RE: Upgrade check failed from 11.5 to 12.1

Thanks for catching that.  Typo on my end.

Now I am getting this.

Performing Consistency Checks on Old Live Server
------------------------------------------------
Checking cluster versions                                   ok

old and new pg_controldata WAL segment sizes are invalid or do not match
Failure, exiting

I found the setting in the current version of the instance via "show all" as "wal_segment_size                       |
16MB".  I guess my new instance should be "16MB" as well when running this "initdb --wal-segsize=16 -D
/hostname/pg/NewInstance/data"?

-----Original Message-----
From: Tom Lane <tgl@sss.pgh.pa.us>
Sent: Friday, December 18, 2020 4:55 PM
To: Lu, Dan <Dan.Lu@sig.com>
Cc: pgsql-general@postgresql.org
Subject: Re: Upgrade check failed from 11.5 to 12.1

"Lu, Dan" <Dan.Lu@sig.com> writes:
> I am trying to upgrade an instance of PostgreSQL in unix from 11.5 to 12.1.

> UNIX:> pg_upgrade -d /hostname/pg/dpoc/data -D /hostname/pg/dpoc/data
> -b /hostname/pg/PostgreSQL-11.5/bin -B
> /hostname/pg/PostgreSQL-12.1/bin -p 5432 -P 9432 -c -v

No, you can't use the same directory to hold old and new versions at the same time.  After you're done with the
upgrade,you could move the new data directory to be where the old one had been. 

                        regards, tom lane

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