Linux内核优化

发个一直用的内核参数：

<code>net.ipv4.ip_forward = 1</code>

<code>net.ipv4.conf.default.rp_filter = 0</code>

<code>net.ipv4.conf.default.accept_source_route = 0</code>

<code>kernel.sysrq = 0</code>

<code>kernel.core_uses_pid = 1</code>

<code>net.ipv4.tcp_syncookies = 1</code>

<code>kernel.msgmnb = 65536</code>

<code>kernel.msgmax = 65536</code>

<code>kernel.shmmax = 68719476736</code>

<code>kernel.shmall = 4294967296</code>

<code>net.ipv4.tcp_max_tw_buckets = 6000</code>

<code>net.ipv4.tcp_sack = 1</code>

<code>net.ipv4.tcp_window_scaling = 1</code>

<code>net.ipv4.tcp_rmem = 4096        87380    4194304</code>

<code>net.ipv4.tcp_wmem = 4096        16384    4194304</code>

<code>net.core.wmem_default = 8388608</code>

<code>net.core.rmem_default = 8388608</code>

<code>net.core.rmem_max = 16777216</code>

<code>net.core.wmem_max = 16777216</code>

<code>net.core.netdev_max_backlog = 262144</code>

<code>net.core.somaxconn = 262144</code>

<code>net.ipv4.tcp_max_orphans = 3276800</code>

<code>net.ipv4.tcp_max_syn_backlog = 262144</code>

<code>net.ipv4.tcp_timestamps = 0</code>

<code>net.ipv4.tcp_synack_retries = 1</code>

<code>net.ipv4.tcp_syn_retries = 1</code>

<code>net.ipv4.tcp_tw_recycle = 1</code>

<code>net.ipv4.tcp_tw_reuse = 1</code>

<code>net.ipv4.tcp_mem = 94500000 915000000 927000000</code>

<code>net.ipv4.tcp_fin_timeout = 1</code>

<code>net.ipv4.tcp_keepalive_time = 30</code>

<code>net.ipv4.ip_local_port_range = 1024    65000</code>

本文转自 王家东哥 51CTO博客，原文链接:http://blog.51cto.com/xiaodongge/1845421