Hello!

On Fri, Sep 30, 2011 at 10:56:41PM +0800, li zJay wrote:

> hello!
>
> If you want nginx to don't touch disk, use
> >
> > proxy_max_temp_file_size 0;
> >
> > instead. This will still allow in-memory buffering and wouldn't
> > touch disk.
> >
>
> Because the client bandwidth is usually slow, in this case, tons of upstream
> content will be buffer in memory before sent out to client, and then the
> swap will be used and the server is going down soon.

The limit on memory usage for proxy buffering is set with
proxy_buffers directive, 8 * pagesize by default. Nobody stops
you from setting it even lower if you are memory-constrained.

The "proxy_buffering off;" is needed when you want response to be
immediately passed to clients once it arrives. It's critical for
streaming and similar workloads where you can't afford delays.
But it's not a switch to limit resource consumption. Instead, it
actually implies less effective resource usage: processing of
requests without buffering takes more CPU time and may cause
suboptimal network utilization.

Maxim Dounin

>
> On Fri, Sep 30, 2011 at 5:18 PM, Maxim Dounin <mdounin@mdounin.ru> wrote:
>
> > Hello!
> >
> > On Fri, Sep 30, 2011 at 04:22:52PM +0800, li zJay wrote:
> >
> > > set "proxy_buffering on", the upstream response may touch the disk
> > > this suffers a lot when nginx is used as a proxy to file download
> > servers.
> >
> > If you want nginx to don't touch disk, use
> >
> > proxy_max_temp_file_size 0;
> >
> > instead. This will still allow in-memory buffering and wouldn't
> > touch disk.
> >
> > Maxim Dounin
> >
> > >
> > > On Thu, Sep 29, 2011 at 7:31 AM, mojiz <nginx-forum@nginx.us> wrote:
> > >
> > > > Thanks Max.
> > > > It worked!
> > > >
> > > > Posted at Nginx Forum:
> > > > http://forum.nginx.org/read.php?2,215989,215991#msg-215991
> > > >
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> > >
> > >
> > >
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>
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