Motori di memorizzazione

InnoDB

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

[ Variabili | Buffer Pool | Stato InnoDB ]

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2026-04-23 16:45:19 0x2edc INNODB MONITOR OUTPUT
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Per second averages calculated from the last 32 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 893 srv_active, 0 srv_shutdown, 420144 srv_idle
srv_master_thread log flush and writes: 421037
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 38313
OS WAIT ARRAY INFO: signal count 6521
RW-shared spins 1896, rounds 55946, OS waits 1806
RW-excl spins 251, rounds 6639, OS waits 193
RW-sx spins 2, rounds 60, OS waits 2
Spin rounds per wait: 29.51 RW-shared, 26.45 RW-excl, 30.00 RW-sx
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TRANSACTIONS
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Trx id counter 881419
Purge done for trx's n:o < 881419 undo n:o < 0 state: running
History list length 5
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283653736263968, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283653736259800, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283653736255632, 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: 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
10343 OS file reads, 16244 OS file writes, 8053 OS fsyncs
0.03 reads/s, 16384 avg bytes/read, 0.03 writes/s, 0.03 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 143, seg size 145, 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 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 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 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
0.37 hash searches/s, 0.53 non-hash searches/s
---
LOG
---
Log sequence number 1278829781
Log flushed up to   1278829761
Pages flushed up to 1278828498
Last checkpoint at  1278828489
0 pending log flushes, 0 pending chkp writes
4988 log i/o's done, 0.03 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 518328
Buffer pool size   1003
Free buffers       739
Database pages     257
Old database pages 0
Modified db pages  3
Percent of dirty pages(LRU & free pages): 0.301
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 58, not young 9169
0.00 youngs/s, 0.00 non-youngs/s
Pages read 10127, created 320, written 9892
0.03 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 980 / 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: 257, unzip_LRU len: 0
I/O sum[0]:cur[1], 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=3124, Main thread ID=4516, state: sleeping
Number of rows inserted 0, updated 3398, deleted 0, read 371295
0.00 inserts/s, 0.03 updates/s, 0.00 deletes/s, 0.41 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 9437
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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