I'd like to be able to run large batch-process jobs for caching, but limit the total resource utilization on them, something like nice(1). Better still would be some way to put a max on total resources & be able to allocate from that.
Does PostgreSQL have facilities for such a thing?
Well, nice(1) does not limit resource allocation, it changes the scheduling priority of a process -- ISTM the two features are largely orthogonal.
Limits on resource allocation (i.e. essentially quotas, getrlimit() and so on) would be cool; some other people have expressed interest in them in the past.
Implementing "batch processes" would be trickier: it seems to me that a naive implementation would fall prey to priority inversion. It should definitely possible to do, though. If you're interested, have at it :-)
-Neil
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