On Jun 14, 2012, at 11:37 AM, Peter Cock wrote:

> My hunch is that all the child-jobs are created and added to the
> queue and some of this is happening in parallel leading to
> contention over the SQLite database. Does this sound likely?

Yep, this is exactly what's happening.  It isn't just the job splitting code 
either, this happens in other circumstances as well.

> Is this something that could be more robust in Galaxy, or should
> I simply switch to a real database (SQLite or PostreSQL) for these
> tests?

I've never taken a serious look at what it'd take to prevent this happening, 
but I use (and recommend) Postgres for any of hte parallelism work.

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