Is this GC.log summary indicating memory leak ?
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From: Krist on 18 Feb 2010 12:01 On 18 Feb, 22:39, Lew <no...(a)lewscanon.com> wrote: > Krist wrote: > > From the output below, is there any sign of memory leak ? > > There is no sign of a memory "leak". > There is no sign of a lack of a memory "leak". > > -- > Lew Hi sir, What can be the signs, if indeed there is the "leak" ? Thank you, Krist
From: RedGrittyBrick on 18 Feb 2010 12:54 On 18/02/2010 17:01, Krist wrote: > On 18 Feb, 22:39, Lew<no...(a)lewscanon.com> wrote: >> Krist wrote: >>> From the output below, is there any sign of memory leak ? >> >> There is no sign of a memory "leak". >> There is no sign of a lack of a memory "leak". >> > > What can be the signs, if indeed there is the "leak" ? > Firstly, I think you may mean what some people call packratting rather than the usual meaning of "memory leak". <http://mindprod.com/jgloss/packratting.html> Secondly, because you started this discussion, I imagine you already have some sign that you consider indicative of a "memory leak". What sign was that? If I obtained that GCViewer output on four successive days and found that FootPrint was monotonically increasing, I'd feel it was a sign of something that might need investigation. Some ideas here on "How to search for leaks" http://groups.google.com/group/comp.lang.java.programmer/browse_thread/thread/16d16e4f9b7d9509/4a58432ba88fa526 -- RGB
From: John B. Matthews on 18 Feb 2010 14:44 In article <4b7d7eba$0$2486$db0fefd9(a)news.zen.co.uk>, RedGrittyBrick <RedGrittyBrick(a)spamweary.invalid> wrote: > On 18/02/2010 17:01, Krist wrote: > > On 18 Feb, 22:39, Lew<no...(a)lewscanon.com> wrote: > >> Krist wrote: > >>> From the output below, is there any sign of memory leak ? > >> > >> There is no sign of a memory "leak". > >> There is no sign of a lack of a memory "leak". > > > > What can be the signs, if indeed there is the "leak" ? > > Firstly, I think you may mean what some people call packratting > rather than the usual meaning of "memory leak". > <http://mindprod.com/jgloss/packratting.html> > > Secondly, because you started this discussion, I imagine you already > have some sign that you consider indicative of a "memory leak". What > sign was that? > > If I obtained that GCViewer output on four successive days and found > that FootPrint was monotonically increasing, I'd feel it was a sign > of something that might need investigation. > > Some ideas here on "How to search for leaks" > http://groups.google.com/group/comp.lang.java.programmer/browse_thread/thread/16d16e4f9b7d9509/4a58432ba88fa526 For reference, I have updated the graphs mentioned in that thread: <http://sites.google.com/site/trashgod/garbageheap> -- John B. Matthews trashgod at gmail dot com <http://sites.google.com/site/drjohnbmatthews>
