Date: Wed, 12 Mar 2003 12:15:16 -0500
Reply-To: Phil Rack <PhilRack@MINEQUEST.COM>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: Phil Rack <PhilRack@MINEQUEST.COM>
Subject: Re: sas performance on pc
Content-Type: text/plain; charset="iso-8859-1"
In addition to Paul's comments, I want to toss out that Windows NT/2000/XP
only allocate 512K of memory to I/O buffering. This is true on the MS
server products as well. You can modify the "I/O Lock Page Lock Limit" in
the registry to something more appropriate. I use 32mb on my W2K machines
and 64mb on the servers. It can decrease execution time quite a bit for the
right disk I/O bound programs.
If you are hesitant to modify the registry yourself, you can download system
software that will allow you do this via point and click. The software is
called Cacheman and you can get it at my web site. Go to www.minequest.com
and select downloads. Go to the bottom of the page and you will find a
cachman511 available for download.
Phil
Phil Rack
MineQuest, LLC
SAS Consulting and Contract Programming
Tel: (614) 457-3714
E-Mail: Philrack@MineQuest.com
http://www.minequest.com
-----Original Message-----
From: ciro baldi [mailto:baldi@ISTAT.IT]
Sent: Wednesday, March 12, 2003 11:49 AM
To: SAS-L@LISTSERV.UGA.EDU
Subject: sas performance on pc
dear l-ers,
this time i need an help on a performance issue.
I'am processing huge amount of data and my programs do a lot of data steps
and sorting. I run sas8.1 on win2000. this pc has 1GB ram and i set in the
sasv8.cfg the following two parameters: memsize 512m sortsize 256m . but
watching at the task manager indicators it seems that my programs use only a
little amount of memory (up to 120 mb when the program is sorting), causing
the processing to be dramatically slow. how can it be possible? maybe the
programs could be changed in a way to better use the memory that is
available, and i would like to learn how to do it, but my primary interest
is: letting the programs unchanged is there any other configuration
parameter that should be set to improve the performance? more generally any
suggestion to improve the performance is greatly welcomed. thanks in advance
ciro
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