How to get the CPU, memory and disk usage of a server using the psutil module?

psutil is a cross-platform Python library that allows you to obtain information about system processes and system resource usage. It supports operating systems such as Windows, Linux, OS , disk usage and other information.

• Get the process list, process status, process CPU usage, process memory usage, process IO information, etc.

• Kill the process, send a signal to the process, suspend the process, resume the process and other operations.

• Using psutil, you can easily monitor the running status of the system, diagnose problems and optimize performance. Here is a simple example demonstrating how to use psutil to get system CPU usage and memory usage:

  import psutil
  
  # 获取磁盘使用率(windows),linux服务器可以获取根目录/下的磁盘使用率 disk_usage_C = psutil.disk_usage('/')
  #disk_usage()方法可以获取指定路径的磁盘使用情况，返回一个namedtuple对象，包含total、used、free、percent四个属性，分别表示总容量、已用容量、可用容量和使用率。
  
  disk_usage_C = psutil.disk_usage('C:')
  print("C磁盘总体情况: ","总容量:",round(disk_usage_C.total/1073741824,2),"G"," 磁盘使用率:",disk_usage_C.percent, "%",sep='')
  # sep='' 去除print()内空格,round(数值,2)：保留两位小数 ,1G等于1,073,741,824byte
  
  disk_usage_D = psutil.disk_usage('D:')
  print("D磁盘使用率：","总容量:",round(disk_usage_D.total/1073741824,2),"G"," 磁盘使用率:",disk_usage_D.percent, "%",sep='')
  
  disk_usage_E = psutil.disk_usage('E:')
  print("E磁盘使用率：","总容量:",round(disk_usage_E.total/1099511627776,1),"T"," 磁盘使用率:",disk_usage_E.percent, "%",sep='')
  
  # 获取内存使用率
  #virtual_memory()方法可以获取系统内存使用情况，返回一个namedtuple对象，包含total、available、percent、used、free五个属性，分别表示总内存、可用内存、使用率、已用内存和可用内存。
  mem = psutil.virtual_memory()
  print("内存总量: ",round(mem.total/1073741824,2),"内存使用率：", mem.percent, "%")
  
  # 获取CPU使用率
  #cpu_percent()方法可以获取CPU使用率，可以指定采样间隔（默认为1秒），返回一个浮点数，表示CPU使用率
  cpu_percent = psutil.cpu_percent(interval=1)
  print("cpu核数: ",psutil.cpu_count(),"CPU使用率：", cpu_percent, "%")

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