Interesting! I had previously been under the impression that BLSR was "in the picture" from OPEN to CLOSE, positioned somewhere inside VSAM in between the user RPL and the actual I/O operation to read or write a buffer.
So, my question should have been: What statistics can I get from VSAM LSR about the usage of the buffer pool? And how do I get those statistics? Or better, where is it documented what statistics I can get and how to get them, so I can RTFM for myself? I will, of course, immediately go check out the DFHSM Macros manual about VSAM LSR to see what I may have already missed (because I didn't think it applied!). In any case, thank you very much for the interesting info about how BLSR actually does its job. Peter -----Original Message----- From: Jim Mulder [mailto:[EMAIL PROTECTED] Sent: Wednesday, May 09, 2007 3:40 PM To: [email protected] Subject: Re: How to measure actual usage of BLSR buffers? <Snipped> BLSR has no opportunity to provide any function like this. All that BLSR does is intercept the VSM NSR OPEN of a SUBSYS DD, do a BLDVRP to build an LSR buffer pool, CLOSE the SUBSYS DD, and then OPEN the real VSAM dataset using the LSR buffer pool. By the time the application does its first I/O operation, BLSR is completely out of the picture, and the application which was coded to use VSAM NSR is instead using VSAM LSR. 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
