Alvaro Herrera wrote:
> Bruce Momjian wrote:
> > Alvaro Herrera wrote:
> > > Bruce Momjian wrote:
> > > > Jamie Fox wrote:
> > >
> > > > > I can also see that the pg_largeobject table is different, in the pg_restore
> > > > > version the Rows (estimated) is 316286 and Rows (counted) is the same, in
> > > > > the pg_migrator version the Rows (counted) is only 180507.
> > >
> > > > Wow, I didn't test large objects specifically, and I am confused why
> > > > there would be a count discrepancy. I will need to do some research
> > > > unless someone else can guess about the cause.
> > >
> > > Maybe pg_largeobject is not getting frozen?
> > That would explain the change in count, but I thought we froze
> > _everything_, and had to.
> After a quick chat with Bruce it was determined that we don't freeze
> anything (it would be horrid for downtime if we did so in pg_migrator;
> and it would be useless if ran anywhere else). What we do is migrate
> pg_clog from the old cluster to the new. So never mind that hypothesis.
> Bruce noticed that the pg_dump/pg_migrator combo is failing to restore
> pg_largeobject's relfrozenxid. We're not sure how this is causing the
> errors Jamie is seeing, because what I think should happen is that scans
> of the table should fail with failures to open pg_clog files
> such-and-such, but not missing tuples ...
Jamie, is it possible for you to apply the attached patch to the 8.4
server, install the new pg_dump, and run the test again to see if
pg_largeobject is fixed? This patch properly sets the relfrozenxid in
the system tables for each database.
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
+ If your life is a hard drive, Christ can be your backup. +
In response to
pgsql-hackers by date
|Next:||From: Robert Haas||Date: 2009-07-14 03:08:42|
|Subject: Re: [PATCH] SE-PgSQL/lite rev.2163|
|Previous:||From: Tom Lane||Date: 2009-07-14 02:42:53|
|Subject: Re: Upgrading our minimum required flex version for 8.5 |
pgsql-general by date
|Next:||From: Scott Mead||Date: 2009-07-14 03:48:27|
|Subject: Re: Start With... Connect By?|
|Previous:||From: Bruce Momjian||Date: 2009-07-14 02:37:02|
|Subject: Re: [GENERAL] pg_migrator not setting values of