Apache HTTP Server 2.4 Problem Diagnosis
Apache HTTP Server 2.4 Problem Diagnosis
Apache HTTP Server 2.4 Problem Diagnosis
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nginx — DTrace-ing<br />
<strong>Apache</strong> <strong>HTTP</strong><br />
<strong>Server</strong> <strong>2.4</strong><br />
<strong>Problem</strong><br />
<strong>Diagnosis</strong><br />
Jeff Trawick<br />
Introduction<br />
What kinds of<br />
issues<br />
encountered<br />
Using tools<br />
inside the web<br />
server<br />
Looking from<br />
the outside<br />
What if you<br />
build the code<br />
differently<br />
There’s a fork of nginx 1.2.1 (slightly out of date) that<br />
includes DTrace probes (and System Tap too). (unclear<br />
how experimental this is)<br />
The pid provider needs to be provided the pid to trace,<br />
which is not a burden with nginx. This is the provider that<br />
allows instrumentation of arbitrary functions in the<br />
process. The nginx docs have some minimal information<br />
about using the pid provider with it.<br />
Compare with<br />
httpd 2.2 and<br />
nginx<br />
References<br />
and further<br />
reading
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