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Re: Press Release review comments

From: Greg Smith <gsmith(at)gregsmith(dot)com>
To: pgsql-advocacy(at)postgresql(dot)org
Subject: Re: Press Release review comments
Date: 2007-12-14 22:52:57
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Lists: pgsql-advocacy
On Fri, 14 Dec 2007, Simon Riggs wrote:

> I measured ~900% performance gain on a pure INSERT workload. Any 
> transaction whose major component is the commit time will benefit from 
> increased performance, i.e. short transactions get even faster.

I saw something in the multi-hundred percent range as well for some simple 
benchmarks.  The huge win is cases where right now the limiter is the rate 
of commits to disk, and in other situations I wouldn't be surprised to 
find little or no improvement.

I'm not sure how to make that distinction clear to regular users though. 
I've been thinking about it since your first message in this thread, and 
so far I'm at a loss as to how to fairly and accurately characterize the 
improvement in a way that's short enough to put into the press release. 
It's hard to say any variant on "you can trade-off reliability for speed" 
without sounding like you don't care about reliability; you need the 
context that some competitors have been doing that already without making 
it so obvious to appreciate the feature.

> Many web apps fall into this category, especially those currently 
> running on MySQL, Solid etc.

When I was working on the big MySQL comparison piece over the summer, the 
only upcoming 8.3 feature I mentioned by name was async commit because it 
will shift the landscape more than anything else.  You certainly have my 
vote that it's more noteworthy than the background writer changes, but 
writing a description blurb saying that may take some work.  Maybe you 
should hire the PR people those guys who worked on the BGW change used, 
they managed to get a small tuning feature listed right up there in the 
big press release.

* Greg Smith gsmith(at)gregsmith(dot)com Baltimore, MD

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