jerker at Update.UU.SE
Mon May 12 20:22:01 UTC 2008
On Sun, 11 May 2008, Alexey Polyakov wrote:
> That's RHEL5 clone, right?
> I've had same problems with disk IO on CentOS5, also RHEL5 clone. Please
> see `iostat -kx 1` output, look at rrqm/s column, to see if it's
> actually merging IO requests, mine was not doing it. I solved it by
> building custom 18.104.22.168 kernel. I also switched FS type (to reiser4,
> after trying xfs and ext3fs), but I think custom kernel did the trick.
Thanks! I don't understand the meaning of all the columns yet. With what
should I compare the rrqm/s column? I will try a custom kernel also and
compare file systems. What performance do you get?
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