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Date: Mon, 16 Nov 2009 20:17:36 +0100
Message-ID: <d6a2419d0911161117i1471093fwbe3c67dae5afb88b@mail.gmail.com>
From: Bostjan Skufca <bostjan@lenivec.com>
To: users@httpd.apache.org
Content-Type: multipart/alternative; boundary=00163646dbdcc49371047881dc07
Subject: [users@httpd] Lots of page faults

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Hi everybody!

I have noticed that Apache (2.2.14/linux) is causing a lot of page faults
while serving any request, be it static file or some application server
stuff.

Correlation goes like this:
- benchmark is started with 4 ab processes with 32 clients each.
- benchmark results at around 2k requests per second for tiny static file
- page faults start at rate 2 x requests/s but in a couple of seconds drop
to 1-to-1 correlation with req/s.

I tried to exclude logging and only external module (PHP) but did not help.
Openssl support is also compiled in.

Can anyone point me in some direction where I should look/search to resolve
this? Or is this normal behaviour?

Thank you very much,
Bostjan

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Hi everybody!<br><br>I have noticed that Apache (2.2.14/linux) is causing a=
 lot of page faults while serving any request, be it static file or some ap=
plication server stuff.<br><br>Correlation goes like this:<br>- benchmark i=
s started with 4 ab processes with 32 clients each.<br>
- benchmark results at around 2k requests per second for tiny static file<b=
r>- page faults start at rate 2 x requests/s but in a couple of seconds dro=
p to 1-to-1 correlation with req/s.<br><br>I tried to exclude logging and o=
nly external module (PHP) but did not help. Openssl support is also compile=
d in.<br>
<br>Can anyone point me in some direction where I should look/search to res=
olve this? Or is this normal behaviour?<br><br>Thank you very much,<br>Bost=
jan<br><br>

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