Thanks for the idea. A question though -- where exactly in the SDSF panels would I see the pages of core used by the job step -- my SDSF DA panel only has a column for REAL storage (SDSF manual says that column represents real page frames). That would only give me the working-set size, right? Although, since I notice my paging rate is practically always zero, I suppose that could be the virtual size as well.
Also, that column is only 4 digits (plus comma), after 9,999 the format looks like " 14T ", which seems to be in thousands. Not very granular, but I guess that would put it within the megabyte-or-so that you suggested. Thanks again for the idea. Peter -----Original Message----- From: GAVIN Darren * OPS EAS [mailto:[EMAIL PROTECTED] Sent: Wednesday, May 09, 2007 4:45 PM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: How to measure actual usage of BLSR buffers? Far as I know there is no way to get actual usage statistics from any kind of buffering (zOS, VSAM(AMP), LSR, GSR, BLSR or IMS LSR's) unless it's a 3rd party product. However you can determine how effective they are being used by doing the following. Monitor the number of Pages of core the job Step uses from SDSF, and multiply the number of pages used by 4096 to get the amount of memory the step used in bytes. Calculate the expected memory usage if max buffering of all BLSR pools (Block size(CISZ) * Buffers) that could be used. If the two figures are within a megabyte (or more) with the job step higher then the expected usage so you've likely used all the BLSR pools. If the job step runs with memory lower then expected buffering figure, then you know that not all the requested buffering space was used. It's not exact by any means, but might help. Darren This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
