memory - JMeter OutOfMemoryError

Question

I am facing below OutOfMemor errors, and JMeter stops working....

java.lang.OutOfMemoryError: Java heap space Dumping heap to
    java_pid4412.hprof ... Heap dump file created [591747609 bytes in
    71.244 secs] Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: Java heap space Exception in thread
    "AWT-EventQueue-0" java.lang.OutOfMemoryError: Java heap space
    Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError:
    Java heap space Exception in thread "AWT-EventQueue-0"
    java.lang.OutOfMemoryError: Java heap space

How can it be resolved?
My System is having very good specification like 16GB RAM, 2x Quad Core processors, with 146 GB HDD.

Can anyone help me?

Answer 1

Your Heap dump shows that you are using default JMeter settings of 512 Mo. so even if you have 16gb you are not using them.

Replace default JVM optional in jmeter.bat to the right size:

set HEAP=-server -Xms768m -Xmx768m -Xss128k 

set NEW=-XX:NewSize=1024m -XX:MaxNewSize=1024m

Also look at:

• http://wiki.apache.org/jmeter/JMeterFAQ#JMeter_keeps_getting_.22Out_of_Memory.22_errors.__What_can_I_do.3F

• http://www.ubik-ingenierie.com/blog/jmeter_performance_tuning_tips/