#! /bin/sh

case "$1" in
start)
	sysctl -p > /dev/null
        ;;

*)      echo "Usage: $0 {start}"
        exit 1
        ;;
esac

# tweak tcp                                                                                                                                                              
net.ipv4.tcp_window_scaling = 1                                                                                                                                          
net.ipv4.tcp_sack = 1                                                                                                                                                    
net.ipv4.tcp_keepalive_time = 1800                                                                                                                                       
net.ipv4.tcp_fin_timeout = 10                                                                                                                                            
net.ipv4.tcp_timestamps = 0                                                                                                                                              
net.ipv4.tcp_dsack = 1                                                                                                                                                   
net.ipv4.tcp_max_syn_backlog = 96                                                                                                                                        
net.ipv4.tcp_ecn = 1                                                                                                                                                     
net.core.rmem_max = 2097152                                                                                                                                              
net.core.wmem_max = 2097152                                                                                                                                              
net.ipv4.tcp_rmem = 16384 65536 2097152                                                                                                                                  
net.ipv4.tcp_wmem = 16384 32768 2097152                                                                                                                                  
                                                                                                                                                                         
# Make the system a little more swap happy                                                                                                                               
vm.swappiness = 50                                                                                                                                                       
vm.vfs_cache_pressure = 200                                                                                                                                              
                                                                                                                                                                         
# Lower the amount of free ram before the kernel kicks it up a notch                                                                                                     
vm.min_free_kbytes = 512                                                                                                                                                 
                                                                                                                                                                         
# swap early                                                                                                                                                             
vm.dirty_background_ratio = 5                                                                                                                                            
vm.dirty_ratio = 20                                                                                                                                                      
# This is flash, we don't face the same latency penalty as a HD so don't prefetch pages                                                                                  
# from swap                                                                                                                                                              
vm.page-cluster = 2