On 01/28/2015 01:32 PM, Jatin Davey wrote: > Hi Users > > I am using RHEL 6.5 on my server. > > From top command i can see that the processors in my server are > spending a lot of time on wait for I/O. > I can see high percentage in terms of 30-50% on "wa" time. > > Here is the df output about the disk space in my system: > > ********** > [root at localhost images]# df > Filesystem 1K-blocks Used Available Use% Mounted on > /dev/sda1 1915071844 103227908 1714563936 6% / > tmpfs 32931472 0 32931472 0% /dev/shm > ********** > > Could someone point me on how to improve the disk I/O on my server and > reduce the wait time on I/O. you could use iotop or vmstat to see what processes are causing the IO.