Server Option, System Variable, and Status Variable Reference Name Cmd-Line Option File System Var Status Var Var Scope Dynamic performance- schema- consumer- thread- instrumentation Yes Yes Performance_schema_digest_lost Yes Global No performance_schema_digests_size Yes Yes Yes Global No performance_schema_error_size Yes Yes Yes Global No performance_schema_events_stages_history_long_size Yes Yes Yes Global No performance_schema_events_stages_history_size Yes Yes Yes Global No performance_schema_events_statements_history_long_size Yes Yes Yes Global No performance_schema_events_statements_history_size Yes Yes Yes Global No performance_schema_events_transactions_history_long_size Yes Yes Yes Global No performance_schema_events_transactions_history_size Yes Yes Yes Global No performance_schema_events_waits_history_long_size Yes Yes Yes Global No performance_schema_events_waits_history_size Yes Yes Yes Global No Performance_schema_file_classes_lost Yes Global No Performance_schema_file_handles_lost Yes Global No Performance_schema_file_instances_lost Yes Global No Performance_schema_hosts_lost Yes Global No performance_schema_hosts_size Yes Yes Yes Global No Performance_schema_index_stat_lost Yes Global No performance- schema- instrument Yes Yes Performance_schema_locker_lost Yes Global No performance_schema_max_cond_classes Yes Yes Yes Global No performance_schema_max_cond_instances Yes Yes Yes Global No performance_schema_max_digest_length Yes Yes Yes Global No performance_schema_max_digest_sample_age Yes Yes Yes Global Yes performance_schema_max_file_classes Yes Yes Yes Global No performance_schema_max_file_handles Yes Yes Yes Global No performance_schema_max_file_instances Yes Yes Yes Global No performance_schema_max_index_stat Yes Yes Yes Global No performance_schema_max_memory_classes Yes Yes Yes Global No performance_schema_max_metadata_locks Yes Yes Yes Global No performance_schema_max_mutex_classes Yes Yes Yes Global No performance_schema_max_mutex_instances Yes Yes Yes Global No performance_schema_max_prepared_statements_instances Yes Yes Yes Global No 679