Storage engines

InnoDB

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

[ Variabel | Penampungan Penyangga | Status InnoDB ]

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2026-10-11 08:45:28 0x772d4b3666c0 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 18 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 7487 srv_active, 0 srv_shutdown, 2504225 srv_idle
srv_master_thread log flush and writes: 2511654
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SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 91483
OS WAIT ARRAY INFO: signal count 100136
RW-shared spins 84236, rounds 1747155, OS waits 46556
RW-excl spins 122788, rounds 771709, OS waits 6157
RW-sx spins 1981, rounds 54037, OS waits 1053
Spin rounds per wait: 20.74 RW-shared, 6.28 RW-excl, 27.28 RW-sx
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TRANSACTIONS
------------
Trx id counter 488801
Purge done for trx's n:o < 488801 undo n:o < 0 state: running but idle
History list length 6
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 412511396476584, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 412511396472368, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 412511396468152, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 412511396463936, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 412511396459720, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 412511396455504, not started
mysql tables in use 1, locked 0
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 412511396451288, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 412511396447072, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 412511396442856, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 412511396438640, not started flushing log
mysql tables in use 1, locked 1
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 412511396434424, not started flushing log
mysql tables in use 1, locked 1
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 412511396430208, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 412511396425992, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 412511396421776, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
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FILE I/O
--------
I/O thread 0 state: waiting for i/o request (insert buffer thread)
I/O thread 1 state: waiting for i/o request (log thread)
I/O thread 2 state: waiting for i/o request (read thread)
I/O thread 3 state: waiting for i/o request (read thread)
I/O thread 4 state: waiting for i/o request (read thread)
I/O thread 5 state: waiting for i/o request (read thread)
I/O thread 6 state: waiting for i/o request (write thread)
I/O thread 7 state: waiting for i/o request (write thread)
I/O thread 8 state: waiting for i/o request (write thread)
I/O thread 9 state: waiting for i/o request (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: 1; buffer pool: 0
2177534 OS file reads, 197978 OS file writes, 59671 OS fsyncs
3.89 reads/s, 16384 avg bytes/read, 4.22 writes/s, 2.17 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 12, seg size 14, 21064 merges
merged operations:
 insert 87054, delete mark 1727, delete 258
discarded operations:
 insert 0, delete mark 0, delete 0
Hash table size 4441, node heap has 0 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 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
28.00 hash searches/s, 85.94 non-hash searches/s
---
LOG
---
Log sequence number 14286385529
Log flushed up to   14286382881
Pages flushed up to 14286364890
Last checkpoint at  14286364837
1 pending log flushes, 0 pending chkp writes
30222 log i/o's done, 1.39 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 92720
Buffer pool size   1003
Free buffers       739
Database pages     258
Old database pages 0
Modified db pages  41
Percent of dirty pages(LRU & free pages): 4.108
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 151912, not young 92747607
0.00 youngs/s, 0.00 non-youngs/s
Pages read 2177493, created 2687, written 156190
3.89 reads/s, 0.00 creates/s, 2.50 writes/s
Buffer pool hit rate 981 / 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: 258, unzip_LRU len: 0
I/O sum[201]:cur[2], unzip sum[0]:cur[0]
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ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=900376, Main thread ID=131035417274048, state: sleeping
Number of rows inserted 56614, updated 255984, deleted 762, read 305527335
0.00 inserts/s, 1.39 updates/s, 0.00 deletes/s, 42.33 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 15207
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 12.17 reads/s
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END OF INNODB MONITOR OUTPUT
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