I believe the correct way is the following.
1. get the oid from pg_class for relname='pg_toast_100194'
2. lookup up the relname from pg_class where reltoastrelid = the oid from the first query.
so on my system
select oid from pg_class where relname='pg_toast_17070';
oid
-------
17072
(1 row)
select relname from pg_class where reltoastrelid=17072;
relname
--------------
sql_features
(1 row)
---------- Original Message -----------
From: Akash Garg <akash.garg@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-general@postgresql.org
Sent: Mon, 18 Jul 2005 10:35:40 -0700
Subject: Re: [GENERAL] Error while vacuuming
> Sounds good -- I will try that. Will this REINDEX lock any queries
> that are currently running on the database? And is there anway to
> find out what table this toast table is related to?
>
> Thanks,
> Akash
>
> On 7/18/05, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> > Akash Garg <akash.garg@gmail.com> writes:
> > > I get this error when I run a VACUUM:
> > > INFO: vacuuming "pg_toast.pg_toast_100194"
> > > vacuumdb: vacuuming of database "friend" failed: ERROR: could not
> > > open segment 1 of relation "pg_toast_100194_index" (target block
> > > 1226167840): No such file or directory
> >
> > > I'm assuming I can just delete and recreate the index in question,
> > > although I'm not sure which index or table it's talking about. Any
> > > ideas?
> >
> > This probably means a corrupt next-page link in some page of the index.
> > I'd suggest
> > REINDEX TABLE pg_toast.pg_toast_100194;
> >
> > You might want to do the usual song and dance about memory and disk
> > hardware checks, too.
> >
> > regards, tom lane
> >
>
> ---------------------------(end of broadcast)---------------------------
> TIP 2: Don't 'kill -9' the postmaster
------- End of Original Message -------
