bug in nginx-0.8.28

[Maxim Dounin]

Hello!

On Thu, Nov 26, 2009 at 03:28:22AM -0800, Paul Roland wrote:

> requests with no pauses using apache's benchmark.

With concurrency == 1 (ab -c 1, the default)?  So it's expected 
result, not a bug.

> I need a way to limit 5 connections per ip.
> 
> also tried:
> 
> limit_zone   one  $binary_remote_addr  10m;
> limit_conn   one  5;
> 
> this setting is completely ignored for some reasons.

If you try to do this while having "limit_req_zone ... 
zone=one:10m ..." in config, you should see something like this 
while starting nginx or testing configuration:

[emerg]: the shared memory zone "one" is already declared for a different use in ...

I believe this message is self-explaining.

Note well: limit_conn limits number of connections which process 
requests (not just established/kept alive connections, and not 
even connections reading request headers).  It's effect usually 
can't be seen while testing against small static file (as request 
processing happens in one turn here).

Maxim Dounin

> 
> --- On Thu, 11/26/09, Maxim Dounin <mdounin at mdounin.ru> wrote:
> 
> > From: Maxim Dounin <mdounin at mdounin.ru>
> > Subject: Re: bug in nginx-0.8.28
> > To: nginx at nginx.org
> > Date: Thursday, November 26, 2009, 1:08 PM
> > Hello!
> > 
> > On Thu, Nov 26, 2009 at 12:20:20AM -0800, Paul Roland
> > wrote:
> > 
> > > I have:
> > > 
> > >     
> >    limit_req_zone 
> > $binary_remote_addr 
> > zone=one:10m   rate=5r/s;
> > >     
> >    limit_req   zone=one 
> > burst=5;
> > > 
> > > in http zone.
> > > 
> > > whatever changes I make ot that directive even if I
> > set 100/s won't serve more than 2 requests per second.
> > > 
> > > maybe Im doing it wrong?
> > 
> > Are you testing it with single stream of requests without
> > pauses 
> > between them?
> > 
> > In this case result of 2 reqs/second is somewhat expected,
> > since 
> > every second request will be delayed for something like 1
> > second 
> > as it follows previous request immediately.
> > 
> > Maxim Dounin
> > 
> > _______________________________________________
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> > nginx at nginx.org
> > http://nginx.org/mailman/listinfo/nginx
> > 
> 
> 
>       
> 
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