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Re: Load Distributed Checkpoints, final patch

From: Greg Smith <gsmith(at)gregsmith(dot)com>
To: Patches <pgsql-patches(at)postgresql(dot)org>
Subject: Re: Load Distributed Checkpoints, final patch
Date: 2007-06-26 22:25:12
Message-ID: Pine.GSO.4.64.0706261806590.10548@westnet.com (view raw or flat)
Thread:
Lists: pgsql-patches
On Tue, 26 Jun 2007, Heikki Linnakangas wrote:

> I'm scheduling more DBT-2 tests at a high # of warehouses per Greg Smith's 
> suggestion just to see what happens, but I doubt that will change my mind on 
> the above decisions.

I don't either, at worst I'd expect a small documentation update perhaps 
with some warnings based on what's discovered there.  The form you've 
added checkpoint_completion_target in is sufficient to address all the 
serious concerns I had; I can turn it off, I can smooth just a bit without 
increasing recovery time too much, or I can go all out smooth.

Certainly no one should consider waiting for the tests I asked you about a 
hurdle to getting this patch committed, slowing that down was never my 
intention by bringing that up.  I'm just curious to see if anything 
scurries out of some the darker corners in this area when they're 
illuminated.  I'd actually like to see this get committed relatively soon 
because there's two interleaved merges stuck behind this one (the more 
verbose logging patch and the LRU modifications).

--
* Greg Smith gsmith(at)gregsmith(dot)com http://www.gregsmith.com Baltimore, MD

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Subject: Re: Load Distributed Checkpoints, take 3
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