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тАО02-12-2006 09:31 PM
тАО02-12-2006 09:31 PM
A Real Technical Challenge for Experts - Windows SBS 2003 Server Performance Optimization
I have a Windows SBS 2003, which is primarily used as a file server. Shared folders with plain ascii text files are accessed by users to read and write through a DOS 16 bit application. Users also use the shared folder to view "images" in the DOS application.
My challenge is
(a) The Page/Sec is peaking to 100% every 10 seconds and the result is erratic performance - delays experienced by user.
(b) The disk queue also peaks to 70-100% once in 10 seconds.
The server is a Dell PowerEdge 2800 with 4 GB RAM and a Raid 5 System. Approx 30-50 users connect to the Server at a time. The primary is a PDC for the domain. All possible services are stopped on this server and DNS, WINS etc is load balanced to a secondary server.
Any help to improve the performance of the server will be sincerely appreciated. Please let me know if I can offer any more stats to diagonize this further.
Thanks.
- Santy Balan
===================================================================================================================
Here are few statistics of the Server :-
TOtal Memory : 4 GIG
Raid 5
C Drive : 12 GB {paging file : 2 - 2 GB}
D Drve : 240 GB {paging file : 8 - 20 GB}
Acting as File Server for shared folders. Accessed by 30-50 users to read/write text files into the shared fodler.
Pages per sec... peaks to 100% about every 10 seconds
Average Disk Queue peaks to 70-80% about every 10 seconds
Process Stats
% of User Time = 5-10%
% of Processor Time = 100%
% of Privileged Time = 100%
Memory
Available Bytes = 100%
Free System Page Table Entries = 100%
Commit Limit = 100%
Page Reads = Spikes in 10 sec upto 100%
Page writes < 5%
Transition faults/sec = spikes in 10 sec upto 100%
Physical Disk
Average Disk Queue = Spikes in 10 sec upto 100%
Paging File
% of paying file usage < 1 % constant
Commit Charge (K)
Total : 2490632
Limit : 14409488
Peak : 2544516
Physical Memory (K)
Total : 4193360
Available : 1663572
System Cache : 1854808
Kernel Memory (K)
Total : 124652
Paged : 73828
NonPaged : 50824
Totals :
Handles : 25707
Threads : 1090
Processes : 74
CPU Usage = 2%
Commit Charge : 2431M/14071M
PF Usage : 2.37 GB
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тАО02-13-2006 12:45 AM
тАО02-13-2006 12:45 AM
Re: A Real Technical Challenge for Experts - Windows SBS 2003 Server Performance Optimization
If memory available bytes < 4MB - Add RAM
If pages/sec > 20 - Add RAM
Paging file % usage > 70% - Add RAM
Disk Physical Disk Time > 90% - Your RAID level is not good enoguh.
Processor % Processor time > 85% - Need mor processing power
Server Bytes Total/sec ~= Network speed, increase bandwidth speed.
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тАО02-13-2006 02:39 PM
тАО02-13-2006 02:39 PM
Re: A Real Technical Challenge for Experts - Windows SBS 2003 Server Performance Optimization
The Page/Sec is high and the Disk Queue length is high (both are touching 90-100)
Is the RAID 5 causing the write/read Queue ? How can I verify this ?
The users use some ASCII text file from server for lookups... does this cause more Page/Sec ?
Is anybody willing to help me with the logs... If I post them here ? or Email them ?
Any help is sincerely appreciated.
Thanx.
Santy Balan
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тАО02-13-2006 02:43 PM
тАО02-13-2006 02:43 PM
Re: A Real Technical Challenge for Experts - Windows SBS 2003 Server Performance Optimization
The system was working earlier with an old PowerEdge 1400 with 256 RAM and users seem to be more happy with the performance than with the new PowerEdge 2800 with 4 GB RAM and 270 SCSI Raid 5.
How do I diagonize the bottleneck ?
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тАО02-14-2006 02:51 AM
тАО02-14-2006 02:51 AM
Re: A Real Technical Challenge for Experts - Windows SBS 2003 Server Performance Optimization
1) add additional physical memory. I'd take it up to system max if that is financially feasable.
2) adjust the swap file so that it is contiguous and is configured to be 2xRAM+2Meg.
3) investigate getting faster scsi drives and a fast scsi card with plenty of onboard cache.
4) separate the domain controller function from the network storage function by putting one or the other on seperate machines
5) get a backup domain controller