Is it right for Garbage Collection to run every 60 sec., as regular as clockwork?
(CFMX 6.1 server, with updater, Solaris 8. JVM settings: -server -Dsun.io.useCanonCaches=false -XX:MaxPermSize=256m -XX:+UseParallelGC -Djavax.xml.parsers.SAXParserFactory=com.macromedia.crimson.jaxp.SAXParserFactoryImpl -Djavax.xml.parsers.DocumentBuilderFactory=com.macromedia.crimson.jaxp.DocumentBuilderFactoryImpl -XX:+PrintGCTimeStamps -XX:+PrintHeapAtGC -XX:+PrintGCDetails -Xms256m -Xmx768m) I'm trying to decide if what I'm seeing is right: - first unloaded classes after running for 13 min. - PSPermGen getting to 98% but not increasing size to what's available (MaxPermSize=256m) - 'from space' in PSYoungGen regularly filling, appears to be causing the GC. - GC runs every 60 sec. - PSOldGen gets the most space of the heap, but 'from space' in PSYoungGen is what *needs* the space. - NOTE: this is with the server idle. Now I need to see it under load. thanks, Chris Norloff ---------------------------------------------- Heap PSYoungGen total 87168K, used 84000K [0xb9000000, 0xbe550000, 0xc9000000) eden space 3008K, 0% used [0xb9000000,0xb9000000,0xb92f0000) from space 84160K, 99% used [0xb92f0000,0xbe4f8000,0xbe520000) to space 192K, 0% used [0xbe520000,0xbe520000,0xbe550000) PSOldGen total 174784K, used 6449K [0xc9000000, 0xd3ab0000, 0xe9000000) object space 174784K, 3% used [0xc9000000,0xc964c5a8,0xd3ab0000) PSPermGen total 16640K, used 16453K [0xe9000000, 0xea040000, 0xf9000000) object space 16640K, 98% used [0xe9000000,0xea011630,0xea040000) 15399.411: [Full GC 90449K->6460K(261952K), 0.6580179 secs] Heap after GC invocations=510: ------------------------------------------------------------ - just like clockwork. this is obviously the established pattern. PSYoungGen total 87232K, used 84136K [0xb9000000, 0xbe550000, 0xc9000000) eden space 3008K, 0% used [0xb9000000,0xb9000000,0xb92f0000) from space 84224K, 99% used [0xb92f0000,0xbe51a010,0xbe530000) to space 128K, 0% used [0xbe530000,0xbe530000,0xbe550000) PSOldGen total 174784K, used 6136K [0xc9000000, 0xd3ab0000, 0xe9000000) object space 174784K, 3% used [0xc9000000,0xc95fe3a8,0xd3ab0000) PSPermGen total 16640K, used 16465K [0xe9000000, 0xea040000, 0xf9000000) object space 16640K, 98% used [0xe9000000,0xea014600,0xea040000) 64676.110: [Full GC 90272K->6157K(262016K), 0.6643557 secs] Heap after GC invocations=2134: ---------------------------------------------------------------- PSYoungGen total 86976K, used 83817K [0xb9000000, 0xbe550000, 0xc9000000) eden space 3008K, 0% used [0xb9000000,0xb9000000,0xb92f0000) from space 83968K, 99% used [0xb92f0000,0xbe4ca6c8,0xbe4f0000) to space 384K, 0% used [0xbe4f0000,0xbe4f0000,0xbe550000) PSOldGen total 174784K, used 6955K [0xc9000000, 0xd3ab0000, 0xe9000000) object space 174784K, 3% used [0xc9000000,0xc96caea8,0xd3ab0000) PSPermGen total 17664K, used 17337K [0xe9000000, 0xea140000, 0xf9000000) object space 17664K, 98% used [0xe9000000,0xea0ee670,0xea140000) 71170.151: [Full GC 90773K->7168K(261760K), 1.0508560 secs] Heap after GC invocations=2348: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Logware (www.logware.us): a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:207015 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
