[tbnl-devel] Firefox

[Bob Hutchison]

On Sep 30, 2005, at 2:08 PM, Anthony F wrote:


> Perhaps "Leak" was too strong a word.  I'm not sure exactly what is  
> going on yet, but here are the symptoms:
>
> I start Apache, then TBNL.  I hit the test page with Firefox.   
> While watching the Process tab in Task Manager I follow a link.   
> Memory usage on the LispWorks process jumps anywhere from 2 to 5  
> megs.  Following any other links within the test app or refreshing  
> the page causes the same until I hit LispWorks Personal's heap size  
> limit and it dies.
>
> I have yet to check if restarting Apache fixes the problem, but I  
> will report on that later.  HOWEVER, I notice that even with IE a  
> very small amount of memory seems to be leaking?  If you hit the  
> Test app from IE, follow a link and/or repeatedly refresh I notice  
> memory usage on the LispWorks process creep upwards ever so slowly.
>

Hmm, I do not experience this with my application at all. Now, I do  
know that it takes a while for memory usage in LW to settle down. You  
might want to try automating it with wget+script or ab and see what  
happens. (ab is apache's benchmarking tool, and that's where the name  
comes from)

Now, under OS/X using TBNL standalone I do get an infinite growth in  
memory that will eventually kill LW -- eventually is within a few  
seconds (or if I'm using ab, a small fraction of a second). This  
doesn't happen under linux (by personal testing) or windows (by  
report). It also doesn't happen using Araneida or Apache on OS/X. I  
mention this because you might have somehow encountered this problem  
with a different configuration. Unfortunately, I have never worked  
out what the problem is.


>
> Having said this, I have not actually done any real investigating  
> yet (like I said, I'm a total newb)... so this may or may not be a  
> result of expected behavior.
>
> On a seperate note:  I don't really want to start a mod_lisp vs.  
> other options war, but is anyone using a Lisp server  
> (AllegroServer, TBNL's server, etc) back end in a production  
> environment?  I was wondering about performance, security, other  
> issues, etc.  Personally, I feel "safer" using Apache as it's  
> battle hardened and fairly ubiquitous, but maybe those feelings are  
> unfounded?  Any comments?
>

I've been running a demo version of the system I've been working on,  
stand-alone TBNL on linux, light load, but running continuously since  
the first week of June. Performance of TBNL without Apache in front  
of it (either Araneida or standalone) is phenomenal -- I've got a  
Java background and this level of performance is hard to get used  
to :-) Apache slows this down by pretty much exactly a factor of two  
on OS/X, but that is still an embarrassment for Java -- no Java  
server that I've used (tomcat, jetty, jboss, weblogic, websphere,  
resin, jrun) can do anything like this. Edi's done a wonderful job  
with TBNL -- fast and easy to use.

Cheers,
Bob


>
> Thanks!
>
> Anthony
>
> ----- Original Message ----- From: "Edi Weitz" <edi at agharta.de>
> To: "Bob Hutchison" <hutch at recursive.ca>
> Cc: <tbnl-devel at common-lisp.net>
> Sent: Friday, September 30, 2005 6:26 AM
> Subject: Re: [tbnl-devel] Firefox
>
>
>
>
>> On Fri, 30 Sep 2005 09:01:01 -0400, Bob Hutchison  
>> <hutch at recursive.ca> wrote:
>>
>>
>>
>>> And you know, thinking about it, I think I had to restart Apache
>>> too.
>>>
>>>
>>
>> Yeah, that's one of the drawbacks of the mod_lisp backend - during
>> development there are situations where you /must/ restart Apache or
>> you have to cope with dangling connections.  I'm glad you contributed
>> the stand-alone backend, that's what I'm using for development
>> now... :)
>>
>> To the OP: Firefox/Win is my main browser and LispWorks is my main
>> Lisp platform.  I'm not aware of any problems specific to these.   
>> What
>> exactly do you mean by "seemed to leak 3-4 megs per click?"
>>
>> As for the session stuff in the logs you might want to check with
>> something like "Live HTTP Headers" to see what's going on.
>>
>> Cheers,
>> Edi.
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>>
>>
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>

----
Bob Hutchison          -- blogs at <http://www.recursive.ca/hutch/>
Recursive Design Inc.  -- <http://www.recursive.ca/>
Raconteur              -- <http://www.raconteur.info/>