Hi, We have experienced performance problems when configuring an SLD to provide contours for a DEM that is displayed as an OpenLayers layer. GeoServer (2.15.2) is running on Windows Server 2008 R2 with Intel® Xeon® Processor E5-2667 v2 (16 CPU cores) with 32GB of RAM. GeoServer is running on a separate Tomcat (9.0.22) instance, the max memory pool size is set to 16GB.
What we are experiencing is that having Openlayers draw contours dynamically really eats up the memory as we pan around drawing contours we are observing the memory usage increase and the CPU usage is spiking on all cores. Eventually the drawing of contours hangs and then we begin to get broken tiles grid. The used physical memory is at 90% even with this single user test. The final outcome is that the tomcat process is hanging completely and we can't stop the service in a regular way, just by killing the process. Any suggestions to work around this would be highly appreciated. Thanks, Tamas
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