On Mon, Oct 11, 2010 at 2:48 PM, Luca Tettamanti <kronos...@gmail.com> wrote:
> Hello,
> while trying out the statistics plugin (with kopete 4.5.1) I've
> noticed a big delay (about 40-50 seconds) when quitting the
> application, associated with a disk storm.
> When kopete is closing it changes the online status of each contact to
> "Unknown"; this change triggers an INSERT for each contact into the
> statistics DB which - with the default auto-commit behaviour - result
> in a fsync of the DB. The other bottleneck is the tear down of the
> statisticsContactMap which triggers multiple updates per each contact.
> I tested a few modifications that greatly improved the performance:
> * expose transaction control from StatisticsDB
> * batch the UPDATEs in the destructor of the plugin into a single transaction
> * override plugin's aboutToUnload: disconnect from status update and
> manually set to "Unknown" the status of all the contacts in a single
> batch.
>
> I already have quick&dirty patch, tested with positive result. Do you
> think that the changes are acceptable?
>
> Luca

We don't know unless you post a patch to reviewboard.
--
Matt
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