>
> > Using one thread, the app can do about 111 rows per second, and it's
> > only exercising 1.5 of 8 CPU cores while doing this. 12,000,000 rows /
> > 111 rows per second ~= 30 hours.
>
> I don't know how I missed that. You ARE maxing out one cpu core, so
> you're quite right that you need more threads unless you can make your
> single worker more efficient.
>
And the problem is my app already has between 20 and 30 threads. Something
about C#'s PLINQ may not be working as intended...
Aren