That a tricky question: VLF writes SMF 41 records, but they are unusable for LLA. Since LLA manages its VLF cache and knows what is in it and what is not, it will always have a 100% hitratio on its VLF cache, which will be reported by VLF records 41. Via LLA exits 1 and 2, we write SMF records with useful LLA information and these records provide how many fetches LLA does from its VLF cache and how many from disk. From that ratio, we decide if the VLF cache is sufficient or not.
Kees. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Elardus Engelbrecht Sent: 25 November, 2014 14:04 To: [email protected] Subject: Re: VLF Caching Thomas Conley wrote: >I've always had to review the SMF data, then make adjustments. No ROTs or >sizing recommendations I'm aware of. Please forgive my ignorance, but what SMF records? Of course I have looked in my SMF book, but must have missed something obvious or used wrong search arguments. Thanks in advance. Peter Relson wrote: >There is no rule of thumb. It's very likely that 16M is way too small, but >we're not likely to change the default. 128M is fairly common, I believe. Ok if you say so. Could that part of MFM not be included in Health Checker so we all can see what sizes are recommended? Groete / Greetings Elardus Engelbrecht ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ******************************************************** For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 ******************************************************** ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
