Speicher-Engines

InnoDB

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

[ Variablen | Puffer-Pool | InnoDB-Status ]

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2026-03-30 18:48:16 0x7c90347e56c0 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 31 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 5141 srv_active, 0 srv_shutdown, 3520738 srv_idle
srv_master_thread log flush and writes: 3525796
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 1290
OS WAIT ARRAY INFO: signal count 1205
RW-shared spins 1273, rounds 35963, OS waits 1082
RW-excl spins 35, rounds 286, OS waits 6
RW-sx spins 1, rounds 1, OS waits 0
Spin rounds per wait: 28.25 RW-shared, 8.17 RW-excl, 1.00 RW-sx
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TRANSACTIONS
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Trx id counter 30956
Purge done for trx's n:o < 30956 undo n:o < 0 state: running
History list length 1
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 418433775489768, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 418433775485552, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 418433775481336, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 418433775477120, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 418433775472904, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 418433775468688, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
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FILE I/O
--------
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
10486 OS file reads, 71301 OS file writes, 36776 OS fsyncs
2.35 reads/s, 16384 avg bytes/read, 4.97 writes/s, 2.19 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 4441, node heap has 0 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 0 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
6.71 hash searches/s, 15.26 non-hash searches/s
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LOG
---
Log sequence number 13644374
Log flushed up to   13644374
Pages flushed up to 13644374
Last checkpoint at  13644365
0 pending log flushes, 0 pending chkp writes
18587 log i/o's done, 1.58 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 80520
Buffer pool size   1003
Free buffers       744
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 10449, created 452, written 46267
2.25 reads/s, 0.06 creates/s, 5.94 writes/s
Buffer pool hit rate 971 / 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[345]: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=295, Main thread ID=136957732558528, state: sleeping
Number of rows inserted 56, updated 10888, deleted 0, read 210952
0.00 inserts/s, 1.23 updates/s, 0.00 deletes/s, 6.55 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 8865
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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