On Oct 13, 2009, at 7:03 PM, Vincent Massol wrote: > Hi, > > I've played a bit with Yourkit and a default XE to see the memory > requirements. Here are some preliminary results (more tests needed): > > * After home page loaded: 38MB non-heap, 6377 classes > * After code macro execution: 38 --> 52MB non heap, 8629 classes > <--- a lot > * After groovy macro execution: 52 --> 56MB, 9920 classes > * After treeview + opened top level nodes: 56MB --> 63MB, 10960 > classes <-- a lot > * After Import: 63MB --> 65MB, 13036 classes > * After Export: no change > * After navigating a bit everywhere at random: heap memory needed: > 155MB (used: 132MB), non heap: 65MB, classes: 13078 > * After adding attachment of 1.1MB: almost no change > * After deletion of 1.1MB attachment: used memory from 98MB to > 132MB !! But still within the 155MB allocated heap memory > > Conclusion so far: > ============== > * We need around < 80MB non heap memory and < 200MB heap memory for > the default XE pages and if the user manipulates attachments less > than 1MB. > * The default permgen size is 64MB so we're just above it (65MB). > That's why some users have reported permgen issues I believe. Jython > is eating a lot of it (14MB) > > * After adding a 7.3MB attachment: heap memory max from 155 to 261 > (=>110MB!) > * After removing it, need 297MB heap (even more) > > Second conclusion: > ============== > * Apart from attachments the memory needs seem reasonable IMO (< > 255MB). > * I'd still need to make sure I test all features of the wiki to be > sure > > What more should I test? What should we do to reduce our permgen > needs? Should we reduce it? > > Thanks > -Vincent
BTW a good article on permgen: http://ombhakar.blogspot.com/2007/05/permgen-outofmemory.html Thanks -Vincent _______________________________________________ devs mailing list [email protected] http://lists.xwiki.org/mailman/listinfo/devs
