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From Jess Holle <>
Subject [users@httpd] Apache 2.x perf degradation on large downloads on Windows
Date Thu, 28 Sep 2006 21:08:29 GMT
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


    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.

Jess Holle

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