From: Krist on 19 Feb 2010 00:36 On 19 Feb, 00:54, RedGrittyBrick <RedGrittyBr...(a)spamweary.invalid> wrote: > On 18/02/2010 17:01, Krist wrote: > > > On 18 Feb, 22:39, Lew<no...(a)lewscanon.com> wrote: > >> Krist wrote: > >>> From the output below, is there any sign of memory leak ? > > >> There is no sign of a memory "leak". > >> There is no sign of a lack of a memory "leak". > > > What can be the signs, if indeed there is the "leak" ? > > Firstly, I think you may mean what some people call packratting rather > than the usual meaning of "memory leak". > <http://mindprod.com/jgloss/packratting.html> > > Secondly, because you started this discussion, I imagine you already > have some sign that you consider indicative of a "memory leak". What > sign was that? > > If I obtained that GCViewer output on four successive days and found > that FootPrint was monotonically increasing, I'd feel it was a sign of > something that might need investigation. > > Some ideas here on "How to search for leaks"http://groups.google.com/group/comp.lang.java.programmer/browse_threa... > > -- > RGB Hi Sir, The sign is : intermittently, the JVM got not responding and the apps server restart it. That is the sign that make me think that what cause the JVM restart : Memory leak ? Full GC ? Setting the Heap not correct : -ms3072M -mx3072M -XX: +UseConcMarkSweepGC -XX:+UseParNewGC - XX:MaxPermSize=1024M ??? What may cause the JVM to no responding ? Thank you, Krist
From: Krist on 19 Feb 2010 00:54
On 19 Feb, 12:36, Krist <krisl...(a)gmail.com> wrote: > On 19 Feb, 00:54, RedGrittyBrick <RedGrittyBr...(a)spamweary.invalid> > wrote: > > > > > On 18/02/2010 17:01, Krist wrote: > > > > On 18 Feb, 22:39, Lew<no...(a)lewscanon.com> wrote: > > >> Krist wrote: > > >>> From the output below, is there any sign of memory leak ? > > > >> There is no sign of a memory "leak". > > >> There is no sign of a lack of a memory "leak". > > > > What can be the signs, if indeed there is the "leak" ? > > > Firstly, I think you may mean what some people call packratting rather > > than the usual meaning of "memory leak". > > <http://mindprod.com/jgloss/packratting.html> > > > Secondly, because you started this discussion, I imagine you already > > have some sign that you consider indicative of a "memory leak". What > > sign was that? > > > If I obtained that GCViewer output on four successive days and found > > that FootPrint was monotonically increasing, I'd feel it was a sign of > > something that might need investigation. > > > Some ideas here on "How to search for leaks"http://groups.google.com/group/comp.lang.java.programmer/browse_threa... > > > -- > > RGB > > Hi Sir, > The sign is : intermittently, the JVM got not responding and the apps > server restart it. That is the sign that make me think that what cause > the JVM restart : > > Memory leak ? > Full GC ? > Setting the Heap not correct : -ms3072M -mx3072M -XX: > +UseConcMarkSweepGC -XX:+UseParNewGC - > XX:MaxPermSize=1024M ??? > > What may cause the JVM to no responding ? > > Thank you, > Krist- Sembunyikan teks kutipan - > > - Perlihatkan teks kutipan - Hi, I Forget to include the error in log file when the JVM restart : there is 'Too many open files' error. 10/02/08 05:34:40 oracle.ias.opmn.optic.OpticBadConnectException: Error connecting to OPMN (is it running?): Too many open files 10/02/08 05:34:40 at oracle.ias.opmn.optic.OpmnPhone.dialOpmn(OpmnPhone.java:451) 10/02/08 05:34:40 at oracle.ias.opmn.optic.OpmnPhone.makePhoneCall(OpmnPhone.java:178) 10/02/08 05:34:40 at oracle.ias.opmn.optic.OpmnPhone.request(OpmnPhone.java:130) 10/02/08 05:34:40 at oracle.ias.opmn.optic.OpmnQuery.getBuf(OpmnQuery.java:347) 10/02/08 05:34:40 at oracle.ias.opmn.optic.OpmnQuery.getDom(OpmnQuery.java:467) 10/02/08 05:34:40 at