> Subject: Sas and Unix CPU Time
> Author: Jonathan Miller <NYPRO.JMiller@SDPS.ORG>
> Date: 8/31/99 3:49 PM
> Sas processes seem to use an inordinate amount of CPU time on the unix
> side. Even one SAS process can bog down the system. Does anyone
> know if their is a way to modify SAS CPU usage other than using the
> NICE command in unix.
> Please send the SAS question to the following address:
Define "inordinate". Compared to other Unix processes, or compared to
SAS on other platforms?
What sort of processing are you doing? Data step processing tends to be
pretty light on CPU unless dataset compression is selected. Some
procedures, particularly advanced statistical procedures, can be quite
Are you collecting system timing statistics from SAS with the STIMER or
(preferably) FULLSTIMER options? If you use the STIMEFMT=Z option (I
think, this from memory), you can get uniformly presented timings which
can be automajikally analyzed -- in SAS, of course (you'll have to write
code to analyze your SAS log).
Many system configuration issues can impact how SAS utilizes resources.
Likely culprits are using networked filesystems (NFS, AFS, Samba),
software-based RAID systems, and certain filesystem configuration
SAS has suggestions on Unix system performance tuning at the following
(All SAS Unix tech notes)
Karsten M. Self (firstname.lastname@example.org)
What part of "Gestalt" don't you understand?
SAS for Linux: http://www.netcom.com/~kmself/SAS/SAS4Linux.html
Mailing list: "subscribe sas-linux" to
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