Add a logger to profile request execution time
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Key: SEQUOIA-1117
URL: https://forge.continuent.org/jira/browse/SEQUOIA-1117
Project: Sequoia
Type: New Feature
Components: Core
Reporter: Emmanuel Cecchet
Fix For: sequoia 2.10.11, Sequoia 4.0
Right now the only way to get query execution time is to use the monitoring
feature that uses only in-memory stats and can lead to memory outages in the
long run.
This new feature would add a new logger similar to the request logger that
would log timing information about query execution (unlike the current query
arrival time logged in request.log).
I suggest to have a profiling.log file that contains that information and can
also report time for begin/commit/rollback operations. Note that it could also
be interesting to expand the profiling to metadata calls (things like getTables
and so on) but this is currently out of the scope of this feature request.
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