Re: high iowait with raid5

From: Shane Hickey (shane@howsyournetwork.com)
Date: Thu Jan 30 2003 - 13:19:30 EST


Okey doke. I'm getting tons of great suggestions and tons of sanity
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
_______________________________________________
sunmanagers mailing list
sunmanagers@sunmanagers.org
http://www.sunmanagers.org/mailman/listinfo/sunmanagers



This archive was generated by hypermail 2.1.7 : Wed Apr 09 2008 - 23:25:44 EDT