Is there a recommended maximum number of jobs QMaster can handle?

In our setup we need to render some 4,000 - 8,000 short video segments (only a few seconds each). Right now we are submitting them all one after the other via the command line to a cluster (QAdministrator has been set to allow 10,000 batches in the queue).
Has anyone experienced problems with queues this large? When rendering, QMaster randomly dies - mostly at around 1,000 batches. The batches remain in the spool but I need to reinstall the QMaster Service Node package to get everything off and running again.
I don't like the idea of having to babysit the queue and I submitting the next one after the previous one negates the whole idea of using clusters.
I've thought about adding more equipment to clear out the queue faster, but I don;t want to recommend this route if it doesn't work as that would be a huge expense wasted.
It's almost as if QMaster has a memory leak but that's just a guess.
Any thoughts or wisdom would be welcome.

I would imagine most people submitting such a large number of jobs are using something more robust like Qube:
http://www.pipelinefx.com/products/qube-film.php
Qmaster is very buggy and would need a complete rewrite before it could be qualified for use in such an environment.

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