Storage engines
InnoDB
Percona-XtraDB, Supports transactions, row-level locking, foreign keys and encryption for tables
[
Variabel
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Penampungan Penyangga
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Status InnoDB
]
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2026-11-06 18:50:52 1d24 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 7 seconds
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BACKGROUND THREAD
-----------------
srv_master_thread loops: 3986 srv_active, 0 srv_shutdown, 873994 srv_idle
srv_master_thread log flush and writes: 877980
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 17857
OS WAIT ARRAY INFO: signal count 18046
Mutex spin waits 480423, rounds 444736, OS waits 6979
RW-shared spins 28455, rounds 452043, OS waits 10776
RW-excl spins 104, rounds 1610, OS waits 33
Spin rounds per wait: 0.93 mutex, 15.89 RW-shared, 15.48 RW-excl
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TRANSACTIONS
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Trx id counter 21235198
Purge done for trx's n:o < 21235197 undo n:o < 0 state: running but idle
History list length 9
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 0, not started
MySQL thread id 29948, OS thread handle 0x1d24, query id 907832 localhost 127.0.0.1 root init
SHOW ENGINE INNODB STATUS
---TRANSACTION 21235197, not started
MySQL thread id 29947, OS thread handle 0x1d24, query id 907827 localhost 127.0.0.1 pma
---TRANSACTION 20527363, not started
MySQL thread id 1, OS thread handle 0x8b4, query id 0 Waiting for requests
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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
1004867 OS file reads, 45440 OS file writes, 30135 OS fsyncs
0.43 reads/s, 16384 avg bytes/read, 1.71 writes/s, 1.43 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, 44 merges
merged operations:
insert 42, delete mark 3, delete 1
discarded operations:
insert 0, delete mark 0, delete 0
0.43 hash searches/s, 1.71 non-hash searches/s
---
LOG
---
Log sequence number 131671058
Log flushed up to 131671058
Pages flushed up to 131671058
Last checkpoint at 131671058
Max checkpoint age 7782360
Checkpoint age target 7539162
Modified age 0
Checkpoint age 0
0 pending log writes, 0 pending chkp writes
13346 log i/o's done, 0.57 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total memory allocated 17203200; in additional pool allocated 0
Total memory allocated by read views 14512
Internal hash tables (constant factor + variable factor)
Adaptive hash index 297300 (276764 + 20536)
Page hash 9068 (buffer pool 0 only)
Dictionary cache 347920 (69928 + 277992)
File system 478520 (406136 + 72384)
Lock system 22124 (21188 + 936)
Recovery system 0 (0 + 0)
Dictionary memory allocated 277992
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 7157, not young 4198063
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1004445, created 249, written 25677
0.43 reads/s, 0.00 creates/s, 0.86 writes/s
Buffer pool hit rate 941 / 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[188]: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 8260, state: sleeping
Number of rows inserted 1097, updated 3935, deleted 152, read 1451583737
0.00 inserts/s, 0.29 updates/s, 0.00 deletes/s, 0.71 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 35
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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