Storage engines
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
[
Variables
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Buffer Pool
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InnoDB Status
]
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2025-09-13 15:05:00 0x20c0 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 38 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 62339 srv_active, 0 srv_shutdown, 1581831 srv_idle
srv_master_thread log flush and writes: 1644170
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 1431395
OS WAIT ARRAY INFO: signal count 1084856
RW-shared spins 1062806, rounds 25159409, OS waits 694496
RW-excl spins 529347, rounds 1657160, OS waits 24438
RW-sx spins 22711, rounds 194310, OS waits 3432
Spin rounds per wait: 23.67 RW-shared, 3.13 RW-excl, 8.56 RW-sx
------------------------
LATEST FOREIGN KEY ERROR
------------------------
2025-09-10 10:51:09 0x1e3c Transaction:
TRANSACTION 31554573, ACTIVE 0 sec inserting
mysql tables in use 1, locked 1
3 lock struct(s), heap size 1128, 1 row lock(s), undo log entries 1
MySQL thread id 237030, OS thread handle 7740, query id 8533203 CLOUD-PJCQRPUIU 45.58.43.18 freeluma Update
INSERT INTO ticket_messages
(ticket_id, direction, message_type, author_name, author_email, body_text, body_html, created_at)
VALUES
('3083', 'inbound', 'email', '', 'staciturner41@yahoo.com', 'Good afternoon, \nJustin curious if my order has shipped yet? \n\nThank you \nStaci Turner \nSent from my iPhone', '<html><head><meta http-equiv=\"content-type\" content=\"text/html; charset=utf-8\"></head><body dir=\"auto\">Good afternoon, <div>Justin curious if my order has shipped yet? </div><div><br></div><div>Thank you </div><div>Staci
Foreign key constraint fails for table `customersupport`.`ticket_messages`:
,
CONSTRAINT `ticket_messages_ibfk_1` FOREIGN KEY (`ticket_id`) REFERENCES `tickets` (`id`) ON DELETE CASCADE in parent table, in index idx_tm_ticket tuple:
DATA TUPLE: 3 fields;
0: len 8; hex 0000000000000c0b; asc ;;
1: len 4; hex 68c1ba8d; asc h ;;
2: len 8; hex 0000000000009a82; asc ;;
But in parent table `customersupport`.`tickets`, in index PRIMARY,
the closest match we can find is record:
PHYSICAL RECORD: n_fields 23; compact format; info bits 0
0: len 8; hex 00000000000024ca; asc $ ;;
1: len 6; hex 000000000000; asc ;;
2: len 7; hex 80000000000000; asc ;;
3: len 8; hex 0000000000000002; asc ;;
4: len 30; hex 7777772e656c6567616e74657465726e6974792e636f6d2053454f205072; asc www.eleganteternity.com SEO Pr; (total 48 bytes);
5: len 0; hex ; asc ;;
6: len 17; hex 696e666f406f637461626c697a2e6e6574; asc info@octabliz.net;;
7: SQL NULL;
8: len 1; hex 03; asc ;;
9: len 1; hex 02; asc ;;
10: SQL NULL;
11: SQL NULL;
12: SQL NULL;
13: SQL NULL;
14: SQL NULL;
15: SQL NULL;
16: len 1; hex 01; asc ;;
17: SQL NULL;
18: len 4; hex 68ad8ccd; asc h ;;
19: len 4; hex 68ada017; asc h ;;
20: SQL NULL;
21: len 15; hex 47656e6572616c20496e7175697279; asc General Inquiry;;
22: len 30; hex 43555252454e54205449434b455420e280942041206d61726b6574696e67; asc CURRENT TICKET A marketing; (total 272 bytes);
------------
TRANSACTIONS
------------
Trx id counter 31572458
Purge done for trx's n:o < 31572458 undo n:o < 0 state: running but idle
History list length 3
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283676628537848, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283676628529512, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283676628521176, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283676628533680, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283676628525344, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283676628517008, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
--------
FILE I/O
--------
I/O thread 0 state: native aio handle (insert buffer thread)
I/O thread 1 state: native aio handle (log thread)
I/O thread 2 state: native aio handle (read thread)
I/O thread 3 state: native aio handle (read thread)
I/O thread 4 state: native aio handle (read thread)
I/O thread 5 state: native aio handle (read thread)
I/O thread 6 state: native aio handle (write thread)
I/O thread 7 state: native aio handle (write thread)
I/O thread 8 state: native aio handle (write thread)
I/O thread 9 state: native aio handle (write thread)
Pending normal aio reads: [0, 0, 0, 0] , aio writes: [0, 0, 0, 0] ,
ibuf aio reads:, log i/o's:, sync i/o's:
Pending flushes (fsync) log: 0; buffer pool: 0
62497048 OS file reads, 2304930 OS file writes, 946432 OS fsyncs
2.34 reads/s, 16384 avg bytes/read, 1.42 writes/s, 1.24 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 390, seg size 392, 5402 merges
merged operations:
insert 28825, delete mark 456241, delete 13217
discarded operations:
insert 0, delete mark 0, delete 0
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
3.97 hash searches/s, 9.37 non-hash searches/s
---
LOG
---
Log sequence number 4279311933
Log flushed up to 4279311913
Pages flushed up to 4279274095
Last checkpoint at 4279273894
0 pending log flushes, 0 pending chkp writes
579958 log i/o's done, 0.95 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 440704
Buffer pool size 1003
Free buffers 735
Database pages 260
Old database pages 0
Modified db pages 75
Percent of dirty pages(LRU & free pages): 7.530
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 12631962, not young 504387758
0.00 youngs/s, 0.00 non-youngs/s
Pages read 62496888, created 24182, written 1580141
2.34 reads/s, 0.08 creates/s, 0.34 writes/s
Buffer pool hit rate 984 / 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: 260, unzip_LRU len: 0
I/O sum[97]:cur[5], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=15956, Main thread ID=15356, state: sleeping
Number of rows inserted 221114, updated 90444, deleted 202038, read 8665814262
0.00 inserts/s, 0.74 updates/s, 0.00 deletes/s, 981.84 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 135008
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================
