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测试机器为腾讯云服务器1核1G内存，swap分区2G，停用除SSH外的所有服务，仅保留nginx，优化思路主要包括两个层面：系统层面+nginx层面。一、系统层面1、调整同时打开文件数量<pre style="margin-top: 0px; margin-bottom: 0px; padding: 0px; white-space: pre-wrap; overflow-wrap: break-word; font-family: &quot;Courier New&quot; !important;">ulimit&nbsp;-n&nbsp;20480</pre>2、TCP最大连接数（somaxconn）<pre style="margin-top: 0px; margin-bottom: 0px; padding: 0px; white-space: pre-wrap; overflow-wrap: break-word; font-family: &quot;Courier New&quot; !important;">echo&nbsp;10000&nbsp;&gt;&nbsp;/proc/sys/net/core/somaxconn</pre>3、TCP连接立即回收、回用（recycle、reuse）<pre style="margin-top: 0px; margin-bottom: 0px; padding: 0px; white-space: pre-wrap; overflow-wrap: break-word; font-family: &quot;Courier New&quot; !important;">echo&nbsp;1&nbsp;&gt;&nbsp;/proc/sys/net/ipv4/tcp_tw_reuseecho&nbsp;1&nbsp;&gt;&nbsp;/proc/sys/net/ipv4/tcp_tw_recycle</pre>4、不做TCP洪水抵御<pre style="margin-top: 0px; margin-bottom: 0px; padding: 0px; white-space: pre-wrap; overflow-wrap: break-word; font-family: &quot;Courier New&quot; !important;">echo&nbsp;0&nbsp;&gt;&nbsp;/proc/sys/net/ipv4/tcp_syncookies</pre>也可以直接使用优化后的配置，在/etc/sysctl.conf中加入：<a title="复制代码" style="margin: 0px; padding: 0px; text-decoration-line: underline; border: none !important;"><img src="/ueditor/php/upload/image/20191201/1575198690296574.gif" alt="复制代码" style="margin: 0px; padding: 0px; max-width: 900px; height: auto; border: none !important;"/></a>&nbsp;<pre style="margin-top: 0px; margin-bottom: 0px; padding: 0px; white-space: pre-wrap; overflow-wrap: break-word; font-family: &quot;Courier New&quot; !important;">net.core.somaxconn&nbsp;=&nbsp;20480
net.core.rmem_default&nbsp;=&nbsp;262144
net.core.wmem_default&nbsp;=&nbsp;262144
net.core.rmem_max&nbsp;=&nbsp;16777216
net.core.wmem_max&nbsp;=&nbsp;16777216
net.ipv4.tcp_rmem&nbsp;=&nbsp;4096&nbsp;4096&nbsp;16777216
net.ipv4.tcp_wmem&nbsp;=&nbsp;4096&nbsp;4096&nbsp;16777216
net.ipv4.tcp_mem&nbsp;=&nbsp;786432&nbsp;2097152&nbsp;3145728
net.ipv4.tcp_max_syn_backlog&nbsp;=&nbsp;16384
net.core.netdev_max_backlog&nbsp;=&nbsp;20000
net.ipv4.tcp_fin_timeout&nbsp;=&nbsp;15
net.ipv4.tcp_max_syn_backlog&nbsp;=&nbsp;16384
net.ipv4.tcp_tw_reuse&nbsp;=&nbsp;1
net.ipv4.tcp_tw_recycle&nbsp;=&nbsp;1
net.ipv4.tcp_max_orphans&nbsp;=&nbsp;131072
net.ipv4.tcp_syncookies&nbsp;=&nbsp;0</pre>&nbsp;<a title="复制代码" style="margin: 0px; padding: 0px; text-decoration-line: underline; border: none !important;"><img src="/ueditor/php/upload/image/20191201/1575198690296574.gif" alt="复制代码" style="margin: 0px; padding: 0px; max-width: 900px; height: auto; border: none !important;"/></a>使用：sysctl -p 生效<pre style="margin-top: 0px; margin-bottom: 0px; padding: 0px; white-space: pre-wrap; overflow-wrap: break-word; font-family: &quot;Courier New&quot; !important;">sysctl&nbsp;-p</pre>二、nginx层面修改nginx配置文件，nginx.conf增加work_rlimit_nofile和worker_connections数量，并禁用keepalive_timeout。<a title="复制代码" style="margin: 0px; padding: 0px; text-decoration-line: underline; border: none !important;"><img src="/ueditor/php/upload/image/20191201/1575198690296574.gif" alt="复制代码" style="margin: 0px; padding: 0px; max-width: 900px; height: auto; border: none !important;"/></a>&nbsp;<pre style="margin-top: 0px; margin-bottom: 0px; padding: 0px; white-space: pre-wrap; overflow-wrap: break-word; font-family: &quot;Courier New&quot; !important;">worker_processes&nbsp;&nbsp;1;
worker_rlimit_nofile&nbsp;20000;

