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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 46774] New: Extreme memory usage in XSSF workbook
Date Thu, 26 Feb 2009 22:48:16 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=46774

           Summary: Extreme memory usage in XSSF workbook
           Product: POI
           Version: 3.5-dev
          Platform: Macintosh
        OS/Version: Mac OS X 10.4
            Status: NEW
          Severity: normal
          Priority: P2
         Component: XSSF
        AssignedTo: dev@poi.apache.org
        ReportedBy: rob@kinesissurvey.com


Using HSSF, a simple test of 10000 rows by 255 columns runs fine with "-Xms128m
-Xmx394m" and is fast.

Using XSSF, the same exact test fails before even getting to 1000 rows, and is
extremely slow. After bumping the memory to "-Xms512m -Xmx2048m", it fails
somewhere between 3000 and 4000 rows.

Please see the attached sample code, which is based on your Timesheet Demo.

Thank you,
Rob

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