>>> However, it does not make sense to duplicate what we already have for >>> free, either. >>> If it's not too much trouble, why not remove those as well? >>> >> >> +1 - seems like removing them could help more with like our weird memory >> bloat more than the actual download size no?
Just so everyone is clear about permgen and jars in the classpath (at least on the oracle vm): if a class is not loaded (it's in a jar but never referenced in executing code), it will take up no (consequential) memory The only overhead from a jar being on the classpath (without being actually used directly) is service (META-INF) and spring context scanning, but jar info is cached in the standard java classloader and zip access is fast, so this shouldn't be a primary concern. Other stuff about permgen: - permgen growth is not predictable - classes do not appear to end up there immediately upon load - permgen size per class may vary over time as code is compiled (code is only compiled once it has run a certain number of times) > I actually didn't measure any noticeable difference after removing xerces, > although I was only trying to measure permgen overhead which unfortunately > doesn't give you any information about individual class sizes. At the moment, it doesn't seem to be possible to trace permgen size of a given class. The best rules to reduce permgen bloat are: 1) reduce the number of classes and interfaces loaded, whether real or proxy or otherwise 2) have simpler, smaller methods that result in less byte code and therefore simple/smaller compiled code 3) make sure classes aren't loaded twice (either via difference classloaders - probably not an issue here) With respect to xerces, checking a geoserver heap dump, it is indeed loaded twice - once from the xerces jar, once from the sun repackaging. This should result in something, but will be hard to measure. Either way, I'm a fan of removing things not needed :) -- Ian Schneider OpenGeo - http://opengeo.org Enterprise support for open source geospatial. ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct _______________________________________________ GeoTools-Devel mailing list GeoTools-Devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-devel
