SAGE2: PerformanceManager

Adds data for a display client.

• idx <>

  The client ID

• data <>

  The data

Gets current CPU load and adds it to a list collected over time

• also computes moving averages of 1 minute and a longer duration (5 minutes)

• data <Object>
  • CPU load data

Gets current server process load and adds it to a list collected over time also computes moving averages of 1 minute and a longer duration (5 minutes)

• data <Object>
  • memory usage data

Calls all metric collection functions to gather data

Gets current Server process load and adds it to a list collected over time also computes moving averages of 1 minute and a longer duration (5 minutes)

• data <Object>
  • processes load data list

Gets current server traffic and adds it to a list collected over time also computes moving averages of 1 minute and a longer duration (5 minutes)

Gets current system traffic and adds it to a list collected over time also computes moving averages of 1 minute and a longer duration (5 minutes)

Computes size of the data being transferred and received through Websockets

• wsio <Object>
  • Websocket object that is responsible to client-server communication
• data <Object>
  • Data being sent or received through sockets
• outBound <Boolean>
  • Flag indicates whether data is outgoing or incoming

Computes moving averages (1 minute and a longer duration)

• metric <String>
  • metric for which averages are to be computed
• oneMinute <Object>
  • placeholder object for one minute average
• entireDuration <Object>
  • placeholder object for longer duration average

Helper function to format memory usage info in a string

• used <Number>
  • amount of memory used
• free <Number>
  • amount of memory free
• short <Boolean>
  • flag to request a short version of the string

Helper function to convert a number to shorter format with appropriate suffix determined (K for Kilo and so on)

• number <Number>
  • large number
• giga <Boolean>
  • using 1000 or 1024

Helper function to get a percentage value

• val <Number>
  • one part(of a total) for which percentage is to be computed
• remaining <Number>
  • remaining part (of the total)

Retrieves the network traffic data and resets the place holder

Prints different performance metrics to the console

Print a summary of the hardware that the server is running on

Removes data of a closed display client.

• idx <>

  The client ID

Saves metric data into current value placeholder and history list

• metric <String>
  • metric for which data is being saved
• data <Object>
  • current metric values obtained

Sets sampling interval to 1, 2 or 5 seconds and restarts the sampling loop values 'often|slow|normal', every other value defaults to 'normal'

• interval <String>
  • Interval specified as a user friendly string

Send a new monitoring client all the specifics

• wsio <Object>

  client's websocket

Wraps the WebsocketIO emit and on functions to append size computation of the data

• being transferred

• WebsocketIO <Object>
  • Websocket object that is responsible to client-server communication