Re: [courier-users] NFS server load thru the roof

[Gordon M. <yi...@eb...>]

email builder wrote:
> 
>>  We have much the same system setup and problems described here:
>>
>>http://thread.gmane.org/gmane.mail.imap.courier.general/21782

Have you tested with filesystems other than ReiserFS?  Have you tested 
mounting the FS with the "noatime" option?

>>  Briefly, mail spool is mounted over NFS, everything runs smoothly until
>>we
>>turn IMAP on and server load goes off the scale (NFS client load 300, NFS
>>server load 10, with server in wait about 80% of the time).

How many users are connecting to the NFS client host at the same time? 
If you run 'ps ax' on that host, you should see ~300 processes in R or D 
state.  What are they?

>>I am guessing it is more of a NFS
>>configuration thing, or possibly something with our file system on the NFS
>>server (reiserfs and RAID 5), but I'm a little wet-behind-the-ears on that
>>front, so even some baby hand-holding by someone who has the time and
>>patience would be highly appreciated.  I mean, I don't even know if the
>>"sync" option for our mail spool NFS mount is best turned off....?

"sync" is off by default, and should remain so.