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Inniostat – InnoDB IO Statistics

2009年5月31日 谭俊青 发表评论 阅读评论

原文：http://blogs.sun.com/realneel/entry/inniostat_innodb_io_statistics

文中工具用到solaris下的dtrace数据，因此linux下不能使用.

例子：

#./inniostat -h
Usage: inniostat [-h] [-d] [-p pid] [interval]
                 -h : Print this message
                 -p : MySQL PID
                 -d : Dump dtrace script being used

# ./inniostat
 __physical__  ___Innodb___ ____read____     ______write______
   r/s    w/s    r/s    w/s   data    pre    log dblbuf dflush     Time
    24    121     24     50     24      0     50      0      0 16:00:57
    26    130     26     51     26      0     51      0      0 16:00:58
    18    134     18     54     18      0     54      0      0 16:00:59
    25    129     25     51     25      0     51      0      0 16:01:00
    29    116     46     47     17     29     47      0      0 16:01:01
    10    140     10    132     10      0     52      0     80 16:01:02
    29    129     35     53     14     21     53      0      0 16:01:03
Col Description
r/s Physical (Actual) reads per sec
w/s Physical (Actual) writes per sec
r/s Reads issued by Innodb per sec
w/s Writes issued by Innodb per sec
data Regular Reads issued by Innodb to the datafiles per sec
pre Prefetch Reads issued by Innodb to the datafiles per sec
log Log writes issued by Innodb per sec
dblbuf Double buffer writes per sec
dflush Writes due to flushing of Innodb buffers to disk.
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