| From: | Oleg Bartunov <obartunov(at)gmail(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Aleksander Alekseev <a(dot)alekseev(at)postgrespro(dot)ru>, Robert Haas <robertmhaas(at)gmail(dot)com>, Teodor Sigaev <teodor(at)sigaev(dot)ru>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Patch: fix lock contention for HASHHDR.mutex |
| Date: | 2015-12-30 15:10:22 |
| Message-ID: | CAF4Au4y4MTapP2u3uGtBQd_z0CHEsJWfNAvRgK4umfcWA4ELxQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Dec 30, 2015 at 5:44 PM, Andres Freund <andres(at)anarazel(dot)de> wrote:
> On 2015-12-30 11:37:19 -0300, Alvaro Herrera wrote:
> > Aleksander Alekseev wrote:
> >
> > > Here is a funny thing - benchmark results I shared 22.12.2015 are wrong
> > > because I forgot to run `make clean` after changing lwlock.h (autotools
> > > doesn't rebuild project properly after changing .h files).
> >
> > Running configure with --enable-depend should avoid this problem.
>
> I still maintain that --enable-depend should be on by default. We're
>
+1
> absurdly optimizing towards saving a handful of cycles in scenarios
> which are usually bottlenecked by other things (build boxes spend more
> times on tests and such), rather than optimizing for developer time. I
> don't know how many people failed setting --enable-depend by now, but it
> definitely goes into several hundres of wasted ours territory.
>
>
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