httpd.conf - VPS Optimization

#1
I read about VPS Optimization guide from
http://www.earnersblog.com/vps-optimization-guide/

Do i still need to add
1. KeepAlive On
2. MaxKeepAliveRequests 100
3. KeepAliveTimeout 1
4. MinSpareServers 5
5. MaxSpareServers 10
6. StartServers 5
7. MaxClients 150
8. MaxRequestsPerChild 1000

to httpd.conf ?

Any hint to optimize VPS server with 512 mb guaranteed RAM and 1535mb burst ram?
 
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