events&nbsp;{
&nbsp;&nbsp;&nbsp;&nbsp;use&nbsp;epoll;
&nbsp;&nbsp;&nbsp;&nbsp;worker_connections&nbsp;20000;
&nbsp;&nbsp;&nbsp;&nbsp;multi_accept&nbsp;on;
}

http&nbsp;{
　　keepalive_timeout&nbsp;0;
}</pre>&nbsp;<a title="复制代码" style="margin: 0px; padding: 0px; text-decoration-line: underline; border: none !important;"><img src="/ueditor/php/upload/image/20191201/1575198690296574.gif" alt="复制代码" style="margin: 0px; padding: 0px; max-width: 900px; height: auto; border: none !important;"/></a>&nbsp;<hr style="margin: 0px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 14px; white-space: normal;"/>&nbsp;重启nginx<pre style="margin-top: 0px; margin-bottom: 0px; padding: 0px; white-space: pre-wrap; overflow-wrap: break-word; font-family: &quot;Courier New&quot; !important;">/usr/local/nginx/sbin/nginx&nbsp;-s&nbsp;reload</pre>使用ab压力测试<pre style="margin-top: 0px; margin-bottom: 0px; padding: 0px; white-space: pre-wrap; overflow-wrap: break-word; font-family: &quot;Courier New&quot; !important;">ab&nbsp;-c&nbsp;10000&nbsp;-n&nbsp;150000&nbsp;http://127.0.0.1/index.html</pre><hr style="margin: 0px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 14px; white-space: normal;"/>测试结果：<a title="复制代码" style="margin: 0px; padding: 0px; text-decoration-line: underline; border: none !important;"><img src="/ueditor/php/upload/image/20191201/1575198690296574.gif" alt="复制代码" style="margin: 0px; padding: 0px; max-width: 900px; height: auto; border: none !important;"/></a>&nbsp;<pre style="margin-top: 0px; margin-bottom: 0px; padding: 0px; white-space: pre-wrap; overflow-wrap: break-word; font-family: &quot;Courier New&quot; !important;">This&nbsp;is&nbsp;ApacheBench,&nbsp;Version&nbsp;2.3&nbsp;&lt;$Revision:&nbsp;655654&nbsp;$&gt;
Copyright&nbsp;1996&nbsp;Adam&nbsp;Twiss,&nbsp;Zeus&nbsp;Technology&nbsp;Ltd,&nbsp;http://www.zeustech.net/
Licensed&nbsp;to&nbsp;The&nbsp;Apache&nbsp;Software&nbsp;Foundation,&nbsp;http://www.apache.org/

