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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2026-05-24 23:30:46 0x5a34 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 25 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 1054 srv_active, 0 srv_shutdown, 1019616 srv_idle
srv_master_thread log flush and writes: 1020670
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 47664
OS WAIT ARRAY INFO: signal count 7081
RW-shared spins 1488, rounds 44362, OS waits 1439
RW-excl spins 37, rounds 572, OS waits 9
RW-sx spins 1, rounds 2, OS waits 0
Spin rounds per wait: 29.81 RW-shared, 15.46 RW-excl, 2.00 RW-sx
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TRANSACTIONS
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Trx id counter 142249
Purge done for trx's n:o < 142249 undo n:o < 0 state: running but idle
History list length 7
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284472460026376, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284472460022168, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284472460017960, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284472460013752, 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
5096 OS file reads, 19322 OS file writes, 10324 OS fsyncs
7.56 reads/s, 16384 avg bytes/read, 22.56 writes/s, 8.80 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)
13.40 hash searches/s, 153.55 non-hash searches/s
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LOG
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Log sequence number 92768272
Log flushed up to 92768272
Pages flushed up to 92752134
Last checkpoint at 92728652
0 pending log flushes, 0 pending chkp writes
6999 log i/o's done, 6.12 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 79616
Buffer pool size 1003
Free buffers 745
Database pages 256
Old database pages 0
Modified db pages 50
Percent of dirty pages(LRU & free pages): 4.990
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 5061, created 291, written 11061
7.56 reads/s, 0.28 creates/s, 15.12 writes/s
Buffer pool hit rate 975 / 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: 256, unzip_LRU len: 0
I/O sum[909]:cur[9], 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=4848, Main thread ID=6232, state: sleeping
Number of rows inserted 0, updated 3039, deleted 0, read 12465
0.00 inserts/s, 4.88 updates/s, 0.00 deletes/s, 12.88 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 1060
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
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END OF INNODB MONITOR OUTPUT
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