This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I have written a standalone java program that fetches records from the database and calculates the checksum of each table.
The problem I am facing is with tables containing huge data sets, my program resutls in an Out of Memory error.
Below is the error that I get when I run the program with following options :
java -Xms256m -Xmx1536m DatabaseCheck.DBCheckSum
JVMDG303: JVM Requesting Java core file
JVMDG304: Java core file written to /opt/projects/gsd/java/DatabaseCheck/javacore430152.1231233966.txt
JVMDG274: Dump Handler has Processed OutOfMemory.
JVMST109: Insufficient space in Javaheap to satisfy allocation request
Exception in thread "main" java.lang.OutOfMemoryError
I have tried using setFetchSize(Integer.MIN) method to limit the number of records retrieved but this approach also does not work.
Below is sample code of my program:
If anybody can help me with this then it will be great!