Will NGX_AGAIN kill performance?

Server NGINX
#1

hi,

i currently dev a module which makes multi subrequest sequently in the
access phase handler, via returning NGX_AGAIN.

my question is, will this kill the performance? and how far could it go
in
killing performance.

thx!

Abioy

#2

On Sat, Sep 24, 2011 at 10:47 PM, Abioy S. [email protected] wrote:

hi,

i currently dev a module which makes multi subrequest sequently in the
access phase handler, via returning NGX_AGAIN.

my question is, will this kill the performance? and how far could it go in
killing performance.

NGX_AGAIN is usually for non-blocking I/O operations, it’s key for
good performance under high concurrency levels.

Regards,
-agentzh

#3

hi,

NGX_AGAIN is usually for non-blocking I/O operations, it’s key for
good performance under high concurrency level
in fact, that’s what i’m doing. but i also doubt if the main request
wake up
every time an event arrived(made by not only subrequest), will it spent
most
of the time doing sth useless?

thx

Abioy