Re: 9.3 feature proposal: vacuumdb -j #

On Friday, January 13, 2012 10:50:32 PM Josh Berkus wrote:
> Hackers,
>
> It occurs to me that I would find it quite personally useful if the
> vacuumdb utility was multiprocess capable.
>
> For example, just today I needed to manually analyze a database with
> over 500 tables, on a server with 24 cores. And I needed to know when
> the analyze was done, because it was part of a downtime. I had to
> resort to a python script.
>
> I'm picturing doing this in the simplest way possible: get the list of
> tables and indexes, divide them by the number of processes, and give
> each child process its own list.
That doesn't sound like a good idea. Its way too likely that you will end up
with one backend doing all the work because it got some big tables.

I don't think this task deserves using threads or subprocesses. Multiple
connections from one process seems way more sensible and mostly avoids the
above problem.

Andres