In Linux, when I use the PS command, why do I see multiple lines for www-data?

Posted by johnlai2004 on Server Fault See other posts from Server Fault or by johnlai2004
Published on 2010-03-16T16:37:05Z Indexed on 2010/03/16 16:41 UTC
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apache

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ps

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linux

I have a LAMP server that uses ubuntu 9.10, apache2, mysql5 and php5.

When I login as root through the shell, I run a "ps aux" command and see something like the following

www-data  3151  0.1  4.3 220024 31032 ?        S    12:22   0:00 /usr/sbin/apache2 -k start
www-data  3153  0.2  3.6 214776 26020 ?        S    12:22   0:01 /usr/sbin/apache2 -k start
www-data  3162  0.3  5.1 225060 36920 ?        S    12:26   0:01 /usr/sbin/apache2 -k start
www-data  3163  0.1  4.1 218872 29664 ?        S    12:26   0:00 /usr/sbin/apache2 -k start

How come I see multiple lines for www-data? Does each line represent an actual user on my website?

I run into memory issues at times, so I'm trying to determine if these www-data statistics are related.

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