![]() ![]() Other output on the command line following the top command may not be visible on the first page. TIME+ – Represents the total time a task is utilizing since it was startedĬOMMAND – Represents the actual process or command currently running %MEM – a percentage of the available physical memory a process is using On machines with more than CPU, the percentage can be more than 100% %CPU – time the task has been using since the last update. Z – Indicates a dead process (Zombie process) or one that has completed execution.T – Indicates a traced or stopped process.S – Process sleep state waiting for a trigger.D – A process waiting for something to happen.S – Represents the status of a particular process that has the following values:.It also indicates how much of the VIRT is available for sharing in terms of libraries or memory. SHR – This refers to shared memory that a process is assigned. RES – Defines the resident memory capacity. It also describes the virtual size of a process. ![]() VIRT – represents the amount of virtual memory the process is using. There is a relationship between nice value and priority which is PR = 20 + NI The value ranges from -20 as the highest figure, 0 the default, and +19 as the lowest. NI – represents the nice value that matches the user space. PR – Indicates process priority from the Linux Kernel USER – This is the user running the process or use that the process is running under. Every running process on the Linux systems bears a PID Let us analyze some of the columns for better understanding. ![]() Every column above represents different information as the horizontal lines indicate a summary of the different areas running in the system. ![]()
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