oracle.ias.opmn.optic.OpmnQuery.getProc(OpmnQuery.java:615) 10/02/08 05:34:40 at oracle.dms.address.Optic.getAddresses(Unknown Source) 10/02/08 05:34:40 at oracle.dms.address.OpmnDiscoverer.getAddresses(Unknown Source) 10/02/08 05:34:40 at oracle.dms.address.Discoverer.searchAddresses(Unknown Source) 10/02/08 05:34:40 at oracle.dms.address.AddressBook.discoverAddresses(Unknown Source) 10/02/08 05:34:40 at oracle.dms.collector.Hunter.setOff(Unknown Source) 10/02/08 05:34:40 at oracle.dms.aggregator.Timer.run(Unknown Source) 10/02/08 05:34:40 at java.lang.Thread.run(Thread.java:595) 10/02/08 05:34:51 oracle.ias.opmn.optic.OpticBadConnectException: Error reading formFactorFile: /opt/oracle/product/10.1.3.1/OracleAS_1/ opmn/conf/.formfactor (/opt/oracle/product/10.1.3.1/OracleAS_1/opmn/ conf/.formfactor (Too many open files)) 10/02/08 05:34:51 at oracle.ias.opmn.optic.OpmnPhone.refreshFormFactor(OpmnPhone.java:328) 10/02/08 05:34:51 at oracle.ias.opmn.optic.OpmnPhone.refreshConnectionInfo(OpmnPhone.java: 278) 10/02/08 05:34:51 at oracle.ias.opmn.optic.OpmnPhone.makePhoneCall(OpmnPhone.java:174) 10/02/08 05:34:51 at oracle.ias.opmn.optic.OpmnPhone.request(OpmnPhone.java:130) 10/02/08 05:34:51 at oracle.ias.opmn.optic.OpmnQuery.getBuf(OpmnQuery.java:347) 10/02/08 05:34:51 at oracle.ias.opmn.optic.OpmnQuery.getDom(OpmnQuery.java:467) 10/02/08 05:34:51 at oracle.ias.opmn.optic.OpmnQuery.getProc(OpmnQuery.java:615) 10/02/08 05:34:51 at oracle.dms.address.Optic.getAddresses(Unknown Source) 10/02/08 05:34:51 at oracle.dms.address.OpmnDiscoverer.getAddresses(Unknown Source) 10/02/08 05:34:51 at oracle.dms.address.Discoverer.searchAddresses(Unknown Source) 10/02/08 05:34:51 at oracle.dms.address.AddressBook.discoverAddresses(Unknown Source) 10/02/08 05:34:51 at oracle.dms.collector.Hunter.setOff(Unknown Source) 10/02/08 05:34:51 at oracle.dms.aggregator.Timer.run(Unknown Source) 10/02/08 05:34:51 at java.lang.Thread.run(Thread.java:595) 10/02/08 05:35:25 oracle.ias.opmn.optic.OpticBadConnectException: Error reading formFactorFile: /opt/oracle/product/10.1.3.1/OracleAS_1/ opmn/conf/.formfactor (/opt/oracle/product/10.1.3.1/OracleAS_1/opmn/ conf/.formfactor (Too many open files)) 10/02/08 05:35:25 at oracle.ias.opmn.optic.OpmnPhone.refreshFormFactor(OpmnPhone.java:328) 10/02/08 05:35:25 at oracle.ias.opmn.optic.OpmnPhone.refreshConnectionInfo(OpmnPhone.java: 278) 10/02/08 05:35:25 at oracle.ias.opmn.optic.OpmnPhone.makePhoneCall(OpmnPhone.java:174) 10/02/08 05:35:25 at oracle.ias.opmn.optic.OpmnPhone.request(OpmnPhone.java:130) 10/02/08 05:35:25 at oracle.ias.opmn.optic.OpmnQuery.getBuf(OpmnQuery.java:347) 10/02/08 05:35:25 at oracle.ias.opmn.optic.OpmnQuery.getDom(OpmnQuery.java:467) 10/02/08 05:35:25 at oracle.ias.opmn.optic.OpmnQuery.getProc(OpmnQuery.java:615) 10/02/08 05:35:25 at oracle.dms.address.Optic.getAddresses(Unknown Source) 10/02/08 05:35:25 at oracle.dms.address.OpmnDiscoverer.getAddresses(Unknown Source) 10/02/08 05:35:25 at oracle.dms.address.Discoverer.searchAddresses(Unknown Source) 10/02/08 05:35:25 at oracle.dms.address.AddressBook.discoverAddresses(Unknown Source) 10/02/08 05:35:25 at oracle.dms.collector.Hunter.setOff(Unknown Source) 10/02/08 05:35:25 at oracle.dms.aggregator.Timer.run(Unknown Source) 10/02/08 05:35:25 at java.lang.Thread.run(Thread.java:595) Thanks, Krist |