This may trigger it on a 1G server
perl -e '$num=50_000_000; @a=(0..$num); foreach $j (0..4) { $a[$_] = $_ foreach
(0..$num); $|=1; print "Done with pass $j at", `date` ; } print "Done\n"'
(thanks to my colleague Ted for figuring that out).
-----Original Message-----
From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Marcy
Cortes
Sent: Friday, November 01, 2013 12:50 PM
To: [email protected]
Subject: Re: [LINUX-390] SLES 11 SP3 problems
No, all shows up in system.
-----Original Message-----
From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Ron Foster
Sent: Friday, November 01, 2013 12:34 PM
To: [email protected]
Subject: Re: [LINUX-390] SLES 11 SP3 problems
Is there a particular process using all the time?
Sent from my iPhone
On Nov 1, 2013, at 12:31 PM, "Marcy Cortes" <[email protected]>
wrote:
> We're experiencing a problem with kernel 3.0.93 (SP3). It seems on servers
> that are memory constrained can go into a loop doing tons of i/o - 8000+ /
> second.
> It seems to happen with things like WAS deploys. We may have also been
> able to recreate use a simple perl array.
>
> Has anyone else seen this?
>
> Yes, we have a high priority SR opened with SUSE.
>
> Oddly we have seen something like this after a kernel update on SP2. That
> was solved by changing vm.swappiness to something > 0. We have put it back
> to 60 (the default) and still get the problem.
> Upping the memory solves it, but obviously, that's not something we want to
> be doing, especially in our constrained dev environment.
>
>
> Marcy
>
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