alphagov/transition — pull request #441 by rgarner (2014-10-27 16:36:14+00:00)
Title: Async commit of hits

* Improves write performance of hits import by setting
`synchronous_commit=off` for the duration of a hits file import
* At worst, if anything goes down during the import, the transaction
won't be committed. This means no `ImportedHitsFile` record will be
written. Consequently, `import:hits` will pick up the unimported file
on the next job run.