Miklos, All LE products, even Cobol use the HEAP ..working storage is placed in the HEAP
Scott ford www.identityforge.com from my IPAD 'Infinite wisdom through infinite means' > On Dec 2, 2013, at 9:14 AM, Lizette Koehler <stars...@mindspring.com> wrote: > > Miklos, > > I found HEAPCHK in z/OS Language Environment Customization > > HEAPCHK Derivation: HEAP storage CHecKing Use HEAPCHK to run additional > heap check tests. > If HEAPCHK(ON) is used with STORAGE(,heap_free_value), the free areas of the > heap will also be checked. > If HEAPCHK(ON) is specified, this will result in a performance degradation > due to the additional error checking that is performed. > A U4042 abend dump will be generated when an error is detected, but no > CEEDUMP will be produced. > > > > And for HEAPZONE I found in z/OS Language Environment Programming Reference > > Derivation: HEAP check ZONES > > The HEAPZONES runtime option is used to turn on overlay toleration and > checking for user heaps. When activated, the runtime option affects any > obtained storage that can be controlled by the HEAP or HEAP64 runtime > options. HEAPZONES also affects storage obtained from a heap pool. A heap > check zone is an additional piece of storage that is appended to an > allocated element during a storage request. The size of the check zone > depends on the size31 and size64 suboptions of HEAPZONES. The check zone can > be examined for overlays when the heap element is freed. > > > So it looks that HEAPCHK has a performance overhead and validates heaps of > (I think) all HEAPS and the other a runtime option to provide overly > toleration and check for USER heaps. > > Lizette > > >> -----Original Message----- >> From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On >> Behalf Of Miklos Szigetvari >> Sent: Monday, December 02, 2013 2:17 AM >> To: IBM-MAIN@LISTSERV.UA.EDU >> Subject: HEAPCHECK and HEAPZONE difference in zOS 2.1 >> >> If someone can explain the difference between HEAPCHECK and HEAPZONE >> (new in z/OS 2.1) >> >> -- >> Kind regards, / Mit freundlichen Grüßen >> Miklos Szigetvari >> >> Research& Development >> ISIS Papyrus Europe AG >> Alter Wienerweg 12, A-2344 Maria Enzersdorf, Austria >> T: +43(2236) 27551 333, F: +43(2236)21081 >> E-mail: miklos.szigetv...@isis-papyrus.com >> Info: i...@isis-papyrus.com Hotline: +43-2236-27551-111 Visit our brand > new >> extended Website at www.isis-papyrus.com > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
