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Increasing Free System Page Table entries

Hi,

I've got a brand new terminal server built and we have to reboot the server at least two times during the working day.

The issue appears to be that the server is running out of Free System Page Table entries, when the counter gets to approx 1300 the server becomes highly unstable.

Right now we have 21 users logged on with 6833 entries free.

The server is a quad core with 4gb ram installed, the boot.ini switches are /fastdetect /3GB /NoExecute=OptOut /execute /NOPAE


Any help on increasing the available entries would be greatly appreciated or where I'm going wrong with the server config.

Thanks

Trevor
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buttino
Asked:
buttino
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2 Solutions
 
DarylxCommented:
A. To change the number of Page Table Entries (or System Pages) which are used for mapping I/O buffers and other information into the system address space perform the following:

Start the registry editor (regedit.exe)
Move to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management
Double-click SystemPages value and chose Decimal. Enter the amount of PTEs you need in the Data text box. Click OK. The maximum value is 50,000.
Reboot the computer for the change to take effect.
By default the value is 0 which means use the system default.

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buttinoAuthor Commented:
Current value for this setting is 798720, that's without making the above changes.
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John Gates, CISSPSecurity ProfessionalCommented:
Does the OS see all 4GB of you memory when viewing properties of my computer?

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buttinoAuthor Commented:
No, it only sees 3.4gb of the memory.  I've read that this is "normal" on a 4gb, 2003 box.

Reading about memory, it's suggested that I should not use the /3gb switch. Can anyone confirm this is correct?
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John Gates, CISSPSecurity ProfessionalCommented:
It's normal on a 2003 (32 Bit) box.  The /3gb  is allowing more memory to applications and on a terminal server I would think that's what you want.  What kind of applications are running on this server and how many users do you have a peak utilization??  If it is 21 users, then there is an application problem or other issue.

-D-
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buttinoAuthor Commented:
It looks like we can have about 25 users before it falls over. We had 23 on earlier and we could see things starting to slow down a bit.

Apps- Office 2003, Telnet client to a unix box, Sage 2008 (only 3 users), printing, IE7,

Basically we're running the same apps and amount of users that we had on a 2000 TS box which had 3gb of memory and dual processors. The only reason we upgraded to a new box & 2003 was due to running out of disk space on the old server.


I've found this PDF which talks about tuning TS by Brian Madden which suggests that the /3gb should be removed immediately,
http://www.google.com/url?sa=t&ct=res&cd=1&url=http%3A%2F%2Fwww.datawest.co.nz%2Fdownload_file.php%3Ffile%3D32&ei=pAIWR5-UH5Tu0QTLv7mICA&usg=AFQjCNEnc2GhOf5mBtbosYwpgysNWaCIVw&sig2=KgJAN_9pGW5QnT9dUf5s4A
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John Gates, CISSPSecurity ProfessionalCommented:
Looks like it will be worth a try.  Remove the switch and see what happens.
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buttinoAuthor Commented:
I'll be rebooting the server later this evening, GMT time, will report back then.
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John Gates, CISSPSecurity ProfessionalCommented:
Sounds good.
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buttinoAuthor Commented:
Well, I've just rebooted the server.

Previously after a reboot I had about 24,000 free system page table entries.

After the last reboot, removing the /3gb switch and the other switches, I now have 202,947 entries available!

I'll split the points as technically speaking DarylX answered the question.
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John Gates, CISSPSecurity ProfessionalCommented:
Glad it is working for you now 8)

-D-
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