Re: [COMMITTERS] pgsql: Create a "relation mapping" infrastructure to support changing

I just noticed that this patch

> Create a "relation mapping" infrastructure to support changing the relfilenodes
> of shared or nailed system catalogs.  This has two key benefits:

creates a new function pg_relation_filenode() that only uses the
syscache to fetch the relation's filenode, without locking it.  I wonder
if we could do the same in the pg_relation_size() function and friends,
to avoid having to grab a lock on the relation.

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.