Console
Storage engines
InnoDB
Percona-XtraDB, Supports transactions, row-level locking, foreign keys and encryption for tables
[ Variables | Buffer Pool | InnoDB Status ]
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2025-01-13 12:18:29 d30 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 46 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 536 srv_active, 0 srv_shutdown, 5912 srv_idle
srv_master_thread log flush and writes: 6448
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 976
OS WAIT ARRAY INFO: signal count 976
Mutex spin waits 2661, rounds 17605, OS waits 492
RW-shared spins 491, rounds 14721, OS waits 484
RW-excl spins 0, rounds 0, OS waits 0
Spin rounds per wait: 6.62 mutex, 29.98 RW-shared, 0.00 RW-excl
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TRANSACTIONS
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Trx id counter 454666
Purge done for trx's n:o < 454642 undo n:o < 0 state: running but idle
History list length 33
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 0, not started
MySQL thread id 1685, OS thread handle 0xd30, query id 34629 localhost 127.0.0.1 root init
SHOW ENGINE INNODB STATUS
---TRANSACTION 454665, not started
MySQL thread id 1684, OS thread handle 0xd30, query id 34621 localhost 127.0.0.1 pma
---TRANSACTION 444419, not started
MySQL thread id 1, OS thread handle 0xd18, query id 0 Reading from net
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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, 0] , aio writes: 0 [0, 0, 0, 0] ,
ibuf aio reads: 0, log i/o's: 0, sync i/o's: 0
Pending flushes (fsync) log: 0; buffer pool: 0
1651 OS file reads, 4501 OS file writes, 2601 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.09 writes/s, 0.09 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
0.43 hash searches/s, 0.41 non-hash searches/s
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LOG
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Log sequence number 43883207
Log flushed up to 43883207
Pages flushed up to 43883207
Last checkpoint at 43883207
Max checkpoint age 7782360
Checkpoint age target 7539162
Modified age 0
Checkpoint age 0
0 pending log writes, 0 pending chkp writes
1117 log i/o's done, 0.04 log i/o's/second
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BUFFER POOL AND MEMORY
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Total memory allocated 17481728; in additional pool allocated 0
Total memory allocated by read views 568
Internal hash tables (constant factor + variable factor)
Adaptive hash index 297776 (277192 + 20584)
Page hash 18136 (buffer pool 0 only)
Dictionary cache 166640 (70736 + 95904)
File system 835552 (812272 + 23280)
Lock system 43456 (42376 + 1080)
Recovery system 0 (0 + 0)
Dictionary memory allocated 95904
Buffer pool size 1023
Buffer pool size, bytes 16760832
Free buffers 766
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 0, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1612, created 24, written 2866
0.00 reads/s, 0.00 creates/s, 0.02 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[1]: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
0 RW transactions active inside InnoDB
0 RO transactions active inside InnoDB
0 out of 1000 descriptors used
Main thread id 17872, state: sleeping
Number of rows inserted 0, updated 594, deleted 0, read 9235
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.70 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 4
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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