Re: [PERFORM] pg_dump and thousands of schemas

On Thu, May 31, 2012 at 09:20:43AM +0900, Tatsuo Ishii wrote:
> >> Yeah, Jeff's experiments indicated that the remaining bottleneck is lock
> >> management in the server.  What I fixed so far on the pg_dump side
> >> should be enough to let partial dumps run at reasonable speed even if
> >> the whole database contains many tables.  But if psql is taking
> >> AccessShareLock on lots of tables, there's still a problem.
> >
> > Ok, I modified the part of pg_dump where tremendous number of LOCK
> > TABLE are issued. I replace them with single LOCK TABLE with multiple
> > tables. With 100k tables LOCK statements took 13 minutes in total, now
> > it only takes 3 seconds. Comments?
>
> Shall I commit to master and all supported branches?

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  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

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