[THIN] OT: Swap Files
- From: Nick Smith <nick@xxxxxxxxxxxxxxxxxx>
- To: "'thin@xxxxxxxxxxxxx'" <thin@xxxxxxxxxxxxx>
- Date: Tue, 2 Mar 2010 09:13:39 +0000
Purely as a side-interest, I've been personally running Windows 7 without a
page file for the last month with no ill effects (8GB RAM). Performance has
felt snappier.
But then I don't have 40-70 users connecting to me :)
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of
Foster, Bill
Sent: Monday, March 01, 2010 7:14 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Swap file recommendations
You could argue and fail in practical usage scenarios. I disagree with the no
page file option. Without a properly sized page file your server will
eventually give you the low virtual memory warnings and performance will
seriously suffer. By running without a page file you prevent the OS from
properly managing memory.
Bill Foster
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of
Andrew Wood
Sent: Monday, March 01, 2010 9:33 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Swap file recommendations
I'd agree with that - in fact - you could argue that you don't need a pagefile
at all but I've never got round to testing that :?
Fwiw just to go back to Jeremy's point - I've seen servers that were maxing out
30-40 users when running Standard edition. Essentially the servers were maxing
out the 4GB of memory. Upgrading to Enterprise and adding additional memory
(going from 4 to 12GB) enabled those same servers to host 60-70 users.
Granted Enterprise costs more than Standard - but essentially we almost doubled
the number of users on the server for the cost of an enterprise license without
adding more h/w.
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of
Jeremy Saunders
Sent: 01 March 2010 09:49
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Swap file recommendations
Hi Angela,
Yeah....way too big. You will often find that even with a 4GB pages file, it's
usage is only 30 - 40%, so why create larger ones? Run up Perf Mon and check
the pagefile usage under load. Personally, I start with a 4GB pagefile, and cut
back from there.
None of your "client" apps will be PAE aware...not even the MS Office Suite.
Like I said the extra addressable memory will only be used by the system as
virtual memory.
Cheers,
Jeremy.
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of
Angela Smith
Sent: Monday, 1 March 2010 3:59 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Swap file recommendations
Hi
I have PAE enabled and we have no issues with the Applications working in this
mode. I have set the "write debugging information" option to kernel memory
dump. I have set the pagefile to 10GB but am concerned its too big or may have
a performance impact. Is there any issues with leaving the swap at 10GB? Is
performance impacted as the file is bigger?
Regards
Angela
________________________________
From: stefan.timmermans@xxxxxxxxx
To: angela_smith9@xxxxxxxxxxx
Subject: RE: [THIN] Re: Swap file recommendations
Date: Sun, 28 Feb 2010 20:45:06 +0100
Angela,
The PAE switch is ok, if the apps (or at least some ) are PAE aware (kind of >
32bit but less then a real 64 bit environment), so this might be limitted to MS
apps addressing above the 4GB barrier (maybe Oracle ? anyone an idea on that ?
or does Oracle have its own memory manager as some SAP products do ??)
Paging beyond 4096MB requires several volumes as there is an limit imposed per
volume of 4096MB (but there is a backdoor to create separate folders for every
pagefile)
http://support.microsoft.com/kb/237740
Regards,
Stefan
________________________________
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of
Jeremy Saunders
Sent: zondag 28 februari 2010 17:42
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Swap file recommendations
That's not 100% correct Nick. Using Enterprise Edition you can enable /PAE in
the boot.ini so that the "System" will see all the RAM. No apps will be able to
address the memory above 4GB, but the System will use it as virtual memory.
There have been many studies done that say that this will provide a
considerable performance boost. I would still start with a 4GB page file, but
you may be able to decrease this or remove it altogether. However, if you still
want to enable kernel memory dumps, leave an 850MB page file on the System
drive. You would never do a full memory dump!
Cheers,
Jeremy.
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of
Nick Smith
Sent: Sunday, 28 February 2010 8:32 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Swap file recommendations
The x86 OS will only see 3gb Ram in any case so you don't need to worry too
much.
On 28 Feb 2010, at 04:07, "Angela Smith"
<angela_smith9@xxxxxxxxxxx<mailto:angela_smith9@xxxxxxxxxxx>> wrote:
Hi
Im building new Windows 2003 Enterprise servers with XenApp 4.5 (32 bit).
Servers have 16Gb RAM. Hardware was originally sized for x64 but we must go
with x86. How big should the swap file be if server has 16Gb RAM? If I follow
the RAM X 1.5 rule I will end up with a 24GB swap which seems like overkill. I
have the disk space but was wondering what the best practice is or if there are
dissadvantages in using a large swapfile.
Thanks
Angela
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