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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 21:51:32 GMT
Jess Holle wrote:
> In some of my testing, Win32DisableAcceptEx seems to make a huge 
> improvement, however...
Okay, I take that back...
> Jess Holle wrote:
>> 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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