[
https://issues.apache.org/jira/browse/AMQ-7086?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Gary Tully resolved AMQ-7086.
-----------------------------
Resolution: Fixed
new kahaDB boolean attribute:
cleanupOnStop - default to true as before.
When disabled, the gc/cleanup iteration on broker stop won't happen, which will
speed up shutdown.
Use case is with really large db or scheduler db where total index traversal is
not cheap.
> KahaDB - optionally perform expensive gc run on shutdown
> --------------------------------------------------------
>
> Key: AMQ-7086
> URL: https://issues.apache.org/jira/browse/AMQ-7086
> Project: ActiveMQ
> Issue Type: Bug
> Components: KahaDB
> Affects Versions: 5.15.0
> Reporter: Gary Tully
> Assignee: Gary Tully
> Priority: Major
> Fix For: 5.16.0
>
>
> when looking at the speed of broker.stop with kahadb and the scheduler store.
> There is a full gc run, which can be expensive as the whole index needs to be
> traversed.
> Fast stop/restart is important for fast failover. Leaving gc for runtime,
> where it has an effect on latency in the normal way, rather than
> availability, is better.
>
> I am wondering if there is a use case for gc only at shutdown if the
> cleanupInterval <= 0, indicating that there were no gc at runtime. The
> alternative is adding another boolean to the config or adding that back in if
> the need arises.
> I am leaning towards just removing the gc call during shutdown.
>
> Note: matching the indexCacheSize to the index file size, trading off with
> memory, does help to speed up the index (read) traversal.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
