kernel 2.4.xx のカーネルをチューニング
http://www.nxhack.tarumi.kobe.jp/linux_kernel_tuning.html を参考に /etc/sysctl.conf を追加
#/etc/sysctl.conf を以下の内容を追加
fs.file-max=32768
kernel.random.poolsize=2048
kernel.sem=250 32000 128 1024
kernel.msgmni=256
#kernel.shmmax=2147483648
# defualt 30 500 0 0 500 3000 60 20 0
vm.bdflush=30 500 0 0 60 300 60 0 0
net.ipv4.icmp_echo_ignore_broadcasts=1
net.ipv4.conf.all.accept_source_route=0
net.ipv4.conf.all.accept_redirects=0
net.ipv4.icmp_ignore_bogus_error_responses=1
net.core.rmem_max=1048560
net.core.wmem_max=1048560
net.core.rmem_default=65535
net.core.wmem_default=65535
net.core.optmem_max=20480
net.core.hot_list_length=8192
#net.core.netdev_max_backlog=300
net.ipv4.ip_local_port_range=1024 49151
net.ipv4.tcp_rmem=4096 87380 1048560
net.ipv4.tcp_wmem=4096 16384 1048560
net.ipv4.tcp_mem=1048560 1048560 1048560
#net.ipv4.tcp_syncookies=1
net.ipv4.tcp_max_syn_backlog=2048
net.ipv4.tcp_max_orphans=32768
net.ipv4.tcp_retries1=3
#net.ipv4.tcp_retries2=7
net.ipv4.tcp_timestamps=1
net.ipv4.tcp_window_scaling=1
net.ipv4.tcp_sack=1
net.ipv4.tcp_dsack=0
net.ipv4.tcp_fack=0
net.ipv4.tcp_ecn=0
net.ipv4.tcp_bic=0
net.ipv4.tcp_fin_timeout=30
net.ipv4.tcp_keepalive_time=300