About postgres pg_upgrade
Hi Team,
Could you please explain me how does pg_upgrade works one of my friends it
works based on pg_restore I am bit confused
On 5 Apr 2024, at 06:47, Rama Krishnan <raghuldrag@gmail.com> wrote:
Could you please explain me how does pg_upgrade works one of my friends it works based on pg_restore I am bit confused
The documentation does a fairly good job explaining how it works, and there are
multiple blogposts and presentations on the subject to be found.
https://www.postgresql.org/docs/devel/pgupgrade.html
To summarize in a few words, pg_upgrade does a dump/restore of the schema from
the old cluster into the new, but copies the table data. Your friend is thus
isn't wrong, it does use pg_restore but only for the schema, not the data.
--
Daniel Gustafsson
On Fri, Apr 5, 2024 at 09:41:05AM +0200, Daniel Gustafsson wrote:
On 5 Apr 2024, at 06:47, Rama Krishnan <raghuldrag@gmail.com> wrote:
Could you please explain me how does pg_upgrade works one of my friends it works based on pg_restore I am bit confused
The documentation does a fairly good job explaining how it works, and there are
multiple blogposts and presentations on the subject to be found.https://www.postgresql.org/docs/devel/pgupgrade.html
To summarize in a few words, pg_upgrade does a dump/restore of the schema from
the old cluster into the new, but copies the table data. Your friend is thus
isn't wrong, it does use pg_restore but only for the schema, not the data.
This presentation shows how it works internally:
https://momjian.us/main/writings/pgsql/pg_upgrade.pdf
--
Bruce Momjian <bruce@momjian.us> https://momjian.us
EDB https://enterprisedb.com
Only you can decide what is important to you.