| From: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
|---|---|
| To: | Justin Pryzby <pryzby(at)telsasoft(dot)com> |
| Cc: | Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: parallel vacuum - few questions on docs, comments and code |
| Date: | 2021-05-12 04:17:58 |
| Message-ID: | CAA4eK1KXCdL+3fkHqnaK++s4Kkgr+2gVZ3k5v1FHmJNpGX6h-Q@mail.gmail.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Tue, May 11, 2021 at 6:31 PM Justin Pryzby <pryzby(at)telsasoft(dot)com> wrote:
>
> On Tue, May 11, 2021 at 05:37:50PM +0530, Bharath Rupireddy wrote:
> > 3) Should the Assert(nindexes > 0); in begin_parallel_vacuum just be
> > Assert(nindexes > 1); as this function is entered only when indexes
> > are > 1?
>
> I think you're right, at least with the current implementation that
> parallelization is done across indexes. Same in parallel_vacuum_main.
>
Yeah, as code stands both of you are right. However, it can be helpful
to test parallelism even with one index say if we implement something
like force_parallel_mode = regress or parallel_leader_participation =
off.
--
With Regards,
Amit Kapila.
| From | Date | Subject | |
|---|---|---|---|
| Next Message | vignesh C | 2021-05-12 04:19:34 | Re: Replication slot stats misgivings |
| Previous Message | Pavel Stehule | 2021-05-12 04:17:03 | Re: Schema variables - new implementation for Postgres 15 |