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

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

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.

> 3) Also statistics from
https://www.postgresql.org/docs/current/monitoring-stats.html#MONITORING-PG-STAT-ALL-TABLES-VIEW
for that table after the reload.

Well, 'that' table is everything, I'll add an entry for a table that obviously needs stats collection.

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

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}
The information contained in this e-mail is confidential. It is intended only for the stated addressee(s) and access to it by any other person is unauthorised. If you are not an addressee, you must not disclose, copy, circulate or in any other way use or rely on the information contained in this e-mail. Such unauthorised use may be unlawful. If you have received this e-mail in error, please inform the originator immediately and delete it and all copies from your system.

Thales UK Limited. A company registered in England and Wales. Registered Office: 350 Longwater Avenue, Green Park, Reading, Berks RG2 6GF. Registered Number: 868273

Please consider the environment before printing a hard copy of this e-mail.