| From: | hubert depesz lubaczewski <depesz(at)depesz(dot)com> |
|---|---|
| To: | Michael Lewis <mlewis(at)entrata(dot)com> |
| Cc: | Paul van der Linden <paul(dot)doskabouter(at)gmail(dot)com>, pgsql-general <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Slow index creation |
| Date: | 2021-02-18 17:49:48 |
| Message-ID: | 20210218174948.GA17102@depesz.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-general |
On Thu, Feb 18, 2021 at 10:24:25AM -0700, Michael Lewis wrote:
> [1]https://www.depesz.com/2010/03/18/profiling-stored-proceduresfunctions/
>
> Thanks for this reference. I enjoy your blog, but haven't made the time to read all the archives somehow. Stuff doesn't stick very
> well when it isn't yet "needed" info besides.
> I have seen overhead from 'raise notice' in small functions that are sometimes called many thousands of times in a single query, but
> hadn't done the test to verify if the same overhead still exists for raise debug or another level below both client_min_messages
> and log_min_messages. Using your examples, I saw about .006 ms for each call to RAISE DEBUG with a client/log_min as notice/warning.
Sure, this overhead is definitely possible, but kinda besides the point
- there will be some slowdowns in other places, and it will be good to
track them.
That's why I suggested to do it on small sample of data.
Best regards,
depesz
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Magnus Hagander | 2021-02-18 18:11:37 | Re: How to post to this mailing list from a web based interface |
| Previous Message | Michael Lewis | 2021-02-18 17:24:25 | Re: Slow index creation |