Re: Postgres 12 -> 13 any need to re-index?

This command is well documented:

vacuumdb --analyze-only --jobs=$(nproc) -d ${YOUR_DB}

On 2/9/21 12:49 PM, Wells Oliver wrote:
> OK, that seems to have made a huge difference. and ran very quickly, ~15
> mins on a ~1TB database. Is there a way to better understand what it did?
> There's no way it rebuilt indexes in that amount of time. Also, as I said,
> I never did that going from 9->10->11->12, so it's interesting to me that
> it was so critical this time around.
>
>
>
> On Tue, Feb 9, 2021 at 10:27 AM Wells Oliver <wells(dot)oliver(at)gmail(dot)com
> <mailto:wells(dot)oliver(at)gmail(dot)com>> wrote:
>
> Yeah. Running that now. Honestly, I went from 9 to 10 to 11 to 12
> without doing that in prod, and it was marvelous. 13 hit a wall, and
> I'm not sure why.
>
> It's running now, though...
>
> On Tue, Feb 9, 2021 at 10:25 AM Ron <ronljohnsonjr(at)gmail(dot)com
> <mailto:ronljohnsonjr(at)gmail(dot)com>> wrote:
>
> On 2/9/21 12:18 PM, Wells Oliver wrote:
>> No, I didn't. I had done that in testing
>
> Tsk tsk.
>
>> and wanted to get the thing back up and running. Would i just run
>> 'analyze dbname' or something more verbose?
>
> Essentially.  I'd do something like:
>
> vacuumdb --analyze-only --jobs=$(nproc) -d ${YOUR_DB}
>
>>
>> On Tue, Feb 9, 2021 at 10:17 AM Ron <ronljohnsonjr(at)gmail(dot)com
>> <mailto:ronljohnsonjr(at)gmail(dot)com>> wrote:
>>
>> On 2/9/21 12:13 PM, Wells Oliver wrote:
>>> Do you mean Ubuntu distro? I did not. My database collation
>>> is also still en_US.UTF-8, but everything has ground to a
>>> halt after the upgrade.
>>
>> Did you run an ANALYZE after the conversion?
>>
>>>
>>> On Tue, Feb 9, 2021 at 10:07 AM Ron <ronljohnsonjr(at)gmail(dot)com
>>> <mailto:ronljohnsonjr(at)gmail(dot)com>> wrote:
>>>
>>> On 2/9/21 12:00 PM, Wells Oliver wrote:
>>> > Hey guys, I just upgraded a DB from 12 to 13. In
>>> testing this seemed to go
>>> > well, but it seems like most of my queries are not
>>> using the indexes after
>>> > the upgrade, so everything is quite so.
>>> >
>>> > Is there a general need to REINDEX after upgrading to
>>> 13, or might there
>>> > be another issue? The configuration parameters are the
>>> same as they were
>>> > persisted via pg_upgradecluster.
>>>
>>> Did you also change or upgrade the distro, or modify the
>>> collation? (That's
>>> an automatic need to rebuild indices.)
>>>
>>
>
> --
> Angular momentum makes the world go 'round.
>
>
>
> --
> Wells Oliver
> wells(dot)oliver(at)gmail(dot)com <mailto:wellsoliver(at)gmail(dot)com>
>
>
>
> --
> Wells Oliver
> wells(dot)oliver(at)gmail(dot)com <mailto:wellsoliver(at)gmail(dot)com>

--
Angular momentum makes the world go 'round.