high iowait with raid5
2007-12-25 0:29:00
checks. I'll summarize in a later e-mail. Basically, though, it
appears that have a software RAID5 /var directory isn't a great idea
(especially when the box is a mailserver and when it's an e250). I was
seeing upwards of 3000 sleeping sendmail processes.
What I've done for the moment is to create the spool directory on a
non-RAID filesystem and I symlinked /var/spool to this. Now I have
around 30-50 sendmail processes, which is much, much better.
I was wondering, though, if a symlink'd /var/spool is a bad idea and if
it might be related to some errors that I've been occasionally getting
to the effect of
Jan 30 11:11:04 newbox2 sendmail[3800]: [ID 801593 mail.alert]
h0UHb3x21292: queueup: cannot create ./tfh0UHb3x21292, uid=0: File
exists
I'm hoping that these are the result of the queue getting munged up
while it was on a RAID filesystem and I'm hoping these will go away, but
I thought I'd see if someone knew what these are indicative of.
Thanks for all the help so far,
Shane
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