Storage engines

InnoDB

Supports transactions, row-level locking, foreign keys and encryption for tables

[ Variables | Buffer Pool | InnoDB Status ]

=====================================
2024-10-06 11:30:06 0x1bcc INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 18 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 2487 srv_active, 0 srv_shutdown, 99038 srv_idle
srv_master_thread log flush and writes: 101525
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 55037
OS WAIT ARRAY INFO: signal count 30287
RW-shared spins 48179, rounds 1028420, OS waits 18422
RW-excl spins 5916, rounds 76619, OS waits 1293
RW-sx spins 114, rounds 2367, OS waits 53
Spin rounds per wait: 21.35 RW-shared, 12.95 RW-excl, 20.76 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 1631071
Purge done for trx's n:o < 1631071 undo n:o < 0 state: running
History list length 4
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 282913761940488, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761894552, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761957192, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761944664, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761936312, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761932136, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761915432, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761911256, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761898728, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761948840, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761927960, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761923784, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761919608, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761969720, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761907080, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761902904, 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
960344 OS file reads, 68683 OS file writes, 31937 OS fsyncs
18.17 reads/s, 16384 avg bytes/read, 0.11 writes/s, 0.11 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 248, seg size 250, 12624 merges
merged operations:
 insert 22588, delete mark 1942, delete 878
discarded operations:
 insert 0, delete mark 0, delete 0
Hash table size 4441, node heap has 21 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 10 buffer(s)
Hash table size 4441, node heap has 19 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
725.90 hash searches/s, 95.38 non-hash searches/s
---
LOG
---
Log sequence number 2205280638
Log flushed up to   2205280638
Pages flushed up to 2205280638
Last checkpoint at  2205280629
0 pending log flushes, 0 pending chkp writes
16538 log i/o's done, 0.11 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 2398832
Buffer pool size   1003
Free buffers       367
Database pages     581
Old database pages 233
Modified db pages  0
Percent of dirty pages(LRU & free pages): 0.000
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 213655, not young 55131618
0.11 youngs/s, 774.12 non-youngs/s
Pages read 959380, created 495, written 48091
18.17 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 993 / 1000, young-making rate 0 / 1000 not 291 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 581, unzip_LRU len: 0
I/O sum[667]:cur[0], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=4552, Main thread ID=4492, state: sleeping
Number of rows inserted 15161, updated 1277, deleted 352, read 202119394
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 2564.14 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 39009
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================