Thanks!
I was misled by "pg_controldata" keyword and totally ignored the WAL segment size variable.
Much appreciated for your help.
-----Original Message-----
From: Julien Rouhaud [mailto:rjuju123@gmail.com]
Sent: Wednesday, December 25, 2019 10:36 AM
To: Lu, Dan <Dan.Lu@sig.com>
Cc: pgsql-general@postgresql.org
Subject: Re: Question on upgrading postgresql from 10.7 to 11.5
On Wed, Dec 25, 2019 at 3:42 PM Lu, Dan <Dan.Lu@sig.com> wrote:
>
> Hello,
>
> I am trying to upgrade my PG instance from 10.7 to 11.5.
>
> I got an error in doing so. Any idea what I am missing?
>
> Example: pg_upgrade -d /hostname/pg/dpoc/data -D
> /hostname/pg/dpoc115/data -b /hostname/pg/PostgreSQL-10.7/bin -B
> /hostname/pg/PostgreSQL-11.5/bin -p 5432 -P 9432 -c -v
>
> Error message:
>
> old and new pg_controldata WAL segment sizes are invalid or do not
> match
The message is pretty much self explanatory. It looks like you used "initdb --wal-segsize" for the 11.5 cluster using
avalue different from the one that were used in your 10.7 cluster (probably 16MB). You can check the value for each
using"SHOW wal_segment_size". You have to recreate a new pg11 data directory using the same value as the 10.7 one.
Whileat it, you should update the pg11 binary to the latest minor version, 11.6.
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