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https://issues.apache.org/jira/browse/AMQ-3242?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Liguori updated AMQ-3242:
--------------------------------
Description:
The default prefetch size limit for topics is noted as 32766;
http://activemq.apache.org/performance-tuning.html
The FUSE source documentation
(http://fusesource.com/docs/broker/5.4/tuning/index.html) states, "Default
prefetch limit is 32766. The default limit of 32766 is the largest value of a
short and is the maximum possible value of the prefetch limit.".
The largest value for a short actually is 32767
(http://java.sun.com/docs/books/jls/second_edition/html/typesValues.doc.html).
This is really a trivial issue, but should the default prefetch limit for
topics be changed from 32766 to 32767 to reflect the actual ceiling?
And of course, I would recommend changing the default to 32767, when the
maximum has been exceeded. The following warning shows the applied default of
32766:
16:22:40 WARN maximum prefetch limit has been reset from 50000 to 32766
was:
The default prefetch size limit for topics is noted as 32766;
http://activemq.apache.org/performance-tuning.html
The FUSE source documentation
(http://fusesource.com/docs/broker/5.4/tuning/index.html) states, "Default
prefetch limit is 32766. The default limit of 32766 is the largest value of a
short and is the maximum possible value of the prefetch limit.".
The largest value for a short actually is 32767
(http://java.sun.com/docs/books/jls/second_edition/html/typesValues.doc.html).
This is really a trivial issue, but should the default prefetch limit for
topics be changed from 32766 to 32767 to reflect the actual ceiling?
> Change prefetch size limit for topics from 32766 to 32767
> ---------------------------------------------------------
>
> Key: AMQ-3242
> URL: https://issues.apache.org/jira/browse/AMQ-3242
> Project: ActiveMQ
> Issue Type: Improvement
> Reporter: Robert Liguori
> Priority: Trivial
>
> The default prefetch size limit for topics is noted as 32766;
> http://activemq.apache.org/performance-tuning.html
> The FUSE source documentation
> (http://fusesource.com/docs/broker/5.4/tuning/index.html) states, "Default
> prefetch limit is 32766. The default limit of 32766 is the largest value of a
> short and is the maximum possible value of the prefetch limit.".
> The largest value for a short actually is 32767
> (http://java.sun.com/docs/books/jls/second_edition/html/typesValues.doc.html).
> This is really a trivial issue, but should the default prefetch limit for
> topics be changed from 32766 to 32767 to reflect the actual ceiling?
> And of course, I would recommend changing the default to 32767, when the
> maximum has been exceeded. The following warning shows the applied default
> of 32766:
> 16:22:40 WARN maximum prefetch limit has been reset from 50000 to 32766
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