Re: 9.5 release notes

On Tue, Jun 23, 2015 at 5:48 PM, Kevin Grittner <kgrittn@ymail.com> wrote:
> Andres Freund <andres@anarazel.de> wrote:
>>>      <listitem>
>>>       <para>
>>>        Improve concurrent locking and buffer scan performance (Andres
>>>        Freund, Kevin Grittner)
>>>       </para>
>>>      </listitem>
>>
>> If this is ab5194e6f, I don't think it makes sense to mention "buffer
>> scan" - it's just any lwlock, and buffer locks aren't the primary
>> benefit (ProcArrayLock, buffer mapping lock probably are that). I also
>
>> don't think Kevin was involved?
>
> It seems likely that 2ed5b87f9 was combined with something else in
> this reference.  By reducing buffer pins and buffer content locking
> during btree index scans it shows a slight performance gain in
> btree scans and avoids some blocking of btree index vacuuming.

I think maybe we should separate that back out.  The list needs to be
user-accessible, but if it's hard to understand what it's referring
to, that's not good either.

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
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