Peter, Having been involved with caching in prior employment, not IBM, your explanation of just letting normal trimming take care of it is what makes the most sense and is what I have done in the past. If the cache is very active it will age-out fast enough and if it gets referenced again before it is aged-out, then you avoided loading it again. As you said, why waste the cycles for something that is going to naturally occur.
Chris Blaicher Principal Software Engineer, Software Development Syncsort Incorporated 50 Tice Boulevard, Woodcliff Lake, NJ 07677 P: 201-930-8260 | M: 512-627-3803 E: [email protected] -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Peter Relson Sent: Sunday, November 30, 2014 10:58 AM To: [email protected] Subject: Re: VLF caching >>If LLA finds that a module that it had successfully gotten cached no >>longer is deemed worthwhile, it does not tell VLF. >No? Why? Not having been involved in the initial implementation, I'm not sure. Perhaps it was felt that doing so would be overkill, that trimming would do a good enough job such that the overhead of doing the "delminor" was not worth the cycles. It also makes it less flexible -- if there are subsequent fetches, LLA might be able simply to mark its data as "active" and not have to re-cache the module. Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ________________________________ ATTENTION: ----- The information contained in this message (including any files transmitted with this message) may contain proprietary, trade secret or other confidential and/or legally privileged information. Any pricing information contained in this message or in any files transmitted with this message is always confidential and cannot be shared with any third parties without prior written approval from Syncsort. This message is intended to be read only by the individual or entity to whom it is addressed or by their designee. If the reader of this message is not the intended recipient, you are on notice that any use, disclosure, copying or distribution of this message, in any form, is strictly prohibited. If you have received this message in error, please immediately notify the sender and/or Syncsort and destroy all copies of this message in your possession, custody or control. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
