queue builder commits a touch too often

[Daniel Silverstone]

The queue builder was made to commit more often to reduce interlock with the slave scanner.

Unfortunately committing this often causes the queue builder to go slowly.

We should commit every "few" like gina does.

[Daniel Silverstone (dsilvers)]

Presumably this has been done by now or you'd all have gone mad

[Celso Providelo (cprov)]

Not really sorted, queue-builder is still committing more often than necessary.
This topic will need to be revisited once we change the way we create NEEDSBUILD builds to a more 'package-centric' way.
Instead of depending of an hourly overall analysis of all published sources to create missing builds, we could serialize the procedure and create builds as soon as we accept the source.
It should reduce the possibilities of lockstates between slave-scanner & queue-builder, so we could commit only once at the end.
On the other hand it might increase the possibility of unreachable dependencies during build.
We will see.