Увеличение лимитов linux и тюнинг ядра для hiload.

Увеличение лимитов linux

nano /etc/security/limits.conf

* - nofile 999999
* soft nofile 500000
* hard nofile 500000
root soft nofile 500000
root hard nofile 500000
root soft nproc unlimited
root hard nproc unlimited

Тюнинг sysctl.conf

nano /etc/sysctl.conf

net.ipv4.tcp_tw_recycle  =  1
net.ipv4.tcp_tw_reuse  =  1
net.ipv4.ip_local_port_range = 10240 65535
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.all.secure_redirects = 0
net.ipv4.conf.all.send_redirects = 0
net.ipv4.tcp_max_orphans = 65536
net.ipv4.tcp_fin_timeout = 10
net.ipv4.tcp_keepalive_time = 1800
net.ipv4.tcp_keepalive_intvl = 15
net.ipv4.tcp_keepalive_probes = 5
net.ipv4.tcp_synack_retries = 1
net.ipv4.tcp_mem = 50576   64768   98152
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216
net.ipv4.tcp_orphan_retries = 0
net.ipv4.tcp_syncookies = 0
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_sack = 1
net.ipv4.tcp_congestion_control = htcp
net.ipv4.tcp_no_metrics_save = 1
net.ipv4.route.flush = 1
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.lo.rp_filter = 1
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.lo.accept_source_route = 0
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_rfc1337 = 1
net.ipv4.ip_forward = 1
net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.icmp_echo_ignore_all = 0
net.ipv4.icmp_ignore_bogus_error_responses = 1
net.ipv4.tcp_adv_win_scale = 2
net.ipv4.tcp_moderate_rcvbuf = 1
net.ipv4.tcp_rmem = 4096 262144 4194304
net.ipv4.tcp_wmem = 4096 262144 4194304
net.ipv4.tcp_keepalive_time = 900
net.ipv4.tcp_keepalive_intvl = 900
net.ipv4.tcp_keepalive_probes = 9
net.ipv4.tcp_max_syn_backlog = 65536
net.core.somaxconn = 65535
net.core.rmem_default = 16777216
net.core.wmem_default = 65536
net.core.rmem_max = 67108864
net.core.wmem_max = 16777216
net.core.wmem_default = 262144
net.core.wmem_max = 4194304
net.core.netdev_max_backlog = 100000
fs.file-max=99999999
fs.inotify.max_user_watches = 16777216
kernel.sem = 350 358400 64 1024
#so_rcvbuf='16777216', so_rcvbuf_set='8388608'