Storage engines

InnoDB

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

[ Variables | Buffer Pool | InnoDB Status ]

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2025-05-14 19:27:40 0x7fd6a3c526c0 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 10 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 41095 srv_active, 0 srv_shutdown, 579775 srv_idle
srv_master_thread log flush and writes: 620861
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 430805
OS WAIT ARRAY INFO: signal count 188231
RW-shared spins 57989, rounds 1735590, OS waits 57796
RW-excl spins 799, rounds 8251, OS waits 119
RW-sx spins 105, rounds 2291, OS waits 46
Spin rounds per wait: 29.93 RW-shared, 10.33 RW-excl, 21.82 RW-sx
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TRANSACTIONS
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Trx id counter 138019
Purge done for trx's n:o < 138019 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 422034540601608, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 422034540597392, 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: 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: 0; buffer pool: 0
102840 OS file reads, 496876 OS file writes, 365679 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.00 writes/s, 0.00 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, 17 merges
merged operations:
 insert 15, delete mark 15, delete 5
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)
4.50 hash searches/s, 15.20 non-hash searches/s
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LOG
---
Log sequence number 609596669
Log flushed up to   609596669
Pages flushed up to 609596669
Last checkpoint at  609596660
0 pending log flushes, 0 pending chkp writes
213563 log i/o's done, 0.00 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 80520
Buffer pool size   1003
Free buffers       739
Database pages     256
Old database pages 0
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 666, not young 8942
0.00 youngs/s, 0.00 non-youngs/s
Pages read 102767, created 2189, written 227524
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 1000 / 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[12]:cur[0], 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=368546, Main thread ID=140559136065216, state: sleeping
Number of rows inserted 335, updated 43929, deleted 283, read 3425020
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 4.50 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 17793
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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