Re: PATCH: Split stats file per database WAS: autovacuum stress-testing our system

Here's an updated version of this patch that takes care of the issues I
reported previously: no more repalloc() of the requests array; it's now
an slist, which makes the code much more natural IMV. And no more
messing around with doing sprintf to create a separate sprintf pattern
for the per-db stats file; instead have a function to return the name
that uses just the pgstat dir as stored by GUC. I think this can be
further simplified still.

I haven't reviewed the rest yet; please do give this a try to confirm
that the speedups previously reported are still there (i.e. I didn't
completely blew it).

Thanks

--
Álvaro Herrera http://www.2ndQuadrant.com/
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