apache overload, please help...

os: redhat9
ram: 512mb
cpu: celeron 2.4
hdd: 2x80GB

19:31:34 up 1 day, 51 min, 1 user, load average: 7.66, 9.27, 23.73
219 processes: 216 sleeping, 1 running, 1 zombie, 1 stopped
CPU states: 27.8% user 8.4% system 0.0% nice 0.0% iowait 63.6% idle
Mem: 514028k av, 507516k used, 6512k free, 0k shrd, 12480k buff
320316k active, 148696k inactive
Swap: 2104504k av, 101080k used, 2003424k free 68560k cached

sometimes its 250 load avg and 300-500proc apache overload, please help... all proc its apache..

apache conf:

maxclients 400
timeout 30
startserver 70 (i try small number and high number.. and nothing)
minspareserv 5
maxspareserv 10
keepalive off

anybody can help me ?! apache overload, please help...

 

 

 

 

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