嘻嘻哈哈的部落格(blog)

# increase Linux TCP buffer limits
echo 8388608 > /proc/sys/net/core/rmem_max
echo 8388608 > /proc/sys/net/core/wmem_max

# increase Linux autotuning TCP buffer limits
echo "4096 87380 8388608" > /proc/sys/net/ipv4/tcp_rmem
echo "4096 65536 8388608" > /proc/sys/net/ipv4/tcp_wmem

#echo 65536 > /proc/sys/fs/file-max      # physical RAM * 256/4

echo "1024  65000" > /proc/sys/net/ipv4/ip_local_port_range

#echo 1 > /proc/sys/net/ipv4/tcp_syncookies
echo 8192 > /proc/sys/net/ipv4/tcp_max_syn_backlog
# Decrease the time default value for tcp_fin_timeout connection
#echo 30 > /proc/sys/net/ipv4/tcp_fin_timeout
#echo 3 > /proc/sys/net/ipv4/tcp_syn_retries
#echo 2 > /proc/sys/net/ipv4/tcp_retries1
# Decrease the time default value for tcp_keepalive_time connection
#echo 1800 >/proc/sys/net/ipv4/tcp_keepalive_time
# Turn off tcp_window_scaling
echo 0  >/proc/sys/net/ipv4/tcp_window_scaling
#echo "67108864" > /proc/sys/kernel/shmmax
# Turn off the tcp_sack
echo 0  >/proc/sys/net/ipv4/tcp_sack # This disables RFC2018 TCP Selective Acknowledgements
#Turn off tcp_timestamps
echo 0  >/proc/sys/net/ipv4/tcp_timestamps # This disables RFC1323 TCP timestamps
echo 5 > /proc/sys/kernel/panic # reboot 5 minutes later then kernel panic

Tags: Linux //