Gzip vs. sendfile
mdounin at mdounin.ru
Tue Aug 25 12:39:25 UTC 2015
On Mon, Aug 24, 2015 at 11:50:10PM +0200, Joó Ádám wrote:
> From <https://www.nginx.com/blog/tuning-nginx/>:
> > Note, however, that because the data never touches user space
> > it’s not subject to the filters in the regular NGINX
> > processing chain. As a result, filters that change content,
> > for example the gzip filter, have no effect.
> Which never occurred to me, but sounds reasonable. What is more
> surprising is that I found virtually no discussion on this, and
> I wasn’t able to reproduce it.
The statement quoted is incorrect. Instead, if any filter is going
to change content, sendfile won't be used. I'll ping Rick to fix
> Is it actually the other way around and filters disable sendfile?
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