Re: Should we cacheline align PGXACT?

From: Daniel Gustafsson <daniel(at)yesql(dot)se>
To: Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru>
Cc: David Steele <david(at)pgmasters(dot)net>, Andres Freund <andres(at)anarazel(dot)de>, Ashutosh Sharma <ashu(dot)coek88(at)gmail(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Bernd Helmle <mailings(at)oopsware(dot)de>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Should we cacheline align PGXACT?
Date: 2017-09-18 09:41:12
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> On 16 Sep 2017, at 01:51, Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru> wrote:
> On Tue, Sep 5, 2017 at 2:47 PM, Daniel Gustafsson <daniel(at)yesql(dot)se <mailto:daniel(at)yesql(dot)se>> wrote:
> > On 04 Apr 2017, at 14:58, David Steele <david(at)pgmasters(dot)net <mailto:david(at)pgmasters(dot)net>> wrote:
> >
> > On 4/4/17 8:55 AM, Alexander Korotkov wrote:
> >> On Mon, Apr 3, 2017 at 9:58 PM, Andres Freund <andres(at)anarazel(dot)de <mailto:andres(at)anarazel(dot)de>
> >>
> >> I'm inclined to push this to the next CF, it seems we need a lot more
> >> benchmarking here.
> >>
> >> No objections.
> >
> > This submission has been moved to CF 2017-07.
> This CF has now started (well, 201709 but that’s what was meant in above), can
> we reach closure on this patch in this CF?
> During previous commitfest I come to doubts if this patch is really needed when same effect could be achieved by another (perhaps random) change of alignment. The thing I can do now is to retry my benchmark on current master and check what effect this patch has now.

Considering this I’ll mark this as Waiting on Author, in case you come to
conclusion that another patch is required then we’ll bump to a return status.

cheers ./daniel

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