Top & Htop Metric Cheatsheet

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Top & Htop Metric Cheatsheet - 100% Client-Side Developer Tool

VIRTVirtual Memory Size

Total memory the process can access, including mapped files, shared libraries, and swapped memory.

Normal to be very large (e.g. JVM/Go). Does not mean actual RAM consumption.
RESResident Memory Size

The non-swapped physical memory (RAM) a process is actively consuming.

Key indicator of actual RAM usage. High RES indicates heavy process footprint.
SHRShared Memory Size

Memory shared with other processes (e.g. standard C libraries libc.so).

Actual unique memory consumed is approximately (RES - SHR).
Load Average (1, 5, 15m)System Load Average

Average number of processes in runnable (R) or uninterruptible disk sleep (D) state.

If Load Average > CPU Core Count, tasks are queuing for CPU or waiting on slow Disk I/O.
State (D)Uninterruptible Sleep

Process waiting for hardware I/O (disk, NFS lock). Cannot be killed even by SIGKILL (9).

High D state processes indicate disk bottlenecks, hardware degradation, or frozen NFS mounts.
State (Z)Zombie Process

Child process terminated but parent has not read exit status via wait().

Consumes only a PID entry. Fix by signaling or restarting the parent process.

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How to use Top & Htop Metric Cheatsheet

  1. 1Configure your parameters in the input form.
  2. 2Inspect the instant client-side calculated results.
  3. 3Copy the generated command or config snippet.

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