Horton

Re: Parallel CREATE INDEX vs DSM starvation

Thomas Munro <thomas.munro@gmail.com>

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From: Thomas Munro <thomas.munro@gmail.com>
To: Peter Geoghegan <pg@bowt.ie>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2020-01-30T22:35:53Z
Lists: pgsql-hackers 
On Thu, Jan 30, 2020 at 8:47 PM Peter Geoghegan <pg@bowt.ie> wrote:
> On Wed, Jan 29, 2020 at 11:38 PM Thomas Munro <thomas.munro@gmail.com> wrote:
> > CreateParallelContext() can return a context with seg == NULL.  That
> > causes CREATE INDEX to segfault.  Instead, it should fall back to
> > non-parallel build.  See attached.
>
> I guess we can't call _bt_end_parallel() here. So your patch LGTM.

Thanks.  Pushed.

Commits

  1. Handle lack of DSM slots in parallel btree build.