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DESC INFORMATION_SCHEMA.THREAD_POOL_GROUPS; Field Type Null Key Default Extra GROUP_ID int(6) NO NULL CONNECTIONS int(6) NO NULL THREADS int(6) NO NULL ACTIVE_THREADS int(6) NO NULL STANDBY_THREADS int(6) NO NULL QUEUE_LENGTH int(6) NO NULL HAS_LISTENER tinyint(1) NO NULL IS_STALLED tinyint(1) NO NULL SELECT COUNT(*)=@@thread_pool_size FROM INFORMATION_SCHEMA.THREAD_POOL_GROUPS; COUNT(*)=@@thread_pool_size 1 SELECT SUM(CONNECTIONS) FROM INFORMATION_SCHEMA.THREAD_POOL_GROUPS; SUM(CONNECTIONS) 1 SELECT SUM(THREADS) > 0 FROM INFORMATION_SCHEMA.THREAD_POOL_GROUPS; SUM(THREADS) > 0 1 SELECT SUM(ACTIVE_THREADS) > 0 FROM INFORMATION_SCHEMA.THREAD_POOL_GROUPS; SUM(ACTIVE_THREADS) > 0 1 SELECT SUM(QUEUE_LENGTH) FROM INFORMATION_SCHEMA.THREAD_POOL_GROUPS; SUM(QUEUE_LENGTH) 0 SELECT SUM(IS_STALLED) FROM INFORMATION_SCHEMA.THREAD_POOL_GROUPS; SUM(IS_STALLED) 0 DESC INFORMATION_SCHEMA.THREAD_POOL_STATS; Field Type Null Key Default Extra GROUP_ID int(6) NO NULL THREAD_CREATIONS bigint(19) NO NULL THREAD_CREATIONS_DUE_TO_STALL bigint(19) NO NULL WAKES bigint(19) NO NULL WAKES_DUE_TO_STALL bigint(19) NO NULL THROTTLES bigint(19) NO NULL STALLS bigint(19) NO NULL POLLS_BY_LISTENER bigint(19) NO NULL POLLS_BY_WORKER bigint(19) NO NULL DEQUEUES_BY_LISTENER bigint(19) NO NULL DEQUEUES_BY_WORKER bigint(19) NO NULL SELECT SUM(DEQUEUES_BY_LISTENER+DEQUEUES_BY_WORKER) > 0 FROM INFORMATION_SCHEMA.THREAD_POOL_STATS; SUM(DEQUEUES_BY_LISTENER+DEQUEUES_BY_WORKER) > 0 1 SELECT SUM(POLLS_BY_LISTENER+POLLS_BY_WORKER) > 0 FROM INFORMATION_SCHEMA.THREAD_POOL_STATS; SUM(POLLS_BY_LISTENER+POLLS_BY_WORKER) > 0 1 FLUSH THREAD_POOL_STATS; SELECT SUM(DEQUEUES_BY_LISTENER+DEQUEUES_BY_WORKER) FROM INFORMATION_SCHEMA.THREAD_POOL_STATS; SUM(DEQUEUES_BY_LISTENER+DEQUEUES_BY_WORKER) 1 SELECT SUM(POLLS_BY_LISTENER) FROM INFORMATION_SCHEMA.THREAD_POOL_STATS; SUM(POLLS_BY_LISTENER) 2 SELECT SUM(POLLS_BY_WORKER) FROM INFORMATION_SCHEMA.THREAD_POOL_STATS; SUM(POLLS_BY_WORKER) 0 DESC INFORMATION_SCHEMA.THREAD_POOL_WAITS; Field Type Null Key Default Extra REASON varchar(16) NO NULL COUNT bigint(19) NO NULL SELECT REASON FROM INFORMATION_SCHEMA.THREAD_POOL_WAITS; REASON UNKNOWN SLEEP DISKIO ROW_LOCK GLOBAL_LOCK META_DATA_LOCK TABLE_LOCK USER_LOCK BINLOG GROUP_COMMIT SYNC NET SELECT COUNT FROM INFORMATION_SCHEMA.THREAD_POOL_WAITS WHERE REASON='Sleep'; COUNT 0 SELECT SLEEP(0.01); SLEEP(0.01) 0 SELECT COUNT FROM INFORMATION_SCHEMA.THREAD_POOL_WAITS WHERE REASON='Sleep'; COUNT 1 FLUSH THREAD_POOL_WAITS; DESC INFORMATION_SCHEMA.THREAD_POOL_QUEUES; Field Type Null Key Default Extra GROUP_ID int(6) NO NULL POSITION int(6) NO NULL PRIORITY int(1) NO NULL CONNECTION_ID bigint(19) unsigned YES NULL QUEUEING_TIME_MICROSECONDS bigint(19) NO NULL # restart: with restart_parameters connect con1, localhost, root,,test; connection con1; connect con2, localhost, root,,test; connection con2; connect extra_con,127.0.0.1,root,,test,$extra_port,; connection con1; SELECT SLEEP(1000); connection extra_con; connection con2; DO 1; connection extra_con; KILL QUERY con1_id; disconnect extra_con; connection con1; disconnect con1; connection con2; disconnect con2; connection default;