mysql> select * from information_schema.innodb_locks;select * from information_schema.innodb_lock_waits;select * from information_schema.innodb_trx;show engine innodb status; +----------------+-------------+-----------+-----------+----------------------------+------------+------------+-----------+----------+-----------+ | lock_id | lock_trx_id | lock_mode | lock_type | lock_table | lock_index | lock_space | lock_page | lock_rec | lock_data | +----------------+-------------+-----------+-----------+----------------------------+------------+------------+-----------+----------+-----------+ | 167568:252:3:5 | 167568 | S | RECORD | `test_db`.`message_entity` | PRIMARY | 252 | 3 | 5 | 30 | | 167565:252:3:5 | 167565 | X | RECORD | `test_db`.`message_entity` | PRIMARY | 252 | 3 | 5 | 30 | | 167567:252:3:3 | 167567 | S | RECORD | `test_db`.`message_entity` | PRIMARY | 252 | 3 | 3 | 20 | | 167560:252:3:3 | 167560 | X | RECORD | `test_db`.`message_entity` | PRIMARY | 252 | 3 | 3 | 20 | | 167566:252:3:4 | 167566 | S | RECORD | `test_db`.`message_entity` | PRIMARY | 252 | 3 | 4 | 10 | | 167559:252:3:4 | 167559 | X | RECORD | `test_db`.`message_entity` | PRIMARY | 252 | 3 | 4 | 10 | +----------------+-------------+-----------+-----------+----------------------------+------------+------------+-----------+----------+-----------+ 6 rows in set (0.13 sec) +-------------------+-------------------+-----------------+------------------+ | requesting_trx_id | requested_lock_id | blocking_trx_id | blocking_lock_id | +-------------------+-------------------+-----------------+------------------+ | 167568 | 167568:252:3:5 | 167565 | 167565:252:3:5 | | 167567 | 167567:252:3:3 | 167560 | 167560:252:3:3 | | 167566 | 167566:252:3:4 | 167559 | 167559:252:3:4 | +-------------------+-------------------+-----------------+------------------+ 3 rows in set (0.13 sec) +--------+-----------+---------------------+-----------------------+---------------------+------------+---------------------+---------------------------------------------------------------+---------------------+-------------------+-------------------+------------------+-----------------------+-----------------+-------------------+-------------------------+---------------------+-------------------+------------------------+----------------------------+---------------------------+---------------------------+------------------+----------------------------+ | trx_id | trx_state | trx_started | trx_requested_lock_id | trx_wait_started | trx_weight | trx_mysql_thread_id | trx_query | trx_operation_state | trx_tables_in_use | trx_tables_locked | trx_lock_structs | trx_lock_memory_bytes | trx_rows_locked | trx_rows_modified | trx_concurrency_tickets | trx_isolation_level | trx_unique_checks | trx_foreign_key_checks | trx_last_foreign_key_error | trx_adaptive_hash_latched | trx_adaptive_hash_timeout | trx_is_read_only | trx_autocommit_non_locking | +--------+-----------+---------------------+-----------------------+---------------------+------------+---------------------+---------------------------------------------------------------+---------------------+-------------------+-------------------+------------------+-----------------------+-----------------+-------------------+-------------------------+---------------------+-------------------+------------------------+----------------------------+---------------------------+---------------------------+------------------+----------------------------+ | 167568 | LOCK WAIT | 2021-02-10 16:38:16 | 167568:252:3:5 | 2021-02-10 16:38:16 | 2 | 13471 | INSERT INTO `message_entity` (`id`,`chat_id`) VALUES (30,30) | inserting | 1 | 1 | 2 | 360 | 1 | 0 | 