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I'm doing automation tool for ETL testing. It will extract data from an Oracle database and paste in Microsoft Excel and compare source-target based on the key columns.

While generating report, if the records exceeds 8000 it hits an exception:

Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: Java heap space

Have also increased the Heap memory size to -Xmx1524m which didn't work. If i increase it more than 1524m, Eclipse is not opening.

Michael
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Prabhu raam
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  • Run your program with VM argus : -Xms1024m -Xmx2048m – Hus Mukh Apr 06 '17 at 08:41
  • You can do it by right click Run Configuration in your main class : select tab - Arguments , paste this : -Xms1024m -Xmx2048m in bottom panel of VM arguments – Hus Mukh Apr 06 '17 at 08:43
  • Possible duplicate of [How to deal with "java.lang.OutOfMemoryError: Java heap space" error (64MB heap size)](http://stackoverflow.com/questions/37335/how-to-deal-with-java-lang-outofmemoryerror-java-heap-space-error-64mb-heap) – Michael Apr 06 '17 at 10:29

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