Re: patch for new feature: Buffer Cache Hibernation

On 06/01/2011 03:03 AM, Tatsuo Ishii wrote:
> Also I really want to see the performance comparison between these two
> approaches in the real world database.
>

Well, tell me how big of a performance improvement you want PgFincore to
win by, and I'll construct a benchmark where it does that. If you pick
a database size that fits in the OS cache, but is bigger than
shared_buffers, the difference between the approaches is huge. The
opposite--trying to find a case where this hibernation approach wins--is
extremely hard to do.

Anyway, further discussion of this patch is kind of a waste right now.
We've never gotten the patch actually sent to the list to establish a
proper contribution (just pointers to a web page), and no feedback on
that or other suggestions for redesign (extension repackaging, GUC
renaming, removing unused code, and a few more). Unless the author
shows up again in the next two weeks, this is getting bounced back with
no review as code we can't use.

--
Greg Smith 2ndQuadrant US greg(at)2ndQuadrant(dot)com Baltimore, MD
PostgreSQL Training, Services, and 24x7 Support www.2ndQuadrant.us