For example, you can use this information to check which ports the Data Virtuality Server is listening on and whether there are any open connections to remote hosts with the command line tool netstat. This is also very useful when you want to have the process id (PID) used for the Data Virtuality Server. If you want some information but do not care about visualization in the form of small graphs, you can modify the Task Manager slightly to give more details about the running processes. Not only can the CPU and RAM usage be audited, but the network rate and disc performance are also displayable. Go to the Resource Monitor to have a graphical visualization of different performance counters. The Task Manager can be used to check which processes are running and what their resource consumption is. On Windows, you can use the standard tools that are provided by the system. netstat (use netstat -aon | grep %PID% to get all network data from a specific process).All the tools are command-line and can be started from a terminal session. This is an excellent way of real-time auditing the server and checking for anomalies. The last tool, tail, opens a file and will automatically refresh and show you the last lines of the file you are watching. After you noted the process id (PID) of the Data Virtuality Server process, you can execute netstat -aon | grep %PID% and receive all bindings that the server uses for connections as well as the listening port and IP. The netstat command-line tool is useful to see your system's TCP and UDP connections, and you can combine it with grep to filter the output table. Maybe the htop tool is not yet installed (top most certainly is), but you can quickly get it via apt, yum, or the package manager you use on the system. The tools top and htop allow you to follow the resource consumption of the programs and services running on the machine. There are four tools which help monitor and trace the server process: top, htop, netstat and tail. Linux offers some basic and useful tools out of the box. We will give a brief description of the tools usable if you want to monitor the Java process for performance counters or network communication. Additionally, you can monitor the Java process behind the server. Use tail (or Tail for Windows if you are not using a Linux system) to read the activity stream from the command line. You can see the server log in real-time as described in the Logging section.

Htop network monitor