Re: Support Parallel Query Execution in Executor

Alvaro Herrera <alvherre(at)commandprompt(dot)com> writes:

> An idea arising in chat with Joshua Drake: the retargetting code, if it
> turns out to work and not be excessively expensive, could also be useful
> to implement a server-side "connection pooling" of sorts: the postmaster
> could keep idle backends and retarget them to a database that receives
> an incoming connection. However, we'd also need a mechanism to clean
> all backend state previous to reusing a connection, to leave it "as
> new" (no prepared statements, WITH HOLD cursors, etc.)

Isn't all that work pretty much exactly the main cost of starting a new
backend?

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greg