Blockpaging: paging groups of related pages in and out. Although I don't know if this applies to this situation.
Kees. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Elardus Engelbrecht Sent: 05 August, 2015 10:45 To: [email protected] Subject: Re: Limit number of frames of real storage per job Andrew Rowley wrote: >I'm not sure if you can artificially limit the frames available, but I would >expect that the effect of paging on a Java application would be BAD. Very bad. Of course! >Java needs to perform regular garbage collection. A la Commodore 64 garbage collection.... I still have bad dreams of that infamous C64 garbage collection... ;-) >(I'm not sure whether z/OS is smart enought to recognise the pattern and bring >pages back in before they are required) It would be interesting of z/OS can do that. Peter Relson? John Eells? Jim Mulder? What do you say about that? I know IEBGENER, DFSORT and ICETOOL do their checking of storage (memory and temp workspace) and then do with whatever is available. >I wouldn't bother testing - I would just say that sufficient memory is >required to execute in real storage. Agreed - actually if you have too few memory, you can't do anything. Increase as needed and retry. If I want to do any testing, I will do it in a sandbox with a small configurable memory. (CF STOR,etc.) >Another consequence of this behaviour is that you should not make the Java >heap too large. Good point. I have written it up in my notes. Thanks! 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
