As a DevOps engineer, you should be familiar with several metrics to effectively monitor and maintain the performance and reliability of a system.

Here are the 10 most important metrics you must know:

1. Availability:

This is a measure of the proportion of time that a system is operational, taking into account both the MTBF and MTTR.

2. Mean Time Between Failures (MTBF):

This is a measure of the average time that a system operates without failing.

3. Mean Time To Repair (MTTR):

This is a measure of the average time it takes to repair a system after it has failed.

4. Error rate:

This is a measure of the number of errors that occur in a system, typically expressed as a percentage of total requests.

5. Throughput:

This is a measure of the amount of work that a system can handle, typically expressed in requests per second.

6. Latency:

This is a measure of the time it takes for a request to be processed by a system.

7. CPU utilization:

This is a measure of the amount of CPU resources that are being used by a system.

8. Memory usage:

This is a measure of the amount of memory that is being used by a system.

9. Disk I/O:

This is a measure of the amount of data being read from and written to disk by a system.

10. Network I/O:

This is a measure of the amount of data being transferred over a network by a system.

Choosing which key metrics to monitor is dependent on your company's specific challenges and needs. I hope this thread has been helpful in identifying the essential metrics.

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