not be created. The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric

Performance_schema_thread_classes_lost

• Description: Number of thread instruments that could not be loaded.
• Scope: Global, Session
• Data Type: numeric

Performance_schema_thread_instances_lost

• Description: Number of instances thread object could not be created. The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric

Performance_schema_users_lost

• Description: Number of times a row could not be added to the performance schema users table due to it being full. The global value can be flushed by FLUSH STATUS.
• Scope: Global, Session
• Data Type: numeric