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Date: Mon, 22 Aug 2011 10:47:00 +0100
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 <CANCFF2bztwEojsByrLniPZksmx4Cs=kC8VNmb6QFnm=EgodT1A@mail.gmail.com>
Subject: Re: HTTP responses slower after first attempt
From: Chris Reynolds <shannowx@gmail.com>
To: dev@trafficserver.apache.org, users@trafficserver.apache.org,
	Chris Reynolds <shannowx@gmail.com>
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Hi,

I have managed to resolve this problem. If the
proxy.config.http.share_server_sessions config value is set to 0 then this
problem does not occur - the default is 1. When running performance tests I
was using the same server.

Is this a bug? I would have thought that sharing server sessions would make
the performance faster not slower.

Chris Reynolds.

On 22 August 2011 09:48, Chris Reynolds <shannowx@gmail.com> wrote:

> Hi,
>
> I am performing some basic performance tests with Traffic Server with and
> without a plugin I have written. I have noticed that if you download
> (without any plugin enabled) a file then download another file that the
> second download is a lot slower that the first one - over 10 times as slow.
> If you then wait for about 10-20 seconds it is back to the original speed.
>
> For example downloading an 8MB file using wget takes about 0.09s, but
> downloading the same or another 8 MB file on the same server again it is
> 1.3s. If I bypass the proxy then the files always downloads at about 0.07s.
>
> This seems to be affecting the overall performance of Traffic Server. Note
> I am using version 3.0.0 with no caching enabled.
>
> Has any one got any ideas?
>
> Thank-you,
>
> Chris Reynolds.
>
>
>

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Hi,<div><br></div><div>I have managed to resolve this problem. If the proxy=
.config.http.share_server_sessions config value is set to 0 then this probl=
em does not occur - the default is 1. When running performance tests I was =
using the same server.</div>
<div><br></div><div>Is this a bug? I would have thought that sharing server=
 sessions would make the performance faster not slower.</div><div><br></div=
><div>Chris Reynolds.<br><br><div class=3D"gmail_quote">On 22 August 2011 0=
9:48, Chris Reynolds <span dir=3D"ltr">&lt;<a href=3D"mailto:shannowx@gmail=
.com">shannowx@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex;">Hi,<div><br></div><div>I am performing some=
 basic performance tests with Traffic Server with and without a plugin I ha=
ve written. I have noticed that if you download (without any plugin enabled=
) a file then download another file that the second download is a lot slowe=
r that the first one - over 10 times as slow. If you then wait for about 10=
-20 seconds it is back to the original speed.</div>

<div><br></div><div>For example downloading an 8MB file using wget takes ab=
out 0.09s, but downloading the same or another 8 MB file on the same server=
 again it is 1.3s. If I bypass the proxy then the files always downloads at=
 about 0.07s.</div>

<div><br></div><div>This seems to be affecting the=A0overall=A0performance =
of Traffic Server. Note I am using version 3.0.0 with no caching enabled.</=
div><div><br></div><div>Has any one got any ideas?</div><div><br></div><div=
>

Thank-you,</div><div><br></div><font color=3D"#888888"><div>Chris Reynolds.=
</div><div><br></div><div><br></div>
</font></blockquote></div><br></div>

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