Re: Apache waiting for i/o -> optimizing

Samuel Vogel <samy-delux@xxxxxx> · Wed, 19 Sep 2007 22:42:27 +0200

Yeah, I wanted to switch to MySQL based logs for some time now.

Right now, I could disable the access log completly, but I don't see a 

single CustomLog directive in my config files?

Where could it be defined, or how could I disable it anyways? I'm 

running Debian.

h1314632:~# grep CustomLog /etc/apache2/*
/etc/apache2/apache2.conf:# a CustomLog directive (see below).
h1314632:~# grep CustomLog /etc/apache2/*/*
h1314632:~#

Regards,
Samy

Bj schrieb:

Stop logging !
of maybe filter what you're logging (static ressources,...)

For exemple, this will prevent logging ressource calls begining with 

/javascript/ urls :

LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" 

\"%{User-Agent}i\"" combined

SetEnvIf Request_URI "^/javascript/.*$" jscript
CustomLog logs/access_log combined env=!jscript

You can try memory caching, if somes sites 

are more requested than others, it might help. Or cache only some urls.

Check if you don't have a database or cgi/php code that make lots of i/o.

--
Bj

On 9/18/07, *Samuel Vogel* < samy-delux@xxxxxx 

<mailto:samy-delux@xxxxxx>> wrote:

    Hey,

    The delivery of my sites is getting somewhat sluggish, so I
    checked top
    and it say that 30% of my CPU time is just waiting for i/o.
    Is there anything that I can do about this, as in optimizing Apache?
    I'm thinking about caching mechnisms, but I have now over 6.000 sites
    running, so I'm not expecting caching to be useful. Am I wrong on
    this?

    Since getting an addional server is not possible right now, is
    there any
    way to ease the situation?

    Regards,
    Samy

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