Could not reserve enough space for object heap

Question

I am getting the following exception repeatedly each time I try to run the program.

Error occurred during initialization of VM

Could not reserve e

Answer 1

In CASSANDRA_HOME/bin/cassandra.bat you would find following configuration

REM JVM Opts we'll use in legacy run or installation
set JAVA_OPTS=-ea^
 -javaagent:"%CASSANDRA_HOME%\lib\jamm-0.3.0.jar"^
 -Xms**2G**^
 -Xmx**2G**^

You can reduce 2G to some smaller number for e.g. 1G or even lesser and it should work.

Same if you are running on unix box, change in .sh file appropriately.