[hunchentoot-devel] serious H'toot performance problem on CCL OSX ?

[lukas.georgieff at hotmail.com]

Hi John,

we are using hunchentoot for a while in our application and made a similar 
experience.
We're using it with SBCL on ubuntu and MAC systems.

Another problem that we are currently debugging is that the needed memory on 
two or more parallel requests is not released, so the machine stops working 
when there is no RAM available. But at the moment we are not sure if this 
problem is 100% caused by hunchentoot.



Best regards

lukas



--------------------------------------------------
From: "JTK" <jetmonk at gmail.com>
Sent: Thursday, August 19, 2010 1:53 AM
To: <tbnl-devel at common-lisp.net>
Subject: [hunchentoot-devel] serious H'toot performance problem on CCL OSX ?

>
> Hello,
>
> I'm finding that the speed of hunchentoot falls drastically for more than 
> 1 simultaneous connection,
> at least for CCL on OS X.  And more than a few connections just fails.
>
> I downloaded the latest svn version from http://bknr.net/html/
>
> To reduce any complicating factors, I loaded just h'toot and ran ccl on 
> the shell command line, not in slime.
>
> I tried a simple page:
>
> CL-USER> (hunchentoot:start (make-instance 'hunchentoot:acceptor :port 
> 4242))
> #<ACCEPTOR (host *, port 4242)>
> CL-USER> (hunchentoot:define-easy-handler (say-yo :uri "/yo") ()
>  (setf (hunchentoot:content-type*) "text/plain")
>  "Yo! This. Is. Content")
> SAY-YO
>
> Then I tried the ab (apache bench) benchmark with c=1 (1 connection), and 
> 500
> iterations:
>
> $ ab -n 500 -c 1   http://127.0.0.1:4242/yo
>
>  HTML transferred:       10500 bytes
>  Requests per second:    138.26 [#/sec] (mean)   <- ##### note speed 
> ######
>  Time per request:       7.233 [ms] (mean)
>  Time per request:       7.233 [ms] (mean, across all concurrent requests)
>  Transfer rate:          22.82 [Kbytes/sec] received
>
>
> Then I tried it with TWO concurrent connections:
>
> $ ab -n 500 -c 2   http://127.0.0.1:4242/yo
>
>  HTML transferred:       10500 bytes
>  Requests per second:    29.10 [#/sec] (mean)    <- ##### note speed 
> ######
>  Time per request:       68.722 [ms] (mean)
>  Time per request:       34.361 [ms] (mean, across all concurrent 
> requests)
>  Transfer rate:          4.80 [Kbytes/sec] received
>
> It's nearly 5x slower with just 2 simultaneous connections, going from 138 
> to 34 requests/sec.
>
> 10 connections gives the same speed as 2, and 30 fails because connection 
> was reset by peer (maybe my fault for not having enough open files 
> available, but it should never open more than 30 filehandles at once, 
> no?).
>
> I'm running on a Mac OS X 10.6 with CCL "Version 1.4-r13119 
> (DarwinX8664)"
>
> Can anyone else reproduce this?  Is it some threading problem?
>
> John
>
>
>
>
>
>
>
>
>
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