Re: Informix disk performance problems with archives
Given that your entire system grinds to a halt, I'd suggest that
it may not actually be a problem with your disks. I presume you
have enabled KAIO?
Check the box to see what is happening. Try running a
dd if=/dev/zero of=/de/rmt/whatever bs=1024 count=102400 and see
how your box performs during a 10MB write to a tape drive.
brett
neurologic wrote:
>
> In article <910upp$gb7$1@taliesin2.netcom.net.uk>,
> "Neil Truby" <ntruby@netcomuk.co.uk> wrote:
> > > When performing backups (using ontape) or initializing dbspaces, the
> > > system slows to a crawl -- literally.
> > Well, not literally.
> >
> > Sorry, I don't have much insight to your actual query, except to
> point out
> > the obvious, that archives and dbspace init are both highly i/o
> intensive
> > activities that don't use any cacheing whatever.
> >
> >
>
> I realize the archives and dbspace inits are very intensive activities.
> But this machine slows down to the point that it takes 2-3 minutes to
> authenticate a password when log in! ls takes like 30 seconds to list a
> directory! I've run test databases on 150 mhz ultra 1's without
> anything like this happening.
>
> Sent via Deja.com http://www.deja.com/
> Before you buy.
--
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Brett's 10th law of UNIX administration...
rm is forever
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Brett Geer - UNIX Admin/Analyst/Programmer - Intratex Holdings.
Tel. +27 31 717 4000 Direct. +27 31 717 4146
Fax. +27 31 717 4001
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The little voices are talking to me again, telling me to reach
for a keyboard and type rm -rf /*
last week they had me rm -rf `echo $MANPATH | sed 's/:/ /g'`
now I fear I have no answers
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