-Xmx16G -Xms8G -Xss256k are your friends.

Cheers.

On Thu, 2015-07-02 at 02:00 -0700, karthikeyan S wrote:
> i tried that Iterating but it only reading 5.5Lks rows only then it produce 
> 
> Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit
> exceeded
>       at java.util.Arrays.copyOfRange(Unknown Source)
>       at java.lang.String.<init>(Unknown Source)
>       at java.lang.StringBuffer.toString(Unknown Source)
>       at
> org.apache.poi.xssf.usermodel.XSSFRichTextString.utfDecode(XSSFRichTextString.java:489)
>       at
> org.apache.poi.xssf.usermodel.XSSFRichTextString.getString(XSSFRichTextString.java:294)
>       at
> org.apache.poi.xssf.usermodel.XSSFCell.getStringCellValue(XSSFCell.java:247)
>       at utils.newexcelreader.readData(newexcelreader.java:82)
>       at utils.newexcelreader.main(newexcelreader.java:39)
> 
> 
> 
> 
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