On Tue, 2014-08-26 at 13:45 +0300, Heikki Linnakangas wrote:
> Yeah. This patch in the current state is likely much much slower than
> unpatched master, except in extreme cases where you have thousands of
> connections and short transactions so that without the patch, you spend
> most of the time acquiring snapshots.
What else are you looking to accomplish with this patch during this
'fest? Bug finding? Design review? Performance testing?
I haven't had a good track record with my performance testing recently,
so I'm unlikely to be much help there.
It seems a bit early for bug hunting, unless you think it will raise
possible design issues.
I think there's already at least one design issue to consider, which is
whether we care about CLOG/CSNLOG access for hinted records where the
xid > snapshot->xmin (that is, accesses that previously would have
looked at xip). Would more discussion help here or do we need to wait
for performance numbers?
Regards,Jeff Davis