linux下查找最耗iowait的進程

 

linux下查找最耗iowait的進程
抓哪個進程幹壞事前要先停掉syslog
service syslog stop

打開block dump:
echo 1 > /proc/sys/vm/block_dump

統計：
dmesg | egrep "READ|WRITE|dirtied" | egrep -o '([a-zA-Z]*)' | sort | uniq -c | sort -rn | head
1423 kjournald
1075 pdflush
209 indexer
3 cronolog
1 rnald
1 mysqld

不要忘記在抓完之 後關掉block_dump和啓動syslog:
echo 0 > /proc/sys/vm/block_dump
service syslog start

http://hi.baidu.com/farmerluo/blog/item/a99b6b63b5c29c6c0d33fae1.html