Optimizing System Performance

System Start-Up under OpenVMS

Job type	All jobs.
User	System manager.
Usage	The OpenVMS Install facility can be used to make core SAS images resident in memory.
Benefit	Elapsed time of system start-up might decrease as much as 30 percent when you are running SAS under X Windows and by 40 percent in other modes.
Cost	Installing all images listed in the sample commands consumes between 1200 and 7500 global pages and 6 to 8 global sections.

Installing SAS images can decrease the elapsed time of SAS start-up by up to 40 percent. Installing images is most effective on systems where two or more users are using SAS simultaneously. Use the following commands in the system start-up file to install the core set of SAS images:

$ @SASdisk:[SAS92C.SASFOUNDATION.9^.2UTILITIES.COM]SAS92.COM
$ INSTALL ADD SAS$ROOT:[SASEXE]SAS.EXE/OPEN/SHARED/HEADER_RESIDENT
$ INSTALL ADD SAS$ROOT:[SASEXE]SASMOTIF.EXE/OPEN/SHARED/HEADER_RESIDENT

SASdisk is the disk containing SAS; SAS$ROOT is the root directory of SAS.

The Install Utility can be used to make core SAS images resident in memory. Elapsed time of system start-up might decrease by as much as 30 percent when you are running SAS under X Windows, and by 40 percent in other modes. Installing the images listed in the sample commands consumes the following resources:

SAS.EXE	5 global sections and 9830 global pagelets
SASMOTIF.EXE	4 global sections and 23728 global pagelets

References for System Start-Up

HP OpenVMS System Manager's Manual, Volume 2: Tuning, Monitoring, and Complex Systems
HP OpenVMS DCL Dictionary

Top of Page