Обсуждение: what do you do after pg_walreset ?
Hello,
Please I wish to find out what you do after running pg_walreset.
I made a mistake and deleted my data directory with all its content. I then restore with 1 day old backups, after that i could start unless i did pg_walreset.
1, I wish to find out what to do after i have started postgresql ?
2, How do I apply the wall files after the reset ?
3, How can I determine the amount of data lost ?
On Thu, 2023-12-21 at 18:53 -0500, Johnathan Tiamoh wrote: > Please I wish to find out what you do after running pg_walreset. You mean pg_resetwal. > I made a mistake and deleted my data directory with all its content. > I then restore with 1 day old backups, after that i could start > unless i did pg_walreset. Which means that the backup was broken. > 1, I wish to find out what to do after i have started postgresql ? pg_dumpall the cluster and restore the result to a new cluster to get rod of the data corruption introduced by pg_resetwal. > 2, How do I apply the wall files after the reset ? You cannot do that. > 3, How can I determine the amount of data lost ? Well, everything from after the "backup". Yours, Laurenz Albe
Hello Laurenz,
Thank you very much for your reply.
On Fri, Dec 22, 2023 at 7:10 AM Laurenz Albe <laurenz.albe@cybertec.at> wrote:
On Thu, 2023-12-21 at 18:53 -0500, Johnathan Tiamoh wrote:
> Please I wish to find out what you do after running pg_walreset.
You mean pg_resetwal.
> I made a mistake and deleted my data directory with all its content.
> I then restore with 1 day old backups, after that i could start
> unless i did pg_walreset.
Which means that the backup was broken.
> 1, I wish to find out what to do after i have started postgresql ?
pg_dumpall the cluster and restore the result to a new cluster
to get rod of the data corruption introduced by pg_resetwal.
> 2, How do I apply the wall files after the reset ?
You cannot do that.
> 3, How can I determine the amount of data lost ?
Well, everything from after the "backup".
Yours,
Laurenz Albe