) (CTR)
Sent: Monday, June 28, 2010 11:24 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Memory use question
Hi
Well this is not something I would do in my shop. Not having swap
available for Linux is just asking for trouble. One reason is that you
really want to size your guests in such a way
-390@VM.MARIST.EDU
Subject: Re: Memory use question
So with swappiness higher, Linux is making decsions to
preemptively move something from memory to vdisk. Well, your
vdisk is in VM's pageable memory too.
So moving something from one piece of VM memory to another
piece of VM memory
-Original Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of
Mrohs, Ray
Sent: Monday, June 28, 2010 10:21 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Memory use question
This led me into an interesting area. I just set a couple of our test
servers to run without swap space
Rob van der Heij wrote:
On Wed, Jun 23, 2010 at 8:47 PM, Mrohs, Ray ray.mr...@usdoj.gov wrote:
Rob,
Heap size is set to 500M/1000M. I've read recommendations to make default/max
the same number, but I would just be guessing at a value. It has grow close to
800M at least once, but it always
On Thu, Jun 24, 2010 at 9:59 AM, Rodger Donaldson
rodg...@diaspora.gen.nz wrote:
Well, bearing in mind both the Sun and IBM JVMs default to memory
settings that both IBM and Sun say are crap for app servers (e.g.
neither using their 1.4 or later GC algorithms by default), I'm not sure
I'd
...@velocitysoftware.com
To:
LINUX-390@vm.marist.edu
Date:
06/24/2010 04:45 AM
Subject:
Re: Memory use question
On Thu, Jun 24, 2010 at 9:59 AM, Rodger Donaldson
rodg...@diaspora.gen.nz wrote:
Well, bearing in mind both the Sun and IBM JVMs default to memory
settings that both IBM and Sun say are crap
On Thu, Jun 24, 2010 at 1:09 PM, Richard Gasiorowski rgasi...@csc.com wrote:
Rob has a good point in resource usage and with GC it definitely is the
lesser of two evils. I have never had an instance where after determining
the GC Collector settings performance and % utilization suffered
-Original Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On
Behalf Of Marcy Cortes
Sent: Wednesday, June 23, 2010 3:45 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Memory use question
Rob mentioned the vm.swappiness setting and he and I have had
a lot
and delete this message. Thank you for
your cooperation.
-Original Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Mrohs, Ray
Sent: Thursday, June 24, 2010 5:53 AM
To: LINUX-390@vm.marist.edu
Subject: Re: [LINUX-390] Memory use question
-Original
-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Mrohs, Ray
Sent: Thursday, June 24, 2010 5:53 AM
To: LINUX-390@vm.marist.edu
Subject: Re: [LINUX-390] Memory use question
-Original Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On
Behalf
e-mail and delete this message. Thank you for
your cooperation.
-Original Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Rob van
der Heij
Sent: Thursday, June 24, 2010 1:44 AM
To: LINUX-390@vm.marist.edu
Subject: Re: [LINUX-390] Memory use question
On Thu
Hi,
I am experimentally minimizing the footprint of a SLES10 WebSphere 7 instance
and seeing the following.
Swap is to v-disk.
top:
Tasks: 120 total, 3 running, 117 sleeping, 0 stopped, 0 zombie
Cpu(s): 5.3%us, 0.3%sy, 0.0%ni, 94.0%id, 0.3%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 2050776k
On Wed, Jun 23, 2010 at 4:46 PM, Mrohs, Ray ray.mr...@usdoj.gov wrote:
The cache number looks interesting because it remains large while swap space
is being used up. This particular
instance has been up for 30+ days, so maybe there is incremental swap space
saturation over time?
Swappiness
Subject: [LINUX-390] Memory use question
Hi,
I am experimentally minimizing the footprint of a SLES10 WebSphere 7 instance
and seeing the following.
Swap is to v-disk.
top:
Tasks: 120 total, 3 running, 117 sleeping, 0 stopped, 0 zombie
Cpu(s): 5.3%us, 0.3%sy, 0.0%ni, 94.0%id, 0.3%wa
Also:
so maybe there is incremental swap space saturation over time?
Use your perf tool and plot out the last 30 days of swap size to see if it
looks like a leak.
Marcy
This message may contain confidential and/or privileged information. If you
are not the addressee or authorized to
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Memory use question
It's called a native memory leak.
Lots of things can cause it.
Thread pools, asynci i/o are two areas where this can happen.
See http://www-01.ibm.com/support/docview.wss?uid=swg21368248
Also http://www-01.ibm.com/support
Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On
Behalf Of Rob van der Heij
Sent: Wednesday, June 23, 2010 11:06 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Memory use question
On Wed, Jun 23, 2010 at 4:46 PM, Mrohs, Ray
ray.mr...@usdoj.gov wrote:
The cache
@vm.marist.edu
Subject: Re: [LINUX-390] Memory use question
Marcy, thanks for the pointers. I verified that the thread pool default/max
numbers are the same, and the async I/O box remains unchecked. The swap space
used stays at 0 for a day or two, but slowly climbs. There are also dips
On Wed, Jun 23, 2010 at 8:47 PM, Mrohs, Ray ray.mr...@usdoj.gov wrote:
Rob,
Heap size is set to 500M/1000M. I've read recommendations to make default/max
the same number, but I would just be guessing at a value. It has grow close
to 800M at least once, but it always falls back to around the
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