https://issues.apache.org/bugzilla/show_bug.cgi?id=57241
Bug ID: 57241
Summary: POI 3.9 and framework Document Manager is retaining
memory
Product: POI
Version: 3.9-FINAL
Hardware: PC
Status: NEW
Severity: critical
Priority: P2
Component: XSSF
Assignee: [email protected]
Reporter: [email protected]
Today I have performance issues after importing/exporting xlsm templates in my
java web application ( apache,tomcat 6,POI 3.9,java 6,Oracle
database).Uploading an xlsm file is taking 400 MB of memory and the memory is
not totally released.
In total 65 % of the massive JVM memory is being retained by the POI APIs ,
Traditionally POI always known to have a higher memory footprint , it uses a
lot of memory when dealing with large spreadsheets.
Apart from POI, the framework Document Manager class was also retaining 28 %
of the heap memory. I think here the documents which are being imported by the
application are being stored in memory however references for those are being
retained even after import finishes. That's the reason why probably JVM Garbage
Collector is not being able to clean those objects from memory.
Do you have a clue to free this memory?
thank you
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