WMS Performance degrades after >20000 requests served
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Key: GEOS-3600
URL: http://jira.codehaus.org/browse/GEOS-3600
Project: GeoServer
Issue Type: Bug
Affects Versions: 2.0-RC2
Environment: tomcat6, ubuntu, java 1.6, AMD 2 core, 6GB ram, postgisng
and also on macosx budle, postgisng (macports),
Reporter: Thomas
Assignee: Andrea Aime
I tested tile generation on maxosx and tomcat6/LINUX (2GB java heap) in both
cases I used the system to generate 300000 tiles sequentially from postgis over
the whole map in different zooms. Somehow GeoServer leaks memory and fills up
the 2GB heap. If that happens, WMS tile generation speed drops slowly down
from, for example, 100 per minute to 5 per minute but still uses 100% CPU. At
that point most of the java memory is full.
Speed can be reclaimed temporarily (about 20000 more tiles) by going to the
Status page and clearing the Resource Cache followed by several clicks on Free
Memory. If memory congestion is too bad, the Status page takes forever to open
and resetting memory becomes difficult. Geoserver needs intervention about
every 30 minutes to 1h depending on available memory.
A workaround would be an automated way to invoke these cleanup functions after
a specific number of requests.
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