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export IBM_JAVA_OPTIONS=-Xms8m export IBM_JAVA_OPTIONS="-Xmx96m "$IBM_JAVA_OPTIONS export IJO=-Xms8m export IJO="-Xmx96m "$IJO" Jerry Whitteridge jerry.whitteri...@albertsons.com Manager Mainframe Systems & HP Non-Stop Albertsons Companies -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Jerry Whitteridge Sent: Friday, July 17, 2020 10:08 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: EXTERNAL EMAIL: Re: Java memory limit You may want to look at your Java memory settings and defaults. For example in my .profile for OMVS I have the following statements export IBM_JAVA_OPTIONS=-Xms8m export IBM_JAVA_OPTIONS="-Xmx96m "$IBM_JAVA_OPTIONS export IJO=-Xms8m export IJO="-Xmx96m "$IJO Jerry Whitteridge jerry.whitteri...@albertsons.com Manager Mainframe Systems & HP Non-Stop Albertsons Companies -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Lizette Koehler Sent: Friday, July 17, 2020 9:59 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: EXTERNAL EMAIL: Re: Java memory limit Fixed formatting D OMVS,LIMIT OMVS 0011 ACTIVE OMVS=(00) SYSTEM WIDE LIMITS: LIMMSG=NONE CURRENT HIGHWATER SYSTEM USAGE USAGE LIMIT MAXPROCSYS 200 259 2100 MAXUIDS 26 31 500 MAXPTYS 0 1 800 MAXMMAPAREA 8428 8428 40960 MAXSHAREPAGES 47918 254576 32768000 IPCMSGNIDS 17 20 500 IPCSEMNIDS 11 21 2000 IPCSHMNIDS 3 6 500 IPCSHMSPAGES 0 26 786432 IPCMSGQBYTES --- 7812 2147483647 IPCMSGQMNUM --- 2 10000 IPCSHMMPAGES --- 256 12800 SHRLIBRGNSIZE 111149056 111149056 444596224 SHRLIBMAXPAGES 0 0 65536 MAXUSERMOUNTSYS 0 0 0 MAXUSERMOUNTUSER 0 0 0 MAXPIPES 59 170 15360 Lizette -----Original Message----- From: Lizette Koehler <stars...@mindspring.com> Sent: Friday, July 17, 2020 9:46 AM To: 'IBM Mainframe Discussion List' <IBM-MAIN@LISTSERV.UA.EDU> Subject: RE: Java memory limit I think the answer is it depends. How much memory is available - as I recall JAVA can take it all In OMVS - Ua -limit core file 8192b cpu time 85835 data size unlimited file size unlimited stack size unlimited file descriptors 64000 address space 1657832k memory above bar 2048m from MVS Console - D OMVS,LIMIT OMVS 0011 ACTIVE OMVS=(00) SYSTEM WIDE LIMITS: LIMMSG=NONE CURRENT HIGHWATER SYSTEM USAGE USAGE LIMIT MAXPROCSYS 200 259 2100 MAXUIDS 26 31 500 MAXPTYS 0 1 800 MAXMMAPAREA 8428 8428 40960 MAXSHAREPAGES 47918 254576 32768000 IPCMSGNIDS 17 20 500 IPCSEMNIDS 11 21 2000 IPCSHMNIDS 3 6 500 IPCSHMSPAGES 0 26 786432 IPCMSGQBYTES --- 7812 2147483647 IPCMSGQMNUM --- 2 10000 IPCSHMMPAGES --- 256 12800 SHRLIBRGNSIZE 111149056 111149056 444596224 SHRLIBMAXPAGES 0 0 65536 MAXUSERMOUNTSYS 0 0 0 MAXUSERMOUNTUSER 0 0 0 MAXPIPES 59 170 15360 So depending on how many processes you are going to run, what type of code - simple or complex JAVA could take as much as you can give it Do you have a specific issue you are trying to resolve? Lizette -----Original Message----- From: IBM Mainframe Discussion List < <mailto:IBM-MAIN@LISTSERV.UA.EDU> IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Peter Sent: Friday, July 17, 2020 9:30 AM To: <mailto:IBM-MAIN@LISTSERV.UA.EDU> IBM-MAIN@LISTSERV.UA.EDU Subject: Java memory limit Hello We are running IBM RDZ on zOS 2.3 with java 6. What's the maximum memory limit for java ? Is it based on Java version or zOS version ? 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