> -----Original Message----- > From: Dustin M. Snell [mailto:[EMAIL PROTECTED] > Sent: Monday, December 17, 2007 11:44 PM > To: CF-Talk > Subject: Re: memory issues > > We have the same issue. Sometimes jrun freezes as well. I suspect > though that it may not be a problem (the memory usage) as it may just > be set up to use all available memory for speed (caching etc) just > like .net, SQL server and vista. But if there is a shortage they may > "give back". I have no proof of this however. So give it lots of ram. > It's cheap enough these days.
This is common of Enterprise apps - there's an unspoken assumption that resources are there for "you" (the app) so many apps (CF included) tend to grab resources early and hold on longer than they might (the assumption being "I needed it once...") As others have noted explicitly destroying variables when you're done with them can provide much needed "hint" to virtual machine. Remember that Java Garbage Collection doesn't run constantly - only once in awhile (it tries to wait for slow times -it may only run every few minutes). Also look at your machine: does it have enough RAM? If so is CF/Java able to use it? If you're getting Java "out of memory" errors on a machine that's otherwise running fine (and has memory to spare) you might want to try and give Java more space. The setting you want is in the CF Admin and is "Heap Size". Here's a decent article that goes over the background of the issue and how to think about it for CF apps: http://labs.fusionlink.com/katapult/index.cfm?page=articles/jvmtuning Considering your application - which is kind of odd in this space and probably needs to be tuned very differently that the assumed defaults - you wants lots of RAM (to store all those documents in memory) and you want to increase the heap size so that Java can use the memory. Definitely look at your app and consider ways to decrease the space needed per session, but also make sure that you're using the resources you have - there's no point in crashing with "out of memory" when there might be another Gig of RAM sitting idle just because of a stupid setting in the admin. ;^) Jim Davis ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;160198600;22374440;w Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:294982 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