Benchmarking&nbsp;127.0.0.1&nbsp;(be&nbsp;patient)
Completed&nbsp;15000&nbsp;requests
Completed&nbsp;30000&nbsp;requests
Completed&nbsp;45000&nbsp;requests
Completed&nbsp;60000&nbsp;requests
Completed&nbsp;75000&nbsp;requests
Completed&nbsp;90000&nbsp;requests
Completed&nbsp;105000&nbsp;requests
Completed&nbsp;120000&nbsp;requests
Completed&nbsp;135000&nbsp;requests
Completed&nbsp;150000&nbsp;requests
Finished&nbsp;150000&nbsp;requests

Server&nbsp;Software:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;nginx/1.8.0
Server&nbsp;Hostname:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;127.0.0.1
Server&nbsp;Port:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;80

Document&nbsp;Path:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/index.html
Document&nbsp;Length:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;612&nbsp;bytes

Concurrency&nbsp;Level:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;10000
Time&nbsp;taken&nbsp;for&nbsp;tests:&nbsp;&nbsp;&nbsp;19.185&nbsp;seconds
Complete&nbsp;requests:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;150000
Failed&nbsp;requests:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0
Write&nbsp;errors:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0
Total&nbsp;transferred:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;131180388&nbsp;bytes
HTML&nbsp;transferred:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;95121324&nbsp;bytes
Requests&nbsp;per&nbsp;second:&nbsp;&nbsp;&nbsp;&nbsp;7818.53&nbsp;[#/sec]&nbsp;(mean)
Time&nbsp;per&nbsp;request:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1279.013&nbsp;[ms]&nbsp;(mean)
Time&nbsp;per&nbsp;request:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0.128&nbsp;[ms]&nbsp;(mean,&nbsp;across&nbsp;all&nbsp;concurrent&nbsp;requests)
Transfer&nbsp;rate:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6677.33&nbsp;[Kbytes/sec]&nbsp;received

Connection&nbsp;Times&nbsp;(ms)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;min&nbsp;&nbsp;mean[+/-sd]&nbsp;median&nbsp;&nbsp;&nbsp;max
Connect:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;650&nbsp;547.9&nbsp;&nbsp;&nbsp;&nbsp;522&nbsp;&nbsp;&nbsp;&nbsp;7427
Processing:&nbsp;&nbsp;&nbsp;212&nbsp;&nbsp;519&nbsp;157.4&nbsp;&nbsp;&nbsp;&nbsp;496&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;958
Waiting:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;404&nbsp;139.7&nbsp;&nbsp;&nbsp;&nbsp;380&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;845
Total:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;259&nbsp;1168&nbsp;572.1&nbsp;&nbsp;&nbsp;1066&nbsp;&nbsp;&nbsp;&nbsp;7961

Percentage&nbsp;of&nbsp;the&nbsp;requests&nbsp;served&nbsp;within&nbsp;a&nbsp;certain&nbsp;time&nbsp;(ms)
&nbsp;&nbsp;50%&nbsp;&nbsp;&nbsp;1066
&nbsp;&nbsp;66%&nbsp;&nbsp;&nbsp;1236
&nbsp;&nbsp;75%&nbsp;&nbsp;&nbsp;1295
&nbsp;&nbsp;80%&nbsp;&nbsp;&nbsp;1320
&nbsp;&nbsp;90%&nbsp;&nbsp;&nbsp;1855
&nbsp;&nbsp;95%&nbsp;&nbsp;&nbsp;2079
&nbsp;&nbsp;98%&nbsp;&nbsp;&nbsp;2264
&nbsp;&nbsp;99%&nbsp;&nbsp;&nbsp;2318
&nbsp;100%&nbsp;&nbsp;&nbsp;7961&nbsp;(longest&nbsp;request)</pre><a title="复制代码" style="margin: 0px; padding: 0px; text-decoration-line: underline; border: none !important;"><img src="/ueditor/php/upload/image/20191201/1575198690296574.gif" alt="复制代码" style="margin: 0px; padding: 0px; max-width: 900px; height: auto; border: none !important;"/></a><a title="复制代码" style="margin: 0px; padding: 0px; text-decoration-line: underline; border: none !important;"> </a>