Performance tuning LAMP server

I have learned to do the following to get MYSQL to use more ram,  but can you force certain processes to take up more processing space (i.e Apche to use more CPU / RAM,  or MYSQL to use you memory).  

Is it all within the application confg files each time or is there a tool for ubuntu that can tune the server ?
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ncomperAsked:
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Ray PaseurConnect With a Mentor Commented:
Depending on the underlying cause of the performance issue, this article might be helpful.
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Ryan SmithSr. Systems EngineerCommented:
Take a look at this url.  Apache can be tuned.  Any time you make edits you have to restart apache.

http://hosting.com/support/linux/tuning-the-apache-prefork-mpm/
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arnoldCommented:
Each component can be fine tuned, you would first need to determine what performance issues and what is contributing to them.
Phpmyadmin is a tool to analyze mysql performance.

Apache, can be adjusted by controlling for the number of child process that are started, usually it is 5.

Improving mysql usually the processing consumer since more often than not, the PHP/mysql interactions are where usually performance impacts are.
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gheistCommented:
What problems are you experiencing?
Mysql: mysqltuner.pl tuning-primer.sh
Apache/php: switch to httpd-worker and php-chi via mod_fcgid
Not painless but reduces memory use 10x
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ncomperAuthor Commented:
Additional Information provided was very useful thanks
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