-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 All,
This is not Tomcat-related but I figured I'd ask as there are some smart folks here who might be able to give me some good information. As the title suggests, I have suffered an OOME in production with the message "GC overhead limit exceeded". A quick Google search yielded this StackOverflow thread: http://stackoverflow.com/questions/1393486/what-means-the-error-message-java-lang-outofmemoryerror-gc-overhead-limit-excee Evidently, when the GC takes a long time to accomplish nothing, you get this error. This error occurred /once/ at 16:39 EDT and it's 17:39 EDT now and I can see the following heap information from my still-running process: Maximum Memory JVM will use: 190775296 bytes (186304 KiB, 181 MiB) Memory Not yet Allocated to JVM: 0 bytes (0 KiB, 0 MiB) Total Memory Allocated to JVM: 190775296 bytes (186304 KiB, 181 MiB) Free Memory: 21809336 (21298 KiB, 20 MiB) Memory Used by JVM: 168965960 (165005 KiB, 161 MiB) The application appears to be running as expected for now. Is it likely that this was something acute and that my server is okay? Obviously, increasing heap space is probably a good idea in general in this situation as it looks like I simply need more for my user load. Unfortunately, I haven't been keeping GC or other heap records for a while... I'll certainly be restarting that process. The only heap/GC options I've set are: - -Xms192M -Xmx192M All else is the default for this JVM, which is: java version "1.6.0_23" Java(TM) SE Runtime Environment (build 1.6.0_23-b05) Java HotSpot(TM) Server VM (build 19.0-b09, mixed mode) FYI jmap reports: Server compiler detected. JVM version is 19.0-b09 using thread-local object allocation. Parallel GC with 4 thread(s) Heap Configuration: MinHeapFreeRatio = 40 MaxHeapFreeRatio = 70 MaxHeapSize = 201326592 (192.0MB) NewSize = 1048576 (1.0MB) MaxNewSize = 4294901760 (4095.9375MB) OldSize = 4194304 (4.0MB) NewRatio = 2 SurvivorRatio = 8 PermSize = 16777216 (16.0MB) MaxPermSize = 67108864 (64.0MB) Heap Usage: PS Young Generation Eden Space: capacity = 45613056 (43.5MB) used = 15735344 (15.006393432617188MB) free = 29877712 (28.493606567382812MB) 34.49745616693606% used - From Space: capacity = 10551296 (10.0625MB) used = 2172200 (2.0715713500976562MB) free = 8379096 (7.990928649902344MB) 20.587044473020185% used To Space: capacity = 10158080 (9.6875MB) used = 0 (0.0MB) free = 10158080 (9.6875MB) 0.0% used PS Old Generation capacity = 134217728 (128.0MB) used = 129355080 (123.36261749267578MB) free = 4862648 (4.637382507324219MB) 96.37704491615295% used PS Perm Generation capacity = 20316160 (19.375MB) used = 20088520 (19.15790557861328MB) free = 227640 (0.21709442138671875MB) 98.87951266381049% used Any thoughts? Thanks, - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk1bAYEACgkQ9CaO5/Lv0PA9dwCfdmJta/0xqhoHOgFaRlezGl7p 52YAn0QYEK348ZydsLD8TBMpSTnJU/IG =AbM9 -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
