Re: Restore of a reference database kills the auto analyze processing.

On 5/15/24 01:08, HORDER Philip wrote:
> Classified as: {OPEN}
>
> Backups of this db are created with:
>
> pg_dump --file=fsm.dmp -Fc --blobs --oids --dbname=lfm --host=localhost --port=nnnn --username=superuser

From your original post:

"Running Postgres 15.3 ..."

--oids have not been supported with pg_dump since v11

When I try it:

pg_dump -V
pg_dump (PostgreSQL) 15.7 (Ubuntu 15.7-1.pgdg22.04+1)

pg_dump -d test -U postgres --oids -f test.sql
/usr/lib/postgresql/15/bin/pg_dump: unrecognized option '--oids'

So what version of pg_dump are you using?

Or you not working on a v15 instance of Postgres?

FYI, --blobs is only needed when dumping a specific table or schema,
otherwise it happens by default.

>
> Restore is run with:
>
> dropdb --port=nnnn --maintenance-db=postgres --username=superuser --if-exists lfm
> pg_restore -Fc --create --dbname=postgres --port=nnnn --username=superuser
> fsm.dmp
>
> -------------
>
>> 2) From earlier post: '... only analyzes tables in the new db at the point of reload, then shuts off again.' Provide that sequence of events from the Postgres log.
>
> Log file extract is attached, with object names obfuscated.

Still working my way through that.

>
> From yesterday, current stats for table a.accp, from pg_STAT_all_tables:
> "811486381""airscape""accp"16458538988177871456553503047055581967135016364880294000"2024-05-14 14:51:37.158892+00""2024-05-09 08:27:45.328468+00""2024-05-14 13:15:31.999198+00"01815170101653

I can't parse this out well enough to really say anything. Though the
timestamps seem to indicate recent activity.

Using psql do

\x
select * from pg_stat_all_tables where relname = 'a.accp';

to get an extended output that is easier to read.

>
> This table has a low row count, but high content turnover.
> It usually gets auto-analyzed every minute.
>
> For today, this hasn't been auto analysed since the update at 3am.
>
>
>> 4) The autovacuum settings you have in effect:
>
> vacuum_cost_limit = 2000
> log_autovacuum_min_duration = 0
> autovacuum_max_workers = 10
>
> all other vacuum settings are defaults.
>
> ------------
>
> Phil Horder
> Database Mechanic
>
> Thales
> Land & Air Systems
>
>
> {OPEN}
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--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com