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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;
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