iowait question
 

Any ideas how to reduce IOWAIT and increase disk speed on Linux server.

Server has 8 CPUs and with 32GB RAM.

Thanks in advance

You can try the following tool:

IOzone Filesystem Benchmark
Iozone Filesystem Benchmark

Also, I think this articale will help you to improve the performance of your linux system

Linux.com :: A three-pronged attack on performance

I've used IOzone Filesystem Benchmark in the past and it always give good results for me. Give it a try and let us know if it helps you out.

What kind of filesystem are you using? Ext2, ext3, vxfs?

If you are using ext3 file sytem, you can add the following option in /etc/fstab file and that would save some time. EXT3 filesysystem keep last access time information for each file and it takes more time. If we disabled that option, then it would be much faster.


noatime,nodiratime

Great links provided, I went and checked them out and you will definately get the help you are looking for. So if you have not visited them I would suggest that you do so if you are serious about your disk speed on Linux.

Personally I would not do this as you are disabling a security feature that very well may be needed if some file comes up missing or has been modified for some nefarious reason. Rather than do this, I would upgrade my server.

How would you know that it would come up missing or become modified? I am curious to know why your security would not prevent this from happening.

Great link it was very useful one thanks for sharing with us