0 | READ COMMITTED | 1 | 1 | NULL | 0 | 10000 | 0 | 0 | | 167567 | LOCK WAIT | 2021-02-10 16:37:43 | 167567:252:3:3 | 2021-02-10 16:37:43 | 2 | 13470 | INSERT INTO `message_entity` (`id`,`chat_id`) VALUES (20,20) | inserting | 1 | 1 | 2 | 360 | 1 | 0 | 0 | READ COMMITTED | 1 | 1 | NULL | 0 | 10000 | 0 | 0 | | 167566 | LOCK WAIT | 2021-02-10 16:35:08 | 167566:252:3:4 | 2021-02-10 16:35:08 | 2 | 13469 | INSERT INTO `message_entity` (`id`,`chat_id`) VALUES (10,10) | inserting | 1 | 1 | 2 | 360 | 1 | 0 | 0 | READ COMMITTED | 1 | 1 | NULL | 0 | 10000 | 0 | 0 | | 167565 | RUNNING | 2021-02-10 16:34:52 | NULL | NULL | 3 | 13468 | NULL | NULL | 0 | 0 | 2 | 360 | 1 | 1 | 0 | READ COMMITTED | 1 | 1 | NULL | 0 | 10000 | 0 | 0 | | 167560 | RUNNING | 2021-02-10 16:34:46 | NULL | NULL | 3 | 13467 | NULL | NULL | 0 | 0 | 2 | 360 | 1 | 1 | 0 | READ COMMITTED | 1 | 1 | NULL | 0 | 10000 | 0 | 0 | | 167559 | RUNNING | 2021-02-10 16:34:43 | NULL | NULL | 3 | 13466 | NULL | NULL | 0 | 0 | 2 | 360 | 1 | 1 | 0 | READ COMMITTED | 1 | 1 | NULL | 0 | 10000 | 0 | 0 | +--------+-----------+---------------------+-----------------------+---------------------+------------+---------------------+---------------------------------------------------------------+---------------------+-------------------+-------------------+------------------+-----------------------+-----------------+-------------------+-------------------------+---------------------+-------------------+------------------------+----------------------------+---------------------------+---------------------------+------------------+----------------------------+ 6 rows in set (0.09 sec) 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| InnoDB | | ===================================== 2021-02-10 16:38:20 7efe3d82a700 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 22 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 5404 srv_active, 0 srv_shutdown, 29163207 srv_idle srv_master_thread log flush and writes: 29168563 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 5639 OS WAIT ARRAY INFO: signal count 5634 Mutex spin waits 153, rounds 4590, OS waits 138 RW-shared spins 5373, rounds 163350, OS waits 5445 RW-excl spins 7, rounds 1680, OS waits 52 Spin rounds per wait: 30.00 mutex, 30.40 RW-shared, 240.00 RW-excl ------------------------ LATEST DETECTED DEADLOCK ------------------------ ------------ TRANSACTIONS ------------ Trx id counter 167569 Purge done for trx's n:o < 167565 undo n:o < 0 state: running but idle History list length 1475 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 0, not started MySQL thread id 13465, OS thread handle 0x7efe3d82a700, query id 396292 111.225.145.209 root init show engine innodb status ---TRANSACTION 167522, not started MySQL thread id 13461, OS thread handle 0x7efe3d764700, query id 396165 111.225.145.239 root ---TRANSACTION 167568, ACTIVE 4 sec inserting mysql tables in use 1, locked 1 LOCK WAIT 2 lock struct(s), heap size 360, 1 row lock(s) MySQL thread id 13471, OS thread handle 0x7efe3d722700, query id 396288 111.225.144.149 root update INSERT INTO `message_entity` (`id`,`chat_id`) VALUES (30,30) ------- TRX HAS BEEN WAITING 4 SEC FOR THIS LOCK TO BE GRANTED: RECORD LOCKS space id 252 page no 3 n bits 72 index `PRIMARY` of table `test_db`.`message_entity` trx id 167568 lock mode S locks rec but not gap waiting Record lock, heap no 5 PHYSICAL RECORD: n_fields 4; compact format; info bits 0 0: len 8; hex 000000000000001e; asc ;; 1: len 6; hex 000000028e8d; asc ;; 2: len 7; hex d6000001b90110; asc ;; 3: len 8; hex 000000000000001e; asc ;; ------------------ TABLE LOCK table `test_db`.