Storage engines

InnoDB

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

[ Variables | Buffer Pool | InnoDB Status ]

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2024-10-06 09:39:19 0x1410 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 1 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 2400 srv_active, 0 srv_shutdown, 92481 srv_idle
srv_master_thread log flush and writes: 94881
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SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 53392
OS WAIT ARRAY INFO: signal count 29483
RW-shared spins 47299, rounds 1011514, OS waits 18065
RW-excl spins 5746, rounds 74589, OS waits 1258
RW-sx spins 113, rounds 2337, OS waits 52
Spin rounds per wait: 21.39 RW-shared, 12.98 RW-excl, 20.68 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 1630772
Purge done for trx's n:o < 1630772 undo n:o < 0 state: running
History list length 3
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 282913761911256, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761898728, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761965544, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761948840, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761894552, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761961368, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761957192, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761953016, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761940488, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761936312, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761927960, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761923784, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761919608, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761969720, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761907080, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282913761902904, 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
933601 OS file reads, 66069 OS file writes, 30587 OS fsyncs
1.00 reads/s, 16384 avg bytes/read, 9.99 writes/s, 6.99 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 248, seg size 250, 12098 merges
merged operations:
 insert 21855, delete mark 1923, delete 866
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 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 2 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
5.99 hash searches/s, 9.99 non-hash searches/s
---
LOG
---
Log sequence number 2204990089
Log flushed up to   2204990089
Pages flushed up to 2204990089
Last checkpoint at  2204987715
0 pending log flushes, 0 pending chkp writes
15876 log i/o's done, 4.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 2398832
Buffer pool size   1003
Free buffers       739
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 206844, not young 53512739
0.00 youngs/s, 0.00 non-youngs/s
Pages read 932637, created 485, written 46299
1.00 reads/s, 0.00 creates/s, 5.00 writes/s
Buffer pool hit rate 968 / 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[700]:cur[5], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=4552, Main thread ID=4492, state: sleeping
Number of rows inserted 14617, updated 1215, deleted 352, read 196875610
0.00 inserts/s, 1.00 updates/s, 0.00 deletes/s, 4.00 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 39009
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================