Thread: could not access file "$libdir/pg_buffercache": No such file or directory

I'm in the process of testing out Postgres 9.0 for production use.  I've been using it for development on my mac, a
buildfrom EnterpriseDB.  We've just installed a 9.0.5 on an Ubuntu (Ubuntu 10.04.3 LTS) machine from a backport from
lucid. There's an existing 8.4.8 postgres install also on that machine, but as far as I'm aware the debs are set up so
youcan happily have two installs side by side. 

I've dumped a test DB from my laptop and attempted to restore it on to the ubuntu machine, but I see errors:

royce@fishy:~$ createdb test
royce@fishy:~$ pg_restore -d test --no-owner test_RTR.pgc
pg_restore: [archiver (db)] Error while PROCESSING TOC:
pg_restore: [archiver (db)] Error from TOC entry 65; 1255 2194102 FUNCTION pg_buffercache_pages() persona
pg_restore: [archiver (db)] could not execute query: ERROR:  could not access file "$libdir/pg_buffercache": No such
fileor directory 
    Command was: CREATE FUNCTION pg_buffercache_pages() RETURNS SETOF record
    LANGUAGE c
    AS '$libdir/pg_buffercache', 'pg_buffercache_...


After looking around a bit, my theory on these errors is that my mac has some contrib module installed that adds views
tomy test database, and those views have been included in the dump.  The contrib module is apparently not installed on
theubuntu machine and hence the restore can't create the views.  Is this theory correct?  If so: 

- Can these errors be safely ignored? (not ideal, because I'll miss other, real errors)
- Is there some simple way I can prevent these views from being emitted as part of the dump?
- Is there some simple way I can prevent these views from being restored from a dump that contains them?
- Otherwise, how can I purge these contrib modules from my laptop?

Otherwise, if my theory is incorrect, any hints as to what it might be?

Cheers!

--Royce

Mac:

                                                              version
            

------------------------------------------------------------------------------------------------------------------------------------
 PostgreSQL 9.0.4 on x86_64-apple-darwin, compiled by GCC i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build
5664),64-bit 
(1 row)


Ubuntu box:

                                                   version
-------------------------------------------------------------------------------------------------------------
 PostgreSQL 9.0.5 on x86_64-pc-linux-gnu, compiled by GCC gcc-4.4.real (Ubuntu 4.4.3-4ubuntu5) 4.4.3, 64-bit
(1 row)

On Fri, Sep 30, 2011 at 04:45, Royce Ausburn <royce.ml@inomial.com> wrote:
> I'm in the process of testing out Postgres 9.0 for production use.  I've been using it for development on my mac, a
buildfrom EnterpriseDB.  We've just installed a 9.0.5 on an Ubuntu (Ubuntu 10.04.3 LTS) machine from a backport from
lucid. There's an existing 8.4.8 postgres install also on that machine, but as far as I'm aware the debs are set up so
youcan happily have two installs side by side. 
>
> I've dumped a test DB from my laptop and attempted to restore it on to the ubuntu machine, but I see errors:
>
> royce@fishy:~$ createdb test
> royce@fishy:~$ pg_restore -d test --no-owner test_RTR.pgc
> pg_restore: [archiver (db)] Error while PROCESSING TOC:
> pg_restore: [archiver (db)] Error from TOC entry 65; 1255 2194102 FUNCTION pg_buffercache_pages() persona
> pg_restore: [archiver (db)] could not execute query: ERROR:  could not access file "$libdir/pg_buffercache": No such
fileor directory 
>    Command was: CREATE FUNCTION pg_buffercache_pages() RETURNS SETOF record
>    LANGUAGE c
>    AS '$libdir/pg_buffercache', 'pg_buffercache_...
>
>
> After looking around a bit, my theory on these errors is that my mac has some contrib module installed that adds
viewsto my test database, and those views have been included in the dump.  The contrib module is apparently not
installedon the ubuntu machine and hence the restore can't create the views.  Is this theory correct?  If so: 
>
> - Can these errors be safely ignored? (not ideal, because I'll miss other, real errors)

Yes.

> - Is there some simple way I can prevent these views from being emitted as part of the dump?

Not easily, not in 9.0. Once you upgrade to 9.1 and upgrade them to
extensions, the problem should be much easier..

> - Is there some simple way I can prevent these views from being restored from a dump that contains them?

Not really.

> - Otherwise, how can I purge these contrib modules from my laptop?

There is an uninstall script for them. it should be next to where your
install script is (usually in share/contrib, but I'm not sure where
the edb installer puts it on the mac). It's called
uninstall_pg_cuffercache.sql. Run that in the old database and it
should drop all the required objects.

> Otherwise, if my theory is incorrect, any hints as to what it might be?

You can also install the -contrib DEB package on your Ubuntu box, and
then you will have the required libraries, and it will recreate the
functions and views correctly.

--
 Magnus Hagander
 Me: http://www.hagander.net/
 Work: http://www.redpill-linpro.com/

Royce Ausburn wrote:
> I'm in the process of testing out Postgres 9.0 for production use.
I've been using it for development
> on my mac, a build from EnterpriseDB.  We've just installed a 9.0.5 on
an Ubuntu (Ubuntu 10.04.3 LTS)
> machine from a backport from lucid.  There's an existing 8.4.8
postgres install also on that machine,
> but as far as I'm aware the debs are set up so you can happily have
two installs side by side.
>
> I've dumped a test DB from my laptop and attempted to restore it on to
the ubuntu machine, but I see
> errors:
>
> royce@fishy:~$ createdb test
> royce@fishy:~$ pg_restore -d test --no-owner test_RTR.pgc
> pg_restore: [archiver (db)] Error while PROCESSING TOC:
> pg_restore: [archiver (db)] Error from TOC entry 65; 1255 2194102
FUNCTION pg_buffercache_pages()
> persona
> pg_restore: [archiver (db)] could not execute query: ERROR:  could not
access file
> "$libdir/pg_buffercache": No such file or directory
>     Command was: CREATE FUNCTION pg_buffercache_pages() RETURNS SETOF
record
>     LANGUAGE c
>     AS '$libdir/pg_buffercache', 'pg_buffercache_...
>
>
> After looking around a bit, my theory on these errors is that my mac
has some contrib module installed
> that adds views to my test database, and those views have been
included in the dump.  The contrib
> module is apparently not installed on the ubuntu machine and hence the
restore can't create the views.
> Is this theory correct?  If so:
>
> - Can these errors be safely ignored? (not ideal, because I'll miss
other, real errors)
> - Is there some simple way I can prevent these views from being
emitted as part of the dump?
> - Is there some simple way I can prevent these views from being
restored from a dump that contains
> them?
> - Otherwise, how can I purge these contrib modules from my laptop?
>
> Otherwise, if my theory is incorrect, any hints as to what it might
be?

Your theory sounds correct since there is a contrib "pg_buffercache" and
the
error message indicates that the shared object cannot be found.

The best solution would be to drop
  FUNCTION pg_buffercache_pages()
and
  VIEW pg_buffercache
in the original database before dumping.

That way you can be sure that nothing else in the database depends on
these objects.

You can always reinstall the contrib if you need it.

Yours,
Laurenz Albe