System(paste("sudo netstat -p | grep", PID, "> netstat.log2")) The idea is: make a R script to run above shell commands repeatedly, read the outputs of each command into R, extract the information we need and write them into a. The database feature specifically collects metrics around the database and concisely visualizes only the relevant inisghts you need to understand how your database performs in relation to your app. Now, we have got all information we need manually, and for sure we need them be generated automatically. Scout's database query monitoring feature helps you identify slow and repeatedly expensive database queries within your Ruby application. This command lists all directories (a shiny app is a directory) related with PID 27180, we can easily recognize which line contains the shiny app’s name. Now, we have known the CPU/Memory performance and connections number for each shiny app, however, we still don’t know the name of each shiny app, which can be get using command lsof: We can see, there are 6 connections ESTABLISHED. The above command lists all connections to shiny app with PID 27180. Note, this command need the user log as an administer of the computer. It can list all connections to a shiny app by specifing its Process ID (PID) using command: Netstat is a command-line tool that displays all network connections. The PID should be paid more attention: each shiny app will get a PID, once a shiny app was launched, its PID will not change no matter how many users are using it. The above command lists CPU/Memory performance for all shiny apps, e.g. Using command top, we can get the Process ID (PID), CPU/Memory usage for each shiny app. process-monitor sys-admin linux-admin linux-tools process monitor. God aims to be the simplest, most powerful monitoring application available. Keeping your server processes and tasks running should be a simple part of your deployment process. There are many shell commands for monitoring Linux performance, here I use command top, netstat and lsof for getting CPU/Memory usage, connection number (user number) and the name of each app, respectively. God is an easy to configure, easy to extend monitoring framework written in Ruby. What we want to know is: the CPU/Memory performance and user number for each app. If you are sure the Ruby gem is correctly installed, please refer to the more detailed Troubleshooting documentation for the Instana. To activate the Instana monitoring for Ruby, refer to the Installation section. Suppose that we have three shiny-apps: app#1, app#2 and app#3. The Ruby process does not seem to include the instana Ruby gem, or the Ruby sensor cannot communicate with the Instana host agent. What if we are using the Open source edition? Officially, there is no such a feature, but we can create it ourselves using Linux shell commands. Ruby process monitor professional#If you have deployed your Shiny-app on internet, you may curious about: how many users are using my app? Is the server powerful enough for hosting the app? You can get answers through the Server monitoring feature if you are using the Professional edition of Shiny server.
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