`message_entity` trx id 167568 lock mode IX RECORD LOCKS space id 252 page no 3 n bits 72 index `PRIMARY` of table `test_db`.`message_entity` trx id 167568 lock mode S locks rec but not gap waiting Record lock, heap no 5 PHYSICAL RECORD: n_fields 4; compact format; info bits 0 0: len 8; hex 000000000000001e; asc ;; 1: len 6; hex 000000028e8d; asc ;; 2: len 7; hex d6000001b90110; asc ;; 3: len 8; hex 000000000000001e; asc ;; ---TRANSACTION 167567, ACTIVE 37 sec inserting mysql tables in use 1, locked 1 LOCK WAIT 2 lock struct(s), heap size 360, 1 row lock(s) MySQL thread id 13470, OS thread handle 0x7efe3d7a6700, query id 396278 111.225.146.239 root update INSERT INTO `message_entity` (`id`,`chat_id`) VALUES (20,20) ------- TRX HAS BEEN WAITING 37 SEC FOR THIS LOCK TO BE GRANTED: RECORD LOCKS space id 252 page no 3 n bits 72 index `PRIMARY` of table `test_db`.`message_entity` trx id 167567 lock mode S locks rec but not gap waiting Record lock, heap no 3 PHYSICAL RECORD: n_fields 4; compact format; info bits 0 0: len 8; hex 0000000000000014; asc ;; 1: len 6; hex 000000028e88; asc ;; 2: len 7; hex d3000001fe0110; asc ;; 3: len 8; hex 0000000000000014; asc ;; ------------------ TABLE LOCK table `test_db`.`message_entity` trx id 167567 lock mode IX RECORD LOCKS space id 252 page no 3 n bits 72 index `PRIMARY` of table `test_db`.`message_entity` trx id 167567 lock mode S locks rec but not gap waiting Record lock, heap no 3 PHYSICAL RECORD: n_fields 4; compact format; info bits 0 0: len 8; hex 0000000000000014; asc ;; 1: len 6; hex 000000028e88; asc ;; 2: len 7; hex d3000001fe0110; asc ;; 3: len 8; hex 0000000000000014; asc ;; ---TRANSACTION 167566, ACTIVE 192 sec inserting mysql tables in use 1, locked 1 LOCK WAIT 2 lock struct(s), heap size 360, 1 row lock(s) MySQL thread id 13469, OS thread handle 0x7efe42afe700, query id 396236 111.225.144.149 root update INSERT INTO `message_entity` (`id`,`chat_id`) VALUES (10,10) ------- TRX HAS BEEN WAITING 192 SEC FOR THIS LOCK TO BE GRANTED: RECORD LOCKS space id 252 page no 3 n bits 72 index `PRIMARY` of table `test_db`.`message_entity` trx id 167566 lock mode S locks rec but not gap waiting Record lock, heap no 4 PHYSICAL RECORD: n_fields 4; compact format; info bits 0 0: len 8; hex 000000000000000a; asc ;; 1: len 6; hex 000000028e87; asc ;; 2: len 7; hex d20000016b0110; asc k ;; 3: len 8; hex 000000000000000a; asc ;; ------------------ TABLE LOCK table `test_db`.`message_entity` trx id 167566 lock mode IX RECORD LOCKS space id 252 page no 3 n bits 72 index `PRIMARY` of table `test_db`.`message_entity` trx id 167566 lock mode S locks rec but not gap waiting Record lock, heap no 4 PHYSICAL RECORD: n_fields 4; compact format; info bits 0 0: len 8; hex 000000000000000a; asc ;; 1: len 6; hex 000000028e87; asc ;; 2: len 7; hex d20000016b0110; asc k ;; 3: len 8; hex 000000000000000a; asc ;; ---TRANSACTION 167565, ACTIVE 208 sec 2 lock struct(s), heap size 360, 1 row lock(s), undo log entries 1 MySQL thread id 13468, OS thread handle 0x7efe4279c700, query id 396231 110.249.199.168 root TABLE LOCK table `test_db`.`message_entity` trx id 167565 lock mode IX RECORD LOCKS space id 252 page no 3 n bits 72 index `PRIMARY` of table `test_db`.`message_entity` trx id 167565 lock_mode X locks rec but not gap Record lock, heap no 5 PHYSICAL RECORD: n_fields 4; compact format; info bits 0 0: len 8; hex 000000000000001e; asc ;; 1: len 6; hex 000000028e8d; asc ;; 2: len 7; hex d6000001b90110; asc ;; 3: len 8; hex 000000000000001e; asc ;; ---TRANSACTION 167560, ACTIVE 214 sec 2 lock struct(s), heap size 360, 1 row lock(s), undo log entries 1 MySQL thread id 13467, OS thread handle 0x7efe42862700, query id 396223 111.225.144.253 root TABLE LOCK table `test_db`.