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Date: Sun, 24 Nov 2013 22:36:29 -0800
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Subject: No logs without proxy.config.http.enable_http_stats=1
From: Mark Moseley <moseleymark@gmail.com>
To: users@trafficserver.apache.org
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(ATS 4.1.1, Ubuntu Precise 64-bit)

This may easily be chalked up to 'well, that's how it's supposed to work',
but I figured I'd ask anyway.

I was scratching my head trying to figure out why I couldn't get any of the
http logging working. strace'ing would show ATS opening the files,
optionally rotating old ones, but never actually writing anything to them.

I was going through all the options that were different from the
out-of-the-box config that the source comes with and finally got logging
working when I switched my config from
proxy.config.http.enable_http_stats=0 to =1. It could be somehow
interacting with other settings I've got, but I could definitely enable and
disable logging by toggling that option.

I can definitely see the connection between the two things, stats and
logging (of those stats). I had taken the warning in the configs, "The HTTP
stats are expensive, turn off you don't need them", so I had turned that
option off. But I expected that it referred to the various HTTP UI pages
you can poke around the various ATS statistics with, not anything to do
with logging.

* Is that supposed to disable logging?

* Is the "The HTTP stats are expensive, turn off you don't need them"
warning still apply in current versions of ATS?

*Summary logging is very cool. Is there a selector or something that you
can apply to a logging tag? I'm trying to get the HIT vs MISS stats in the
summary. Something like "%<COUNT(crc==HIT)> %<COUNT(crc=MISS)>" would be
pretty cool to be able to do.

Thanks! Sorry for all the questions.

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<div dir=3D"ltr"><div><div><div><div><div><div><div>(ATS 4.1.1, Ubuntu Prec=
ise 64-bit)<br><br></div>This may easily be chalked up to &#39;well, that&#=
39;s how it&#39;s supposed to work&#39;, but I figured I&#39;d ask anyway. =
<br>
<br></div>I was scratching my head trying to figure out why I couldn&#39;t =
get any of the http logging working. strace&#39;ing would show ATS opening =
the files, optionally rotating old ones, but never actually writing anythin=
g to them.<br>
<br></div>I was going through all the options that were different from the =
out-of-the-box config that the source comes with and finally got logging wo=
rking when I switched my config from proxy.config.http.enable_http_stats=3D=
0 to =3D1. It could be somehow interacting with other settings I&#39;ve got=
, but I could definitely enable and disable logging by toggling that option=
.<br>
<br></div>I can definitely see the connection between the two things, stats=
 and logging (of those stats). I had taken the warning in the configs, &quo=
t;The HTTP stats are expensive, turn off you don&#39;t need them&quot;, so =
I had turned that option off. But I expected that it referred to the variou=
s HTTP UI pages you can poke around the various ATS statistics with, not an=
ything to do with logging.<br>
<br></div>* Is that supposed to disable logging? <br><br></div>* Is the &qu=
ot;The HTTP stats are expensive, turn off you don&#39;t need them&quot; war=
ning still apply in current versions of ATS?<br><br></div><div>*Summary log=
ging is very cool. Is there a selector or something that you can apply to a=
 logging tag? I&#39;m trying to get the HIT vs MISS stats in the summary. S=
omething like &quot;%&lt;COUNT(crc=3D=3DHIT)&gt; %&lt;COUNT(crc=3DMISS)&gt;=
&quot; would be pretty cool to be able to do.<br>
</div><div><br></div>Thanks! Sorry for all the questions.<br></div>

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