cache: move open to thread pool

[Ka-Hing Cheung]

Hi Maxim and Roman,

We've been running a version of your patches in our test colo for the
past week with no ill effects, with the caveat that it's difficult to
measure performance impacts in our test colo because of varying
traffic. We had to massage the patches a bit because we don't run
vanilla nginx. Also we've only tried with open file cache disabled.

Let me know if you are looking for other feedback.

- Ka-Hing

On Mon, Jan 14, 2019 at 5:53 PM Ka-Hing Cheung <kahing at cloudflare.com> wrote:
>
> We didn't get to it last year because of other priorities but this is
> being worked on. We don't use a vanilla nginx so it takes effort to
> integrate your patches. Having a version of this in upstream nginx is
> important to us and to me personally.
>
> On Thu, Jan 10, 2019 at 12:30 AM Maxim Konovalov <maxim at nginx.com> wrote:
> >
> > So guys, are you really interested in this work beyond shiny
> > marketing blog posts?
> >
> > On 05/12/2018 12:43, Maxim Konovalov wrote:
> > > Hello,
> > >
> > > just a reminder that we are looking for a tester for these patches.
> > >
> > > Thanks,
> > >
> > > Maxim
> > >
> > > On 16/11/2018 12:10, Maxim Konovalov wrote:
> > >> Thanks, Ka-Hing, we'll wait for your feedback.
> > >>
> > >> On 16/11/2018 01:53, Ka-Hing Cheung wrote:
> > >>> Hi,
> > >>>
> > >>> I didn't forget about this. I am pretty swamped at the moment and
> > >>> there's a holiday freeze coming up. Will get to his in December.
> > >>>
> > >>> - Ka-Hing
> > >>>
> > >>> On Thu, Nov 8, 2018 at 6:19 AM Maxim Konovalov <maxim at nginx.com> wrote:
> > >>>>
> > >>>> Hi Ka-Hing,
> > >>>>
> > >>>> would you mind to test Roman's most recent patches that add
> > >>>> "aio_open" directive?
> > >>>>
> > >>>> http://mailman.nginx.org/pipermail/nginx-devel/2018-November/011538.html
> > >>>>
> > >>>> We are looking for overall performance and stability metrics and
> > >>>> feedback.
> > >>>>
> > >>>> Much appreciated,
> > >>>>
> > >>>> Maxim
> > >>>>
> > >>>> --
> > >>>> Maxim Konovalov
> > >>
> > >>
> > >
> > >
> >
> >
> > --
> > Maxim Konovalov
> > _______________________________________________
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