Data collection

Performance test data collection ：

CPU、memory data ：

Use Linux Self contained top Command collection , The detailed usage is as follows

Every time 5 Refresh every second , to update 2 Time ：top –d 5 -n 2 –b > toplog.txt

 top -b > $(date -d "today" +"%Y%m%d_%H%M%S").txt

 

View the network card utilization , Use nicstat Tools to collect data ,nicstat Tools are not Linux Bring their own , Independent installation required .

The installation method is as follows: ：https://blog.csdn.net/lxw198902165221/article/details/100540005

The commands are as follows

nicstat.sh -i eth0 1

 

nmon Tools ,nmon Can collect cpu、 disk IO、memory Wait for multiple data ,nmon It also needs to be installed separately

nmon After installation , Directly in Linux perform nmon, You can see nmon Information about , Here's the picture

  The commands are as follows ,  -f Indicates that there is time in the generated data file name ;  -s 10 each 10 Data is collected every second ;-c 6 To collect 6 Time ,10*6=60 second ,

That is, a total of one minute of data was collected

nmon -f -s 10 -c 6 collecting data , After collection, a... Is generated in the current directory nmon File format , Here's the picture

  The collected data is used nmon analyser v33g.xls Go open it , You can generate the graphic file of each data

 

The opened file is shown in the following figure

 

 

GC data ： adopt JDK Built-in tools jstat collect ,

jstat Detailed usage reference ：

http://blog.csdn.net/zhaozheng7758/article/details/8623549

GC For a detailed explanation of the collected data, refer to ：

http://www.cnblogs.com/qmfsun/p/5601734.html

Simple usage is as follows ： Every time 1S The process number displayed once is 1655 Of GC situation , A total of 5 Time , If the number of times is not specified, continue to collect

jstat -gcutil 1655  1s 5

 

Analyze memory usage

Generate heap dump Method of file ： Use jdk Of jmap command , In operation JVM Generate Dump file , The order is as follows ：

jmap  -dump:format=b,file=/path/heap.bin process ID

 

Use eclipse Plug in for MAT Open the previous binary file ,

MAT The detailed installation and use methods are as follows

http://lxw198902165221.blog.163.com/blog/static/258950022201711623830721

The detailed analysis method of the file content after opening is as follows ：

http://www.cnblogs.com/AloneSword/p/3821569.html

 

Javacore Information collection and analysis

Use kill -3 pid, Can actively generate Javacore Log files

Use IBM Thread and Monitor Dump Analyzer for Java Analyze

Download the corresponding jar file , Directly in jar Execute the following command in the directory where the file is located to start the tool

java -jar jca456.jar

The interface after startup is shown in the following figure

Open with this tool Javacore The analyzed files , The effect is shown below

 

Right click and select the corresponding file list to view the corresponding details

 

 

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