Hi Kohsuke,
Thanks for your response. I am attaching the schema its not very large
however on peak day load we might parse upto 500000 XML per day. Our
application uses Message Driven bean in Websphere 5.1.1 on AIX using jdk
1.4.2. We are using jaxb 1.0 I think this the what is see in manifest in
jaxb-libs.jar
Specification-Version: 1.0
Specification-Vendor: Sun Microsystems, Inc.
Implementation-Title: JAXB Reference Implementation
Implementation-Version: 1.0
Please let me know if you can think of any other recommendation
Thanks and Regards,
kesavan
>From: Kohsuke Kawaguchi <Kohsuke.Kawaguchi_at_Sun.COM>
>Reply-To: users_at_jaxb.dev.java.net
>To: users_at_jaxb.dev.java.net
>Subject: Re: InterleaveExp object growth
>Date: Thu, 17 Feb 2005 09:14:38 -0800
>
>Kesavan T.S wrote:
>>Hi,
>>In our applications heap dump during OutOfMemory errors we consistently
>>see the following JAXB related objects :
>>Count Total-size Type Name
>>-------------------------------------------------------------------------------
>>4,617,766 184,710,640 com/sun/msv/grammar/InterleaveExp
>>42 85,121,184 array of
>>com/sun/msv/grammar/Expression
>>144,490 4,623,680
>>com/sun/msv/verifier/regexp/OptimizationTag
>>154,803 3,715,272 com/sun/msv/util/StringPair
>>154,679 3 ,712,296
>>com/sun/msv/verifier/regexp/OptimizationTag$OwnerAndCont
>
>I'd like to learn the schema you are using, so that we can put that into
>2.0 unit test.
>
>>Will using a single instance of JAXBContext and pooling Marshallers help
>>to resolve this.
>
>Definitely share the single JAXBContext instance please. Especially if your
>schema is big, JAXBContext would be quite large, and it will take a lot of
>time to create it.
>
>JAXBContext is thread safe. You only need one instance in your whole
>application.
>
>Marshaller can be pooled and recycled, but that shouldn't impact the memory
>foot print that much. Pooling of marshaller is something you consider only
>when you are really performance sensitive.
>
>>I would really appreciate if anyone can recommend how to resolve as we are
>>forced to recycle our 24/7 application.
>
>
>
>--
>Kohsuke Kawaguchi
>Sun Microsystems kohsuke.kawaguchi_at_sun.com
>
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