Catch small problems before they become outages
Goal
You should be able to demonstrate the result described in the lesson and explain why each step was necessary.
You should be able to demonstrate the result described in the lesson and explain why each step was necessary.
Step-by-step
01
Start with four signals
Watch availability, disk free space, memory pressure, and temperature/load.
02
Set meaningful thresholds
Alert before the disk reaches 100%, not after.
03
Keep monitoring independent when possible
A monitor that dies with the server cannot tell you the server is down.
04
Avoid alert noise
Too many low-value alerts train you to ignore the important one.
05
Keep a status history
Trend data helps distinguish a sudden fault from gradual resource growth.
Verify before moving on
You should be able to demonstrate the result described in the lesson and explain why each step was necessary.
You should be able to demonstrate the result described in the lesson and explain why each step was necessary.
Troubleshooting
If a command or screen differs from the lesson, stop and verify the version you are using before forcing a change.
What you learned
You now understand the purpose of this part of the system and have a concrete result you can verify before continuing to the next lesson.