`message_entity` trx id 167560 lock mode IX RECORD LOCKS space id 252 page no 3 n bits 72 index `PRIMARY` of table `test_db`.`message_entity` trx id 167560 lock_mode X locks rec but not gap Record lock, heap no 3 PHYSICAL RECORD: n_fields 4; compact format; info bits 0 0: len 8; hex 0000000000000014; asc ;; 1: len 6; hex 000000028e88; asc ;; 2: len 7; hex d3000001fe0110; asc ;; 3: len 8; hex 0000000000000014; asc ;; ---TRANSACTION 167559, ACTIVE 217 sec 2 lock struct(s), heap size 360, 1 row lock(s), undo log entries 1 MySQL thread id 13466, OS thread handle 0x7efe3d7e8700, query id 396215 110.249.198.233 root TABLE LOCK table `test_db`.`message_entity` trx id 167559 lock mode IX RECORD LOCKS space id 252 page no 3 n bits 72 index `PRIMARY` of table `test_db`.`message_entity` trx id 167559 lock_mode X locks rec but not gap Record lock, heap no 4 PHYSICAL RECORD: n_fields 4; compact format; info bits 0 0: len 8; hex 000000000000000a; asc ;; 1: len 6; hex 000000028e87; asc ;; 2: len 7; hex d20000016b0110; asc k ;; 3: len 8; hex 000000000000000a; asc ;; -------- FILE I/O -------- I/O thread 0 state: waiting for completed aio requests (insert buffer thread) I/O thread 1 state: waiting for completed aio requests (log thread) I/O thread 2 state: waiting for completed aio requests (read thread) I/O thread 3 state: waiting for completed aio requests (read thread) I/O thread 4 state: waiting for completed aio requests (read thread) I/O thread 5 state: waiting for completed aio requests (read thread) I/O thread 6 state: waiting for completed aio requests (write thread) I/O thread 7 state: waiting for completed aio requests (write thread) I/O thread 8 state: waiting for completed aio requests (write thread) I/O thread 9 state: waiting for completed aio requests (write thread) Pending normal aio reads: 0 [0, 0, 0, 0] , aio writes: 0 [0, 0, 0, 0] , ibuf aio reads: 0, log i/o's: 0, sync i/o's: 0 Pending flushes (fsync) log: 0; buffer pool: 0 680 OS file reads, 38194 OS file writes, 29148 OS fsyncs 0.00 reads/s, 0 avg bytes/read, 0.00 writes/s, 0.00 fsyncs/s ------------------------------------- INSERT BUFFER AND ADAPTIVE HASH INDEX ------------------------------------- Ibuf: size 1, free list len 0, seg size 2, 0 merges merged operations: insert 0, delete mark 0, delete 0 discarded operations: insert 0, delete mark 0, delete 0 Hash table size 276671, node heap has 5 buffer(s) 0.00 hash searches/s, 0.05 non-hash searches/s --- LOG --- Log sequence number 56790432 Log flushed up to 56790432 Pages flushed up to 56790432 Last checkpoint at 56790432 0 pending log writes, 0 pending chkp writes 12721 log i/o's done, 0.00 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total memory allocated 137363456; in additional pool allocated 0 Dictionary memory allocated 239419 Buffer pool size 8191 Free buffers 5692 Database pages 2494 Old database pages 900 Modified db pages 0 Pending reads 0 Pending writes: LRU 0, flush list 0, single page 0 Pages made young 0, not young 0 0.00 youngs/s, 0.00 non-youngs/s Pages read 519, created 1975, written 19297 0.00 reads/s, 0.00 creates/s, 0.00 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 2494, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] -------------- ROW OPERATIONS -------------- 0 queries inside InnoDB, 0 queries in queue 0 read views open inside InnoDB Main thread process no. 1063, id 139630465324800, state: sleeping Number of rows inserted 5073, updated 713, deleted 148, read 1961343 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================ | 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1 row in set (0.18 sec) mysql>