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POJava ParNew Collection moving objects to Old Generation
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2013-12-01T17:06:51.240
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That's my VM arguments: <pre><code>-XX:MaxPermSize=128m -XX:+UseParNewGC -XX:MaxNewSize=1G -XX:NewSize=1G -Xms13G -Xmx13G -XX:SurvivorRatio=128 -XX:MaxTenuringThreshold=0 -XX:+UseTLAB -XX:+UseConcMarkSweepGC -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -Xloggc:./gc.log -cp </code></pre> I have also created memory leak: <pre><code>{ String s = ""; for (int i = 0; i < objectsCount; i++) s += "s" + s; }//Here all created objects should be garbage collected </code></pre> So i have run that part of the code few times and i noticed that most of the objects are moved to Old Generation and only some are collected by small GC <pre><code>832.135: [GC 832.135: [ParNew: 1032095K->0K(1040512K), 0.7309045 secs] 4832264K->4761739K(13623424K), 0.7309703 secs] [Times: user=2.37 sys=0.33, real=0.73 secs] 833.148: [GC 833.148: [ParNew: 826257K->0K(1040512K), 0.1510836 secs] 5587996K->5095138K(13623424K), 0.1511436 secs] [Times: user=0.33 sys=0.00, real=0.15 secs] 833.567: [GC 833.567: [ParNew: 742459K->0K(1040512K), 0.2067575 secs] 5837597K->5836296K(13623424K), 0.2068291 secs] [Times: user=0.75 sys=0.00, real=0.21 secs] 853.490: [GC 853.582: [ParNew: 993475K->0K(1040512K), 0.6963577 secs] 8100247K->7107608K(13623424K), 0.6968597 secs] [Times: user=1.61 sys=0.00, real=0.79 secs] 879.973: [GC 879.973: [ParNew: 1032433K->0K(1040512K), 10.6403908 secs] 8140042K->8061725K(13623424K), 10.6404844 secs] [Times: user=30.93 sys=0.34, real=10.64 secs] </code></pre> I think reason is, too many objects are pasted to memory in the same time so its more convenient for garbage collector to move them from Young Generation or Old Generation. My question is, what should i change in my arguments, to make all of those objects be cleared by Small GC?
Tags
<java><object><garbage-collection>
Title
Java ParNew Collection moving objects to Old Generation
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