| From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
|---|---|
| To: | Chris Redekop <chris(at)replicon(dot)com> |
| Cc: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Hot Backup with rsync fails at pg_clog if under load |
| Date: | 2011-10-23 23:27:40 |
| Message-ID: | CA+U5nMLvMp8ikF+9HYaJEtqUQyJkP5WHBEqZqbBswn6KDwCx1Q@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sun, Oct 16, 2011 at 2:33 AM, Chris Redekop <chris(at)replicon(dot)com> wrote:
> pg_subtrans: http://pastebin.com/qAXEHAQt
I confirm this as a HS issue and will investigate from here.
FATAL: could not access status of transaction 21110784
which, in pg_subtrans, is the first xid on a new subtrans page. So we
have missed zeroing a page.
pg_control shows ... Latest checkpoint's oldestActiveXID: 21116666
which shows quite clearly that the pg_control file is later than it should be.
Chris, can you rearrange the backup so you copy the pg_control file as
the first act after the pg_start_backup?
--
Simon Riggs http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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