Re: Initial release notes created for 9.6

On Fri, May 6, 2016 at 12:11 AM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>
> On Thu, May 5, 2016 at 1:32 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> > * As is somewhat customary for early drafts of the notes, I've made no
> > attempt to call out which are the most significant changes. I've not
> > tried to isolate the non-backwards-compatible items, either.
>
> There was quite a bit of discussion of this on pgsql-advocacy, and the
> press release we're going to put out surely must say something. It
> wouldn't hurt if the release notes at least somewhat matched that.
>

I think with PostgreSQL 9.6, the OLTP workloads (short queries) will see a
major performance improvement for both read-write as well as read-only
workloads mainly due to below features (there could be others as well, but
this is what comes to my mind first):

Replace shared-buffer header spinlocks with atomic operations to improve
scalability
Partition the freelist for shared hash tables, to reduce contention on
many-CPU servers
Reduce contention for the ProcArrayLock
Where feasible, trigger kernel writeback after a configurable number of
writes
Increase the number of clog buffers for better scalability

I think we should add that as a significant change.

With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com