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From "Leandro Dardini" <l.dard...@comune.prato.it>
Subject R: R: R: Newer version of mod_jk much slower than 1.2.13
Date Tue, 26 Aug 2008 06:26:39 GMT
> -----Messaggio originale-----
> Da: Rainer Jung [mailto:rainer.jung@kippdata.de] 
> Inviato: venerdì 22 agosto 2008 21.09
> A: Tomcat Users List
> Oggetto: Re: R: R: Newer version of mod_jk much slower than 1.2.13
> 
> Hi Leandro,
> 
> Leandro Dardini schrieb:
> > LoadModule jk_module modules/mod_jk.so
> > 
> > JkWorkersFile /etc/httpd/conf/workers.properties
>  > JkLogFile /etc/httpd/logs/mod_jk.log
>  > JkLogLevel info
> 
> OK
> 
> > About the trace level, full it is over 700Kbyte (gzipped), 
> I send it 
> > directly to you. Thank you very much if you can look at it.
> > 
> > 
> > Looking to tcpdump flow of packets between client and apache web 
> > server, I notice a lots of small packets. With older version of 
> > mod_jk, there are instead fewer packets of bigger size.
> 
> Yes, that's the problem, but I don't see, how mod_jk 
> influences that, it's a decision of the backend how to chunk 
> the data. Maybe we now stream them back sooner than before, 
> but I doubt it.
> 
> I asked about a log file for the old and for the new version. 
> Could you provide the one for the old version too?
> 
> There are 10630 packets received by mod_jk from the backend, 
> and 6608 of those are empty (no data, only AJP protocol header).
> 
> The first packet is received after about 200 milliseconds, 
> each further packet takes 1-2 milliseconds. I want to compare 
> with the log when you use 1.2.13. If possible please send the 
> exact same request with the same httpd and the same backend, 
> only using 1.2.13 instead of 1.2.26.
> 
> Regards,
> 
> Rainer
> 
> 
> 
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> 
> 

The saga continues. Privately I send you the mod_jk.log using the latest versione of mod_jk
with trace debug. 

A very big thank you.

Leandro

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