ストレージエンジン
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
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変数
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バッファプール
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InnoDB ステータス
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2026-02-16 19:25:06 0xa48 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 56 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 182 srv_active, 0 srv_shutdown, 607079 srv_idle
srv_master_thread log flush and writes: 607261
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 2988
OS WAIT ARRAY INFO: signal count 55
RW-shared spins 113, rounds 3355, OS waits 55
RW-excl spins 5, rounds 150, OS waits 0
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 29.69 RW-shared, 30.00 RW-excl, 0.00 RW-sx
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TRANSACTIONS
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Trx id counter 42513
Purge done for trx's n:o < 42513 undo n:o < 0 state: running
History list length 8
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283311632409152, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283311632404984, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283311632396648, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283311632392480, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283311632388312, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283311632384144, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283311632400816, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
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FILE I/O
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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
1479 OS file reads, 3484 OS file writes, 1362 OS fsyncs
2.84 reads/s, 16384 avg bytes/read, 6.20 writes/s, 2.50 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
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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 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
6.73 hash searches/s, 20.91 non-hash searches/s
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LOG
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Log sequence number 22430469
Log flushed up to 22430469
Pages flushed up to 22421834
Last checkpoint at 22421492
0 pending log flushes, 0 pending chkp writes
808 log i/o's done, 1.27 log i/o's/second
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BUFFER POOL AND MEMORY
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Total large memory allocated 33554432
Dictionary memory allocated 82632
Buffer pool size 1003
Free buffers 808
Database pages 193
Old database pages 0
Modified db pages 104
Percent of dirty pages(LRU & free pages): 10.379
Max dirty pages percent: 75.000
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 1442, created 146, written 2467
2.84 reads/s, 0.00 creates/s, 4.96 writes/s
Buffer pool hit rate 947 / 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: 193, unzip_LRU len: 0
I/O sum[385]:cur[11], unzip sum[0]:cur[0]
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ROW OPERATIONS
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0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=5432, Main thread ID=5152, state: making checkpoint
Number of rows inserted 0, updated 581, deleted 0, read 6205
0.00 inserts/s, 0.86 updates/s, 0.00 deletes/s, 7.07 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 312
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.75 reads/s
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END OF INNODB MONITOR OUTPUT
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