"error while loading plugins" "java heap space" while trying to view/install plugins

[andrey dmitriev]

What param to tweak?

Been impossible to see/upgrade/install plugins lately.

[Wojciech Seliga · Accepted solution]

What Java memory settings your Confluence instance run with? If they the memory allocated for your JVM is not big (e.g. below 512MB for heap size and 256MB for permgen size), I would recommend increasing your heap memory (-Xmx settings by 100m or so) and your permgen size by 50m or so. See http://confluence.atlassian.com/display/DOC/Fix+Out+of+Memory+Errors+by+Increasing+Available+Memory It's also recommended to see if you have the latest version of Universal Plugin Manager and if not, upgrade it.

[Jeremy Largman]

The error message specifically says heap, so it seems like heap space, but in general with plugin loading you see PermGen errors. make sure it's not this:

http://confluence.atlassian.com/display/CONFKB/Confluence+Crashes+Due+to+%27java.lang.OutOfMemoryError+PermGen+space%27+Error

[andrey dmitriev]

our settings: -Xms256m -Xmx512m -XX:MaxPermSize=256m ..

How does one determine optimum size for these? We don't have that many users, but a relatively large set of plugins

<th colspan="2" width="90%">Java VM Memory Statistics</th>

Heap Memory	16 % Free
Maximum Heap Size	488 MB
Total Allocated Memory	488 MB
Used Memory	411 MB
Free Allocated Memory	77 MB
Total Free Memory	77 MB
Permanent Generation Memory	32 % Free
Maximum PermGen	256 MB
Used PermGen	174 MB

[Sheppe Pharis]

Did you recently install or upgrade a plugin (UPM in particular)? I got this behavior after updating the Universal Plugin Manager to the latest version. I restored a backup and haven't had a problem since I've been avoiding that particular plugin upgrade.

[Andrew Frayling]

I normally set both -Xms1024m and -Xmx1024m. Setting minimum and maximum to the same value means the app server grabs 1GB for the heap and doesn't have to worry about resizing.