[THIN] Re: Page file max out
- From: Steve Parr <sparr@xxxxxxxxxxxxx>
- To: "'thin@xxxxxxxxxxxxx'" <thin@xxxxxxxxxxxxx>
- Date: Fri, 21 Jan 2005 14:10:31 -0500
Are there Citrix Admin's out there disabling hyperthreading if running Win2k
OS?
Have seen recommendations that it is better to disable for Win2k but for
Win2k3
hyperthreading generally will give a performance boost depending on load and
type of app.
Is there anyone out there who has tested\experinced Win2k OS for
hyperthreading vs. disabled
hyperthreading when running Citrix/TS? I just hear people saying that
hyperthreading "could" lead
to system stability, but perhaps there are people out there who have
switched from one mode to
another and seen noticeable improvements?
-----Original Message-----
From: Tim Mangan [mailto:tmangan@xxxxxxxxxxxx]
Sent: Friday, January 21, 2005 8:29 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Page file max out
Pavlo,
I looked back at the thread, because I thought you mentioned Win2K servers,
but I couldn't find the reference. If so, Hyperthreading should be disabled
(Hyperthreading is OK on Win2k03 and WinXP). I have not seen it cause these
symptoms - but who knows? Hyperthreading is disabled in the BIOS.
Originally, you mentioned that "Page Swaps 100%". What does that mean? So
let's explore if that is really what is going on.
If I thought paging was an issue, I would first look to the Windows Task
Manager to see if the "Total Commit Charge" exceeds the "Physical Memory".
Constant paging will not occur until physical memory is exceeded. In the
numbers you show, it looks like (at least for that snapshot) you are below
this threshold. So I would use the performance monitor to watch these
values. (Note: you should run the Performance Monitor GUI from another
system and gather stats remotely). Next, I would look a the Performance
Manager "Memory:Pages/Sec". This counter includes paging of code/data pages
of applications, plus paging due to application file system cache. The
counter is in pages per second. So how many pages per second, when the
problem is evident and when it is not?
Tim Mangan
_____
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Pavlo Ignatusha
Sent: Wednesday, January 19, 2005 9:17 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Page file max out
OK,
I spent some time in the Perfmon and here is what I found while CMC reports
full load based on Page Swap:
1. Perfmon %DPC and %Interrupt for each processor are almost flat (1-8%)
2. Perfmon Process Page Faults/sec shows no single leader. A lot of apps
and windows services spike every so often but no one is claiming High page
Faults for longer then 2 sec. The most Page Faults were reported for
WinMgmt
some instances of Dynamics
some instances of Winlogon
some instances of Winword
some instances of guiengine (SQL client for patient information system)
some instances of Outlook
some instances of Accuterm97
spoolsv
some instances of CSRSS, wfcshell
naPrdMgr
3. Taskmon stats:
Totals
Handles 62313
Threads 3946
Processes 334
Physical Memory (K)
Total 2096604
Available 585365
System Cache 362476
Kernel Memory (K)
Total 211100
Paged 136364
NonPaged 74740
Commit Charge (K)
Total 1841980
Limit 7162272
Peak 2428548
Since I do not see a single source of the problem then maybe I'm running out
of resources? But interestingly I have 3rd server HP DL 380 with
Hyperthreading on and more memory but it is still hosting almost same number
of users and is getting maxed out on Page swap in CMC just as well. I'm
really puzzled.
Thanks for any help with this,
Pavlo Ignatusha
Systems Network Coordinator
Pembroke General Hospital
Tel. (613) 732-3675 ext.6150
Fax. (613) 732-9986
www.pemgenhos.org
"All that matters is love and work" - Sigmund Freud.
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