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我的博客已迁移到xdoujiang.com请去那边和我交流
1台机器IO一直很高，之前先加了内存 然后开发那边也已经减少日志输出
仍然很高，最后使用smartctl命令查询了硬盘的相关状态，最后更换硬盘后，问题解决
一、基础环境
1、发行版本
cat
/etc/debian_version
5.0.2
2、内核
uname
-r
2.6.18-6-amd64
3、机型
dmidecode -s system-product-name
PowerEdge R410
二、使用smartctl命令
1、查看当前整体健康状态
1)smartctl -H
/dev/sda
smartctl 5.41 2011-06-09 r3365 [x86_64-linux-3.2.0-4-amd64] (
local
build)
Copyright (C) 2002-11 by Bruce Allen, http:
//smartmontools
.sourceforge.net
SMART Health Status: OK
2)参数说明
-H, --health Check: Ask the device to report its SMART health status or pending TapeAlert messages.
2、打开或关闭
/dev/sda
的SMART功能
smartctl -s on
/off
/dev/sda
3、表示开启smart特性并查看硬盘全部信息
smartctl -s on -a
/dev/sda
smartctl version 5.38 [x86_64-unknown-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http:
//smartmontools
.sourceforge.net/
Device: SEAGATE ST9300603SS Version: FS62
Serial number: 3SE22PBD
Device
type
: disk
Transport protocol: SAS
Local Time is: Fri Aug 14 12:48:36 2015 CST
Device supports SMART and is Enabled
Temperature Warning Enabled
SMART Health Status: OK
Current Drive Temperature: 31 C
Drive Trip Temperature: 68 C
Elements
in
grown defect list: 95
Vendor (Seagate) cache information
Blocks sent to initiator = 719156962
Blocks received from initiator = 2801578489
Blocks
read
from cache and sent to initiator = 877477222
Number of
read
and write commands whose size <= segment size = 1623777706
Number of
read
and write commands whose size > segment size = 0
Vendor (Seagate
/Hitachi
) factory information
number of hours powered up = 45424.20
number of minutes
until
next internal SMART
test
= 31
Error counter log:
Errors Corrected by Total Correction Gigabytes Total
ECC rereads/ errors algorithm processed uncorrected
fast | delayed rewrites corrected invocations [10^9 bytes] errors
read
: 824692357 0 0 824692357 824692357 24554.464 0
write: 0 0 94 94 94 23861.799 0
verify: 42585 0 0 42585 42585 3.000 0
Non-medium error count: 142795552
SMART Self-
test
log
Num Test Status segment LifeTime LBA_first_err [SK ASC ASQ]
Description number (hours)
# 1 Background short Completed 16 0 - [- - -]
Long (extended) Self Test duration: 3180 seconds [53.0 minutes]
PS:
Elements
in
grown defect list: 95
Non-medium error count: 142795552
对比了其他机器硬盘的相关参数，这2个数值有些高了，可能影响到了IO性能，故最后决定更换硬盘
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本文转自 xdoujiang 51CTO博客，原文链接：http://blog.51cto.com/7938217/1684786，如需转载请自行联系原作者
