out of socket memory

cu_Cbear

out of socket memory

通过此文章，我进行了相关调整，调整过后，就再未出现些相关提示，中文是我自己对照的翻译，水平有限！主要是调整TCP的缓冲区及对TCP连接状态进行调整及TCP状态队列
后两个之前有调整，这次只高速了TCP的缓冲区

Increasing the TCP send and receive buffers will increase the performance a lot if (and only if) you have a lot of large files to send.

增加TCP 发送和接收缓冲区对性能有很大的提高，在你有大文件发送的情况下

net.ipv4.tcp_wmem = 4096 65536 524288
net.core.wmem_max = 1048576
If you have a lot of large file uploads, increasing the receive buffers will help.

如果你有大文件上传，增大接收缓冲区对给你带来帮助

1. 01.net.ipv4.tcp_rmem = 4096 87380 524288
   
2. 
   
3. 02.net.core.rmem_max = 1048576
   
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1. 
   
2. # These ensure that TIME_WAIT ports either get reused or closed fast.
   
3. 
   
4. 以下参数确保TIME_WAIT 快速关闭
   
5. 
   
6. 01.net.ipv4.tcp_fin_timeout = 1   ##打开fin_wait 快速关闭参数
   
7. 
   
8. 02.net.ipv4.tcp_tw_recycle = 1     ##快速回收fin_wait参数
   
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设置内核TCP的相关参数
# TCP memory

1. 01.net.core.rmem_max = 16777216  ##内核最大接收缓冲  16M
   
2. 
   
3. 02.net.core.rmem_default = 16777216  ##内核?认接收缓冲 16M
   
4. 
   
5. 03.net.core.netdev_max_backlog = 262144   ##2M
   
6. 
   
7. 04.net.core.somaxconn = 262144    ##2M
   
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1. 01.net.ipv4.tcp_syncookies = 1   ##打开SYN_COOKIE
   
2. 
   
3. 02.net.ipv4.tcp_max_orphans = 262144  ##2M
   
4. 
   
5. 03.net.ipv4.tcp_max_syn_backlog = 262144  ##SYN 队列大小  2M
   
6. 
   
7. 04.net.ipv4.tcp_synack_retries = 2  ##SYN_ACK重试次数  2秒
   
8. 
   
9. 05.net.ipv4.tcp_syn_retries = 2   ## SYN 重试次数   2秒
   
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# you shouldn’t be using conntrack on a heavily loaded server anyway, but these are
# suitably high for our uses, insuring that if conntrack gets turned on, the box doesn’t die

如果用到IPTABLES 同样要增长ip_conntrack 的大小，这个是iptables 所管理的状态数目

1. 01.net.ipv4.ip_conntrack_max = 1048576
   
2. 
   
3. 02.net.ipv4.netfilter.ip_conntrack_max = 1048576
   
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蓝猫淘气啦啦

谢谢分享