Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variabel | Penampungan Penyangga | Status InnoDB ]

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2026-04-02 12:20:14 0x7f3707cb7700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 22 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 43 srv_active, 0 srv_shutdown, 223 srv_idle
srv_master_thread log flush and writes: 0
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 360
OS WAIT ARRAY INFO: signal count 342
RW-shared spins 72, rounds 133, OS waits 61
RW-excl spins 242, rounds 1517, OS waits 21
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 1.85 RW-shared, 6.27 RW-excl, 0.00 RW-sx
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TRANSACTIONS
------------
Trx id counter 10214
Purge done for trx's n:o < 10212 undo n:o < 0 state: running but idle
History list length 5
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421350776801896, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421350776801024, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
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FILE I/O
--------
I/O thread 0 state: waiting for completed aio requests (insert buffer thread)
I/O thread 1 state: waiting for completed aio requests (log thread)
I/O thread 2 state: waiting for completed aio requests (read thread)
I/O thread 3 state: waiting for completed aio requests (read thread)
I/O thread 4 state: waiting for completed aio requests (read thread)
I/O thread 5 state: waiting for completed aio requests (read thread)
I/O thread 6 state: waiting for completed aio requests (write thread)
I/O thread 7 state: waiting for completed aio requests (write thread)
I/O thread 8 state: waiting for completed aio requests (write thread)
I/O thread 9 state: waiting for completed aio requests (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
1302 OS file reads, 2867 OS file writes, 918 OS fsyncs
0.05 reads/s, 16384 avg bytes/read, 0.77 writes/s, 0.68 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 34679, node heap has 1 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 5 buffer(s)
Hash table size 34679, node heap has 3 buffer(s)
Hash table size 34679, node heap has 3 buffer(s)
Hash table size 34679, node heap has 8 buffer(s)
3692.24 hash searches/s, 2812.78 non-hash searches/s
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LOG
---
Log sequence number          52166476
Log buffer assigned up to    52166476
Log buffer completed up to   52166476
Log written up to            52166476
Log flushed up to            52166476
Added dirty pages up to      52166476
Pages flushed up to          52166476
Last checkpoint at           52166476
1355 log i/o's done, 0.26 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 493841
Buffer pool size   8192
Free buffers       6809
Database pages     1357
Old database pages 519
Modified db pages  0
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 4, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1171, created 186, written 1351
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: 1357, unzip_LRU len: 0
I/O sum[0]: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=368, Main thread ID=139875292751616 , state=sleeping
Number of rows inserted 169, updated 1818, deleted 1546, read 831721
0.05 inserts/s, 0.05 updates/s, 0.00 deletes/s, 4668.11 reads/s
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END OF INNODB MONITOR OUTPUT
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