Decision Insight 20200928 Save PDF Selected topic Selected topic and subtopics All content How to tune JVM memory? Parameters The parameters to be tuned are in the conf/jvm.conf file. Some are already present, and some need to be added in order to be tuned. Parameter name Default value Role Example -Xms 512M Startup memory space for the application. Should not be changed, or set the same value than Xmx to allocate the whole application data memory at startup -Xms1G -Xmx 6G Maximum memory space for the application data that is composed of: cache of persisted data transient data for query executions other runtime data If at a given instant this memory space is undersized then one of the following exceptions will be thrown: java.lang.OutOfMemoryError: Java heap spacejava.lang.OutOfMemoryError: GC overhead limit exceed -Xmx8G -XX:NewRatio 2 Use the following table to use the adequate value (some software architecture changes may revise this table later) -Xmx 4G to 8G 2 (default value) 8G to 12G 3 12G to 16G 4 >16G 5 -XX:NewRatio=4 Related Links
How to tune JVM memory? Parameters The parameters to be tuned are in the conf/jvm.conf file. Some are already present, and some need to be added in order to be tuned. Parameter name Default value Role Example -Xms 512M Startup memory space for the application. Should not be changed, or set the same value than Xmx to allocate the whole application data memory at startup -Xms1G -Xmx 6G Maximum memory space for the application data that is composed of: cache of persisted data transient data for query executions other runtime data If at a given instant this memory space is undersized then one of the following exceptions will be thrown: java.lang.OutOfMemoryError: Java heap spacejava.lang.OutOfMemoryError: GC overhead limit exceed -Xmx8G -XX:NewRatio 2 Use the following table to use the adequate value (some software architecture changes may revise this table later) -Xmx 4G to 8G 2 (default value) 8G to 12G 3 12G to 16G 4 >16G 5 -XX:NewRatio=4