High Level Summary for Garbage Collection: Guarded Storage Facility (GSF)
Also known as less-pausing garbage collection, Guarded Storage Facility is a new architecture introduced with z14 to enable enterprise scale Java applications to run without periodic pause for garbage collection on larger heaps. z/OS GSF support allows an area of storage to be identified such that an Exit routine gets control if a reference is made to that storage. GSF is managed by new instructions that define Guarded Storage Controls and system code to maintain that control information across un-dispatch and re-dispatch. Enabling a less-pausing approach improves Java garbage collection. Function is provided on z14 running z/OS 2.2 and later with APAR OA51643 installed. MACHMIG statement in LOADxx of SYS1.PARMLIB provides ability to disable the function. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
