[development of large e-commerce projects] performance pressure test - Optimization - impact of middleware on performance -40

One ： test nginx Impact on performance

1. open jmeter To test

• Change the number of threads to 50, And tick forever , Keep it testing , Unless it's stopped manually

2. to nginx Send a request

For the server 80 Port send request , And add the following summary figure

• Use docker stats see docker Container usage
  
  Conclusion ：nginx It needs to be forwarded frequently to other services , Therefore, it consumes many threads , Small memory ,cpu Large space

Two ： Monitoring indicators

1、 Middleware metrics

• The number of threads currently running cannot exceed the set maximum . In general, when the system performance is good , Line Minimum number of passes setting 50 And maximum settings 200 More appropriate .
• Currently running JDBC The number of connections cannot exceed the set maximum . In general, when the system performance is good , JDBC Minimum setting 50 And maximum settings 200 More appropriate .
• ＧＣ Frequency cannot be frequent , especially FULL GC More often , In general, when the system performance is good , JVM The minimum heap size and the maximum heap size are set respectively 1024M More appropriate .

2、 Database metrics

• SQL The less time it takes, the better , In general, microsecond level .
• The higher the hit rate, the better , In general, it can't be lower than 95%.
• The lower the number of lock waits, the better , The shorter the waiting time, the better .

3、 The joint test

• The more middleware , The greater the performance loss , Most of it is lost in network interaction ;
• Business ：
  Db（MySQL Optimize ）
  The rendering speed of the template （ cache ）
  Static resources

3、 ... and ： Optimize throughput

1.nginx To achieve dynamic and static separation

1） In the future, all static resources will be placed in nginx Inside
2） The rules ：/static/*** All requests are made by nginx Go straight back to
3） Moving static resources （ Transfer static resources directly to the server ）

• Enter into HTML Under the path cd /mydata/nginx/html
• stay HTML Under the new static mkdir static
• Enter into static Folder , And will product Static resources for index Copy in （ Delete the static resources of this project ）
• stay img,src,herf Add to label /static/ route
  

2. Modify the server nginx Configuration of

1） Enter into cd /mydata/nginx/conf/conf.d Under the path
2） modify gulimail.conf file vi gulimail.conf

     location /static/ {
    
      root  /usr/share/nginx/html;
    }