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From "Chuck Rolke (JIRA)" <j...@apache.org>
Subject [jira] [Created] (QPID-4403) C++ Broker Timer warnings are still too verbose and frequent
Date Tue, 30 Oct 2012 16:10:12 GMT
Chuck Rolke created QPID-4403:

             Summary: C++ Broker Timer warnings are still too verbose and frequent
                 Key: QPID-4403
                 URL: https://issues.apache.org/jira/browse/QPID-4403
             Project: Qpid
          Issue Type: Improvement
          Components: C++ Broker
    Affects Versions: 0.18
            Reporter: Chuck Rolke

Continuing issue QPID-3476.

1) Further reducing the timer warning message log level.

Between 0.12 and 0.13 timer warning messages were demoted from warning to informational log
levels. In 0.19 the external store produces overrun info messages every time leading to log
file bloat.

The proposal here is to demote the information statements to debug statements for the same
reasons that they were demoted from warnings:

"Demoting the warnings to debug statements would avoid undue alarm and prevent excess noise
in log files. Should there be a need to see the information it is a lot easier to enable it
(--log-enable debug+:Timer) than it is to turn it off at present."

2) Increasing the timer warning interval.

Another consideration is to change the hard-coded five second warning interval to something
longer. I suggest that one minute would be a good choice. The timer warning code already accumulates
the number of warnings for the warning interval to prevent a flood of warnings. Increasing
the warning interval further reduces the flood.

3) Performance improvement.

When Issue 3476 was patched from warning to info there was a corresponding QPID_LOG_TEST in
Timer.cpp that was not patched. This causes the late and overrun calculations to run even
though the results will never be logged.

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