Re: checkpointer continuous flushing

> synchronous_commit = off does make a significant difference.

Sure, but I had thought about that and kept this one...

I think I found one possible culprit: I automatically wrote 300 seconds 
for checkpoint_timeout, instead of 30 seconds in your settings. I'll have 
to rerun the tests with this (unreasonnable) figure to check whether I 
really get a regression.

Other tests I ran with "reasonnable" settings on a large (scale=800) db 
did not show any significant performance regression, up to know.

-- 
Fabien.