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Many objects with data are created and destroyed in memory while streaming. Therefore, it is recommended to allocate at least 1/2 of server physical memory for Java memory heap. For example, if server RAM is 32 Gb, then it is recommended to allocate 16 Gb with the following settings in wcs-core.properties file:

-Xmx16g
-Xms16g

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Garbage collector (GC) is an important part of Java VM. When GC is running, it dramatically increases the server load and may stop execution of other tasks; therefore, it is recommended to minimize the number of GC invocations using the following settings in wcs-core.properties file:

#Disable heuristic rules
-XX:+UseCMSInitiatingOccupancyOnly

#Reduce Old Gen threshold
-XX:CMSInitiatingOccupancyFraction=70

# Use System.gc() concurrently in CMS
-XX:+ExplicitGCInvokesConcurrent

# Disable System.gc() for RMI, for 10000 hours
-Dsun.rmi.dgc.client.gcInterval=36000000000
-Dsun.rmi.dgc.server.gcInterval=36000000000

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