It looks as if it uses VLF's SMF41 records. They provide the VLF view on the LLA cache. VLF knows how large the cache is, how much is used, how much trimming LLA has done. And what LLA's hitratio is, but this will always be near 100%, as I explained before.
If it also tells you, per library, how many fetches LLA resolved from its VLF cache and how many from disk, then it has access to the LLA statistics, which can tell you if the VLF cache is sufficient or should be enlarged. If so, it would be interesting where it gets those metrics from. Kees. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Steve Thompson Sent: 25 November, 2014 15:02 To: [email protected] Subject: Re: VLF Caching On 11/25/2014 08:03 AM, Elardus Engelbrecht wrote: > 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. <SNIPPAGE> Embarrassing, but I don't know which SMF records get involved. I would have to go dig though the various ISV doc to find that out. However, apparently CP-Expert knows which ones to be looking at. I'm not sure about MXG or MICS. But CP-Expert gives us a report that shows how much cache you have for the CSVLLA class, and how much you used of it (don't know how it does that). And somehow it finds all the cache trim events and reports on that. Regards, Steve Thompson ---------------------------------------------------------------------- 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
