On 6/14/13 1:06 PM, Jeff Davis wrote:
Why have a GUC here at all? Perhaps this was already discussed, and I
missed it? Is it just for testing purposes, or did you intend for it to
be in the final version?

You have guessed correctly! I suggested it stay in there only to make review benchmarking easier.

I started looking at this patch and it looks like we are getting a
consensus that it's the right approach. Microbenchmarks appear to show a
benefit, and (thanks to Noah's comment) it seems like the change is
safe. Are there any remaining questions or objections?

I'm planning to duplicate Jon's test program on a few machines here, and then see if that turns into a useful latency improvement for clients. I'm trying to get this pgbench rate limit stuff working first though, because one of the tests I had in mind for WAL creation overhead would benefit from it.

Greg Smith   2ndQuadrant US    g...@2ndquadrant.com   Baltimore, MD
PostgreSQL Training, Services, and 24x7 Support www.2ndQuadrant.com

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