how to increase heap size of java cache memory

Question

I'm using berkeley db java edition (Base api) to insert 5 lack rows to db database I already inserted 1000 rows in 200 ms bt i m getting problem in inserting 5 lack rows so i think there is something some paramaeter to set in EnvironmentConfig class or dbconfig class

error like:

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
    at java.util.Arrays.copyOfRange(Unknown Source)
    at java.lang.String.<init>(Unknown Source)
    at java.io.BufferedReader.readLine(Unknown Source)
    at java.io.BufferedReader.readLine(Unknown Source)
    at WriteDataBase.main(WriteDataBase.java:29)

Increase heap size? Google is your friend http://tinyurl.com/6g3gvx9 — Kal, Jul 01 '11 at 15:24
possible duplicate of [Problem in writing record to Berkeley DB](http://stackoverflow.com/questions/6549610/problem-in-writing-record-to-berkeley-db) .... asked a few minutes ago. — Stephen C, Jul 01 '11 at 15:29

score 1 · Answer 1 · answered Jul 01 '11 at 17:58

You just need to increase the maximum heap size of your JVM. Add -Xmx512m to your startup options. For example, if your application is in a jar file:

java -Xmx512m -jar yourjarfile.jar

Or if you are executing the class directly:

java -Xmx512m com.whatever.YourClassName

The 512m means to set a maximum heap size of 512 Megabytes. That may be too big or too little, depending on your application, so you will need to experiment.

how to increase heap size of java cache memory

1 Answers1