Horton

Re: pg_prewarm

Jeff Janes <jeff.janes@gmail.com>

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From: Jeff Janes <jeff.janes@gmail.com>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Fujii Masao <masao.fujii@gmail.com>, pgsql-hackers@postgresql.org
Date: 2012-03-09T15:53:22Z
Lists: pgsql-hackers

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  1. pgstattuple: Use a BufferAccessStrategy object to avoid cache-trashing.

On Fri, Mar 9, 2012 at 5:21 AM, Robert Haas <robertmhaas@gmail.com> wrote:
> On Fri, Mar 9, 2012 at 5:24 AM, Fujii Masao <masao.fujii@gmail.com> wrote:
>> When a relation is loaded into cache, are corresponding indexes also loaded
>> at the same time?
>
> No, although if you wanted to do that you could easily do so, using a
> query like this:
>
> select pg_prewarm(indexrelid, 'main', 'read', NULL, NULL) from
> pg_index where indrelid = 'your_table_name'::regclass;

Could that be included in an example?  Maybe admins are expected to
know how to construct such queries of the cuff, but I always need to
look it up each time which is rather tedious.

In the patch:

s/no special projection/no special protection/

Thanks for putting this together.

Cheers,

Jeff