Benoit Tellier created JAMES-3191:
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Summary: Key registration is slow
Key: JAMES-3191
URL: https://issues.apache.org/jira/browse/JAMES-3191
Project: James Server
Issue Type: Improvement
Components: eventbus, IMAPServer
Affects Versions: master
Reporter: Benoit Tellier
We noticed that on *master* SELECT IMAP command is significatively slow
(several minutes) on top of the distributed profile. (See attached
instrumentation average time and percentiles)
A quick performance review links this to listener registration (by key).
A code review leads to:
- The low channel number (3) maybe this count can be safely raised to a higher
number? Like 10? Maybe even configurable?
- EventBus::Register operation is handling IO but is synchronous. The reactor
scheduler backing it up is unspecifed (thus is likely the parrallel one). We
should let the caller specify the scheduler he whishes to run.
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