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Re: pg_dump additional options for performance

From: daveg <daveg(at)sonic(dot)net>
To: Simon Riggs <simon(at)2ndquadrant(dot)com>, pgsql-patches(at)postgresql(dot)org
Subject: Re: pg_dump additional options for performance
Date: 2008-07-21 01:49:42
Message-ID: 20080721014942.GC30869@sonic.net (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-patches
On Sun, Jul 20, 2008 at 09:18:29PM -0400, Stephen Frost wrote:
> * Simon Riggs (simon(at)2ndquadrant(dot)com) wrote:
> > On Sun, 2008-07-20 at 17:43 -0400, Stephen Frost wrote:
> > > Even this doesn't cover everything though- it's too focused on tables
> > > and data loading.  Where do functions go?  What about types?
> > 
> > Yes, it is focused on tables and data loading. What about
> > functions/types? No relevance here.
> 
> I don't see how they're not relevant, it's not like they're being
> excluded and in fact they show up in the pre-load output.  Heck, even if
> they *were* excluded, that should be made clear in the documentation
> (either be an explicit include list, or saying they're excluded).
> 
> Part of what's driving this is making sure we have a plan for future
> objects and where they'll go.  Perhaps it would be enough to just say
> "pre-load is everything in the schema, except things which are faster
> done in bulk (eg: indexes, keys)".  I don't think it's right to say
> pre-load is "only object definitions required to load data" when it
> includes functions and ACLs though.
> 
> Hopefully my suggestion and these comments will get us to a happy
> middle-ground.

One observation, indexes should be built right after the table data
is loaded for each table, this way, the index build gets a hot cache
for the table data instead of having to re-read it later as we do now.

-dg
 


-- 
David Gould       daveg(at)sonic(dot)net      510 536 1443    510 282 0869
If simplicity worked, the world would be overrun with insects.

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