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Cannot allocate memory: fork: Unable to fork new process
      
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top, ps, free, apache2ctl fullstatus, , — ( 192 RAM), 400 RAM ( , ). mysql, prefork apache2 php, , , . . Apache2 , ( , ).
(192 RAM):
Timeout 300
      
        
        
        
      
    
KeepAlive On
      
        
        
        
      
    
MaxKeepAliveRequests 100
      
        
        
        
      
    
KeepAliveTimeout 15
      
        
        
        
      
    
< IfModule mpm_prefork_module >
      
        
        
        
      
    
 StartServers 5
      
        
        
        
      
    
 MinSpareServers 5
      
        
        
        
      
    
 MaxSpareServers 10
      
        
        
        
      
    
 MaxClients 150
      
        
        
        
      
    
 MaxRequestsPerChild 0
      
        
        
        
      
    
      
      , , . swap . , « nginx, . swap » ( «» , , .. DDoS ). , , , OpenVZ swap linux. , OpenVZ , , , apache2 . , 600 . , , .
( ) 600 RAM:
Timeout 90
      
        
        
        
      
    
KeepAlive On
      
        
        
        
      
    
MaxKeepAliveRequests 50
      
        
        
        
      
    
KeepAliveTimeout 3
      
        
        
        
      
    
< IfModule mpm_prefork_module >
      
        
        
        
      
    
 StartServers 1
      
        
        
        
      
    
 MinSpareServers 1
      
        
        
        
      
    
 MaxSpareServers 1
      
        
        
        
      
    
 MaxClients 2
      
        
        
        
      
    
 MaxRequestsPerChild 300
      
        
        
        
      
    
      
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UPD: , 12 , . nginx OpenVZ . FastVPS.ru , .