新开ubuntu的必要优化

Myth丶恋晨 2022-06-10 11:12 184阅读 0赞

**博主不是专业的运维人员， 有时候新开业务服务器到生产环境忘记配置ubuntu的配置时候，就发生各种奇怪的悲剧比如：  
redis出现大量TIMEWAIT状态，并且服务器不会收，原因是tcp\_tw\_recycle配置为0等等。为避免遗忘记录下新开的服务器必要的操作：  
  
ubuntu网络优化**

**vi /etc/sysctl.conf**

**net.ipv4.tcp\_max\_tw\_buckets = 5000  
net.ipv4.tcp\_syncookies = 1  
net.ipv4.tcp\_synack\_retries = 2  
net.ipv6.conf.all.disable\_ipv6 = 1  
net.ipv6.conf.default.disable\_ipv6 = 1  
net.ipv6.conf.lo.disable\_ipv6 = 1**

**net.ipv4.tcp\_orphan\_retries = 3  
net.ipv4.tcp\_syncookies = 1  
net.ipv4.tcp\_tw\_reuse = 1  
net.ipv4.tcp\_tw\_recycle = 1  
net.ipv4.tcp\_fin\_timeout = 3  
net.ipv4.tcp\_window\_scaling = 1  
net.ipv4.tcp\_sack = 1  
net.ipv4.tcp\_keepalive\_time = 30  
net.ipv4.ip\_local\_port\_range = 2000 65000  
net.ipv4.tcp\_max\_tw\_buckets = 6000  
net.core.somaxconn = 65535  
net.core.netdev\_max\_backlog = 262144  
net.ipv4.tcp\_max\_orphans = 3276800  
net.ipv4.tcp\_max\_syn\_backlog = 262144  
net.core.somaxconn = 2048**

**net.ipv4.tcp\_mem = 94500000 915000000 927000000**

**-------------------------------**

**另一个优化：**

**net.core.rmem\_default = 262144**

**net.core.rmem\_max = 16777216**

**net.core.wmem\_default = 262144**

**net.core.wmem\_max = 16777216**

**net.core.somaxconn = 262144**

**net.core.netdev\_max\_backlog = 262144**

**net.ipv4.tcp\_max\_orphans = 262144**

**net.ipv4.tcp\_max\_syn\_backlog = 262144**

**net.ipv4.tcp\_max\_tw\_buckets = 10000**