Bauer,
You said you get 60k to 80k hits/hour some times, and this is eating
your memory away. If you have Apache or IHS installed, you should
consider taking a look on httpd.conf to reduce the webserver memory
footprint.
By default, the httpd.conf loads a whole bunch of modules, for
directory
One of our Redhat servers got a LOT of activity yesterday and the swap space
looks funny to me.
swapon -s
FilenameTypeSizeUsedPriority
/dev/dasda2 partition 1023976 3692-1
/dev/dasdb1
On Wed, Nov 2, 2011 at 12:37 PM, Bauer, Bobby (NIH/CIT) [E]
baue...@mail.nih.gov wrote:
One of our Redhat servers got a LOT of activity yesterday and the swap space
looks funny to me.
swapon -s
Filename Type Size Used
Priority
/dev/dasda2
On Wed, Nov 02, 2011 at 07:37:17AM -0400, Bauer, Bobby (NIH/CIT) [E] wrote:
Date: Wed, 2 Nov 2011 07:37:17 -0400
From: Bauer, Bobby (NIH/CIT) [E] baue...@mail.nih.gov
To: LINUX-390@VM.MARIST.EDU
Subject: Odd swap space behavior
One of our Redhat servers got a LOT of activity
That's what you want when you're using spindles, but on z, you're usually
talking about v-disks, which are really virtual disks in memory. When
they're not in use, they take up no space at all, but when you start using
them, they start to occupy real memory and become a burden. So you set
of Health
Bethesda, MD 20892-5628
301-594-7474
-Original Message-
From: RPN01 [mailto:nix.rob...@mayo.edu]
Sent: Wednesday, November 02, 2011 10:14 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Odd swap space behavior
That's what you want when you're using spindles, but on z, you're
On Wed, Nov 2, 2011 at 2:25 PM, Richard Higson richard.hig...@gt.owl.de wrote:
haven't done Linux on Z for a while, but I have always used the same
Priority for the swapdisks
so that linux could spread out the IO to several disks (preferably on
separate spindles).
This works well on x86
of Health
Bethesda, MD 20892-5628
301-594-7474
-Original Message-
From: RPN01 [mailto:nix.rob...@mayo.edu]
Sent: Wednesday, November 02, 2011 10:14 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Odd swap space behavior
That's what you want when you're using spindles, but on z, you're
You might also consider using a real disk to back the v-disk for the peak
period swap, so that it doesn't add additional memory pressure to the
underlying z/VM system.
On 11/2/11 10:29 AM, Richard Troth vmcow...@gmail.com wrote:
You might consider a manual 'swapoff' (then 'swapon') of one
As Rob said, there's no page migration in Linux.
Yet.
8-)
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On Wed, 2 Nov 2011 11:29:40 -0400 Richard Troth wrote:
So what you're seeing
is random pages which got pushed out at various times during the
stress period. If not needed, they will sit there forever.
Well, maybe not forever ... ;-)
This lazy (de-)allocation behaviour of Linux is worth
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