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Posted to issues@activemq.apache.org by "Francesco Nigro (Jira)" <ji...@apache.org> on 2021/01/05 14:03:00 UTC

[jira] [Created] (ARTEMIS-3051) Fix MessageReferenceImpl::getMemoryEstimate

Francesco Nigro created ARTEMIS-3051:
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             Summary: Fix MessageReferenceImpl::getMemoryEstimate
                 Key: ARTEMIS-3051
                 URL: https://issues.apache.org/jira/browse/ARTEMIS-3051
             Project: ActiveMQ Artemis
          Issue Type: Bug
    Affects Versions: 2.16.0
            Reporter: Francesco Nigro
            Assignee: Francesco Nigro


MessageReferenceImpl::memoryOffset is used on MessageReferenceImpl::getMemoryEstimate: it reports 64 bytes.

[https://github.com/openjdk/jol] is reporting 72 bytes for OpenJDK 64 bit using COOPS and 8 bytes alignment, that's very common, and that's a more accurate estimated footprint value.

To be honest, a full-fat 64 bit JVM would use 112 bytes instead, but that could be improved in a bigger follow-up PR.

 



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