On Wed, 5 Nov 2008 08:21:17 -0500, Mark Jacobs wrote: >Sergio Marques wrote: >> Hi, >> I need some suggestions, or tools, to clear some areas in CSA/ECSA and so >> to avoid unplanned IPLs. >> Can you help me ? >> TIA > >There is no really safe way to release allocated CSA/ECSA storage. If >you are sure that it isn't being used it can be done, but I wouldn't do >it unless the system was about to fail anyway. > >What is your ECSA allocation? We set our's are 250MB and it never gets >more than 40% allocated leaving lots of room for unexpected allocations.
Mark is right. CSA/ECSA is by definition used by more than one address space. Because of that, even if the address space that allocated it is no longer active, another address space may still be using it. Furthermore, users of CSA/ECSA should all be privileged. So if you decide to free some area, the program that was using it won't necessarily fail if you free it. When some other address space comes along and allocates that storage, it may fall victim of the address space that is still using it. You should set your CSA and ECSA large enough so that you have plenty of room for growth. IMO, Mark's 40% is good. If you have a program whose use of CSA/ECSA is increasing, you should contact the vendor. -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
