[postgis-devel] Parallel MVT

Paul Ramsey pramsey at cleverelephant.ca
Fri Nov 3 07:45:35 PDT 2017


Want it?
I did it up because in theory we're going to want it at Carto to drive
vector tile generation, but in practice so far it seems damnable hard to
force into action, the planner only wants to parallelize queries with large
numbers of tuples in place, and even then first with a parallel scan before
getting to the parallel aggregate. At least. for my aggregate. I can,
annoyingly, get a parallel aggregate on Sum() on a 60K record table.
Anyways, the upside is: it's parallel!
The downside is: it makes things more complex!
It's sitting in a branch if there's interest in it for 2.5
P
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