| From: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: [COMMITTERS] pgsql: Create a "relation mapping" infrastructure to support changing |
| Date: | 2010-02-08 13:47:02 |
| Message-ID: | 20100208134702.GB4113@alvh.no-ip.org |
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| Lists: | pgsql-committers pgsql-hackers |
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.
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