pg_upgrade: out of memory

On Mon, Feb 06, 2012 at 05:14:55PM -0500, deepak wrote:

Hi!

While running pg_upgrade, on one instance, it ran out of memory during the
final stages of upgrade
(just before it starts to "link" old database files to new ones).

We are using Postgres 9.1.1, and I see that there were some fixes to pg_upgrade
in 9.1.2, though
it doesn't mention anything about memory issues as such.

Wondering if anyone has run into a similar type of situation, and if so, how to
solve it?

Also, is it possible to recover the database once pg_upgrade aborts in this
manner?

Here's an excerpt from the log while running pg_upgrade:
...
"bin/pg_ctl" -w -D "data" stop
waiting for server to shut down....LOG: received smart shutdown request
LOG: shutting down
.......LOG: database system is shut down
. done
server stopped
Restoring user relation files
Restoring user relation files
pg_upgrade: out of memory

pg_upgrade: out of memory

Wow, that's pretty amazing. As the docs say, pg_upgrade doesn't modify
the old cluster so you should be fine in reverting to that.

As far as why it ran out of memory, I have no idea, and have never heard
of a report about that before. Can you run it in a debugger and get a
backtrace?

--
Bruce Momjian <bruce@momjian.us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ It's impossible for everything to be true. +