Re: pg_restore Question - Mailing list pgsql-admin

From Edwin UY
Subject Re: pg_restore Question
Date
Msg-id CA+wokJ_11i8tp-oDMkt_FRcx8xJV7ZOy2QWW80-fWk_bdGHQgw@mail.gmail.com
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In response to Re: pg_restore Question  (Ron Johnson <ronljohnsonjr@gmail.com>)
Responses Re: pg_restore Question
List pgsql-admin
Yes, Samurai Jack, I mean Ron --- just kidding. That is my preference too. 
When you work with several people who are 'Senior' DBA, it's difficult to go to a debate / argument of sort that we should be doing it like this :( Will continue to check things around.
Kinda hoping there are some kind of timestamps when a table / index gets created. 

P.S.:
I really wish I can properly learn PostgreSQL hands-on in the real world as a remote intern somewhere.

On Sun, Jun 22, 2025 at 9:58 PM Ron Johnson <ronljohnsonjr@gmail.com> wrote:
This is why I do all backups, restores, upgrades, etc through cron.

On Sat, Jun 21, 2025 at 8:59 AM Furkan Shaikh <fs626261@gmail.com> wrote:
  • No Definitive Proof: Without logs, you cannot get a timestamped log entry saying "pg_restore started/finished." All these methods provide indirect evidence.

  • Requires Prior Knowledge: Most effective indicators rely on you having some memory or previous records of the database's state (e.g., typical sequence values, expected bloat, average last-vacuum times).

  • Other Causes: Some of these patterns (like recent statistics) could also be caused by an aggressive VACUUM FULL, a major data import through other means, or an application bug that resets sequences.

Conclusion

The most reliable indicators without direct logs are a sudden and uniform resetting of last_vacuum/last_analyze timestamps to NULL or very recent values across all user tables, combined with a potential change in object OIDs (if you tracked them) or unexpected sequence values. If you see most of your tables


On Sat, 21 Jun, 2025, 3:41 pm Edwin UY, <edwin.uy@gmail.com> wrote:
Hi,

Without access to the dumpfile or log file, is there any way to check whether a database has been restore either by pg_restore or other means?

Regards,
Edd




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