mysql> show engine innodb status\G;

*************************** 1. row ***************************

?Type: InnoDB

?Name:

Status:

=====================================

131221 20:59:50 INNODB MONITOR OUTPUT

=====================================

Per second averages calculated from the last 5 seconds

最近5秒估算出的每秒的值：

-----------------

BACKGROUND THREAD

-----------------

master進程：

srv_master_thread loops: 1 1_second, 1 sleeps, 0 10_second, 1 background, 1 flush

?????????????1次1秒執行循環，1次睡眠，0次10秒循環，1次后臺循環，1次刷新

srv_master_thread log flush and writes: 1

?????????日志刷新和寫 1次

----------

SEMAPHORES

• n. 信號；[計] 信號量；旗語；信號燈（semaphore的復數）

• v. 用信號向…發出；打旗語（semaphore的三單形式）

----------

OS WAIT ARRAY INFO: reservation count 2, signal count 2

Mutex spin waits 2, rounds 44, OS waits 0

RW-shared spins 2, rounds 60, OS waits 2

RW-excl spins 0, rounds 0, OS waits 0

Spin rounds per wait: 22.00 mutex, 30.00 RW-shared, 0.00 RW-excl

------------

TRANSACTIONS

------------

Trx id counter D600

Purge done for trx's n:o < D210 undo n:o < 0

History list length 872

LIST OF TRANSACTIONS FOR EACH SESSION:

---TRANSACTION 0, not started

MySQL thread id 1, OS thread handle 0x1254, query id 9 localhost root

show engine innodb status

--------

FILE I/O

--------

I/O thread 0 state: wait Windows aio (insert buffer thread)

I/O thread 1 state: wait Windows aio (log thread)

I/O thread 2 state: wait Windows aio (read thread)

I/O thread 3 state: wait Windows aio (read thread)

I/O thread 4 state: wait Windows aio (read thread)

I/O thread 5 state: wait Windows aio (read thread)

I/O thread 6 state: wait Windows aio (write thread)

I/O thread 7 state: wait Windows aio (write thread)

I/O thread 8 state: wait Windows aio (write thread)

I/O thread 9 state: wait Windows aio (write thread)

Pending normal aio reads: 0 [0, 0, 0, 0] , aio writes: 0 [0, 0, 0, 0] ,

?ibuf aio reads: 0, log i/o's: 0, sync i/o's: 0

Pending flushes (fsync) log: 0; buffer pool: 0

470 OS file reads, 3 OS file writes, 3 OS fsyncs

0.00 reads/s, 0 avg bytes/read, 0.00 writes/s, 0.00 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 1398769, node heap has 1 buffer(s)

0.00 hash searches/s, 0.00 non-hash searches/s

---

LOG

---

Log sequence number 453052081

Log flushed up to ?453052081

Last checkpoint at ?453052081

0 pending log writes, 0 pending chkp writes

8 log i/o's done, 0.00 log i/o's/second

----------------------

BUFFER POOL AND MEMORY

----------------------

Total memory allocated 358039552; in additional pool allocated 0

Dictionary memory allocated 20114

Buffer pool size ?21568

Free buffers ???21109

Database pages ??458

Old database pages 0

Modified db pages ?0

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 458, created 0, written 0

0.00 reads/s, 0.00 creates/s, 0.00 writes/s

No buffer pool page gets since the last printout

Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s

LRU len: 458, unzip_LRU len: 0

I/O sum[0]:cur[0], unzip sum[0]:cur[0]

--------------

ROW OPERATIONS

--------------

0 queries inside InnoDB, 0 queries in queue

1 read views open inside InnoDB

Main thread id 2072, state: waiting for server activity

Number of rows inserted 0, updated 0, deleted 0, read 0

0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s

----------------------------

END OF INNODB MONITOR OUTPUT

============================

1 row in set (0.00 sec)

ERROR:

No query specified

mysql>

轉載于:https://blog.51cto.com/shouhouzhe/1376790

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