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From Jess Holle <je...@ptc.com>
Subject Re: Apache 2.x perf degradation on large downloads on Windows
Date Thu, 28 Sep 2006 21:10:57 GMT
Jess Holle wrote:
> I'm seeing what appears to be really severe performance degradation 
> during the course of really large downloads (e.g. 800MBs) on Windows 
> Apache's -- both 2.0.x (recent builds) and 2.2.3.
>
> Has anyone else seen this?  Is this just a lack of tuning?  If so, 
> pointers would be appreciated.
>
> Note we're using:
>
>     SendBufferSize 16384
>
> and
>
>     EnableSendfile Off
>
> Before blaming the latter setting, however, I should point out that 
> the problem we're seeing exists both for this case with simple static 
> file downloads and for dynamic downloads through mod_jk and Tomcat 
> (we've only tested this case with 2.0.x).  The latter case is actually 
> our real issue, but unless/until static file downloads don't show this 
> degradation there seems to be little point in chasing the (more 
> complex) dynamic case.
Also the enabling send file does not seem to make any difference to the 
results.

--
Jess Holle


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