As I said, I remember reading this a long time ago, I don't know the details anymore, whether the source was reliable and whether it is still working this way. Only a DB2 internal expert should be able to tell.
Greg, could you shed a light on this? Kees. > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On > Behalf Of Tony Harminc > Sent: 12 April, 2017 18:45 > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: Paging subsystems in the era of bigass memory > > On 12 April 2017 at 10:16, Tom Marchant < > 0000000a2a8c2020-dmarc-requ...@listserv.ua.edu> wrote: > [DB2] > > > So, if it thinks it would be faster to read the record from DASD than > for > > MVS to page in the buffer page(s) containing the record, it will read > the > > record into different pages that have not been paged out? > > > > It still makes no sense to me. It certainly can't read the record into > the > > same page, because that would require that the page be paged in first. > > > > I've no idea what it *does* do, but it *could* Page Release the old page > before reading from DASD into it. > > > > And what does it do with the old buffer page? Stop using it? Freemain > > and getmain again so that the page slot becomes superfluous? > > > > That would be taken care of by the Page Release. > > Tony H. > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu 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 lists...@listserv.ua.edu with the message: INFO IBM-MAIN
