topic WEBDAV and HEAP errors on 3.0Stable in Alfresco Archive

WEBDAV and HEAP errors on 3.0Stable

pescha — Thu, 29 Jan 2009 21:06:29 GMT

Well,I started over with 3.0stable hoping that my problems with getting this heap space to work would be fixed.The installation on xp went smoothly and I was able to boot up alfresco. I then set up a massive localhost webdav transfer, and after 15 min to half hour, I got my heap space "out of memor

Re: WEBDAV and HEAP errors on 3.0Stable

rudischmitz — Fri, 30 Jan 2009 03:37:49 GMT

Try a simple setting first like

-server -Xms640m -Xmx2G -XX:MaxPermSize=128M

I have found that having an installed tomcat Manager setup is good for seeing where your JVM ram is going. Because you can see how the ram is being used as a transaction is going on in tomcat.

under tomcat manager click on the server status on the right. see picture

http://linux-sxs.org/internet_serving/manager.jpg

then you will get this window in the middle it will show jvm settings.

[img]http://linux-sxs.org/internet_serving/status.jpg[/img]

So while uploading a huge file setup hit refresh on this page and it will show you the ram being used by alfresco.

I don't think the windows install sets up the manager pages but maybe i wasn't typing in the correct url.

Re: WEBDAV and HEAP errors on 3.0Stable

pescha — Fri, 30 Jan 2009 17:41:48 GMT

I followed your advice and was able to log in to tomcat manager.

I'm not sure how useful it is because under server status it says that I have a lot more free memory than I probably do.

For example, I set a heap size of 1Gb. Under task manager, I see CPU usage of 100% and 1.23gb of mem usage. Tomcat manager, on the other hand, says that Total memory is 972.81mb, and free memory at 796.54mb.

How can that be? In any case, alfresco just slowly grinds to a halt. This happens if I set up a localhost transfer over Webdav or when I delete an unsuccessful transfer from within alfresco's web interface.

Re: WEBDAV and HEAP errors on 3.0Stable

rudischmitz — Fri, 30 Jan 2009 20:05:01 GMT

How large are the webdav files? how much physical ram is on this XP box/VM?

I have successfully tested WEBDAVing single files that are over 4GB in size to alfresco 2.9c on with postgresql on 64-bit linux.
I could not use the alfresco web client to do over 2GB in size.

I think this makes sense because Tomcat's Java has grabbed around 1 GB of Memory.
So when alfresco starts java (JVM)grabs 1GB of windows Memory and starts doing what it wants with it.
It is JVMs to control and dole out to the tomcat apps running. 972-796=176Mb is being used by alfresco app. The rest is "free" 796Mb ready to be doled out by JVM.
Windows Task Manager sees it as used by java.