Storage engines

InnoDB

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

[ Variables | Buffer Pool | InnoDB Status ]

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2024-08-02 11:03:10 0x4ac INNODB MONITOR OUTPUT
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Per second averages calculated from the last 48 seconds
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BACKGROUND THREAD
-----------------
srv_master_thread loops: 603507 srv_active, 0 srv_shutdown, 3851645 srv_idle
srv_master_thread log flush and writes: 4455152
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 16960116
OS WAIT ARRAY INFO: signal count 46706294
RW-shared spins 63684432, rounds 368533425, OS waits 4711202
RW-excl spins 163904460, rounds 627769505, OS waits 4538007
RW-sx spins 6946439, rounds 11154519, OS waits 182476
Spin rounds per wait: 5.79 RW-shared, 3.83 RW-excl, 1.61 RW-sx
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TRANSACTIONS
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Trx id counter 10082954
Purge done for trx's n:o < 10082954 undo n:o < 0 state: running but idle
History list length 14
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283434097111352, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283434097107176, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283434097103000, 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
161387169 OS file reads, 193656715 OS file writes, 10985153 OS fsyncs
0.71 reads/s, 16384 avg bytes/read, 0.81 writes/s, 0.67 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
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Ibuf: size 1, free list len 332, seg size 334, 27667429 merges
merged operations:
 insert 520532064, delete mark 793, 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 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 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)
0.12 hash searches/s, 0.92 non-hash searches/s
---
LOG
---
Log sequence number 1906017935320
Log flushed up to   1906017935320
Pages flushed up to 1906017935320
Last checkpoint at  1906017935311
0 pending log flushes, 0 pending chkp writes
3987001 log i/o's done, 0.42 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 267928
Buffer pool size   1003
Free buffers       736
Database pages     261
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 17990450, not young 2042455732
0.00 youngs/s, 0.00 non-youngs/s
Pages read 161387059, created 12529536, written 185686894
0.71 reads/s, 0.00 creates/s, 0.31 writes/s
Buffer pool hit rate 816 / 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: 261, unzip_LRU len: 0
I/O sum[49]: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=7152, Main thread ID=3012, state: sleeping
Number of rows inserted 793025816, updated 5682, deleted 318212, read 2190955725
0.06 inserts/s, 0.02 updates/s, 0.00 deletes/s, 0.79 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 6448
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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