Μηχανές αποθήκευσης

InnoDB

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

[ Μεταβλητές | Buffer Pool | Κατάσταση InnoDB ]

=====================================
2026-08-04 17:16:05 0x1a28 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 36 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 8107 srv_active, 0 srv_shutdown, 75058 srv_idle
srv_master_thread log flush and writes: 83165
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 138802
OS WAIT ARRAY INFO: signal count 12855
RW-shared spins 2637, rounds 78810, OS waits 2328
RW-excl spins 86, rounds 2656, OS waits 79
RW-sx spins 1, rounds 30, OS waits 1
Spin rounds per wait: 29.89 RW-shared, 30.88 RW-excl, 30.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 29990
Purge done for trx's n:o < 29990 undo n:o < 0 state: running
History list length 45
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284270503330512, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284270503322176, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284270503301336, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284270503326344, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284270503318008, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284270503297168, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284270503313840, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284270503309672, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284270503305504, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
--------
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
25966 OS file reads, 88779 OS file writes, 50310 OS fsyncs
3.83 reads/s, 16384 avg bytes/read, 6.94 writes/s, 3.78 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
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 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)
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)
10.72 hash searches/s, 27.14 non-hash searches/s
---
LOG
---
Log sequence number 17171481
Log flushed up to   17171481
Pages flushed up to 17147145
Last checkpoint at  17147145
0 pending log flushes, 0 pending chkp writes
25284 log i/o's done, 2.33 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 105168
Buffer pool size   1003
Free buffers       732
Database pages     266
Old database pages 0
Modified db pages  40
Percent of dirty pages(LRU & free pages): 4.004
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 25918, created 587, written 54640
3.83 reads/s, 0.22 creates/s, 3.89 writes/s
Buffer pool hit rate 956 / 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: 266, unzip_LRU len: 0
I/O sum[509]:cur[9], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=3156, Main thread ID=3344, state: sleeping
Number of rows inserted 78, updated 12136, deleted 0, read 21976322
0.00 inserts/s, 1.97 updates/s, 0.00 deletes/s, 76.78 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 14268
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================