java - Outof memory error while working on large dataset

Question

I am running a code on LSI, which requires first fetching a lot of data from database. It is working fine for small data-set. As, i increase the data-set, it gives me the following error.

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space

I am currently running the code on system having 2 GB of RAM. Is the error related to RAM capacity or due to something else.

Thanks!

Answer 1

When you run Java you'll have to pass VM parameters for your specific concerns. You need to increase heap values:

-Xms40m - minimum heap size in MB
-Xmx1024m - maximum heap size in MB

java test.java -Xms40m -Xmx1024m

when launching your app. For more information refer Oracle documentation. Or if you use Eclipse increase this size in ecliplse.ini file.