Details
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Improvement
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Status: Open
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Minor
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Resolution: Unresolved
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None
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None
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None
Description
BundleDB PMs keeps connection open in autoCommit mode and during every store operation turn off/on this flag introducing some overhead.
'... the reason is that in a clustered environment, the 'select' statements
must be committed as well, otherwise the tables remain locked. and
instead of explicitly commit each time after a read, we used the
autocommit as default and switch it off during store ...'
We could add additional parameter which allows to configure autoCommit mode, by default it could work as before, but specifing additional parameter will change the behaviour.
It's hard to say about exact numbers how much overhead it is, there are to many variables (network speed/latency, db server type, jdbc driver, change log size). For sure it means 2 extra network calls, which could be easily avoided.
See attached example screen from JProfiler using MSSQL server, and small change logs; overhead is about 20%. Doing simple checkin on versionable node it could be even 40%.
