Memory Utilization
It is often the case that there is a minimum amount of total memory required to run a software application. Below is an example of an analyzer that will parse the /proc/meminfo file and display the available and total memory of the host.
analyze:
v1:
- name: memory.usage
labels:
iconKey: os_memory
desiredPosition: "6"
insight:
primary: '{{repl round .memoryUsagePercent 0 | printf "%.0f"}}%'
detail: '{{repl sub .memoryUsageTotal .memoryUsageAvailable | float64 | humanSize}} memory used of {{repl .memoryUsageTotal | humanSize}}'
severity: warn
registerVariables:
- name: memoryUsageAvailable
memoryUsageAvailable: {}
- name: memoryUsageTotal
memoryUsageTotal: {}
- name: memoryUsagePercent
eval: '{{repl if and .memoryUsageAvailable .memoryUsageTotal}}{{repl divFloat (subFloat .memoryUsageTotal .memoryUsageAvailable) .memoryUsageTotal | mulFloat 100}}{{repl end}}'
evaluateConditions:
- condition:
and:
- not:
empty: {}
variableRef: memoryUsageAvailable
- not:
empty: {}
variableRef: memoryUsageTotal
insightOnFalse:
primary: Unknown
detail: Could not determine memory usage. Ensure your specs include a command os.read-file["/proc/meminfo"].
severity: debug
- condition:
numberCompare:
gt: 90
variableRef: memoryUsagePercent
insightOnFalse:
primary: '{{repl round .memoryUsagePercent 0 | printf "%.0f"}}%'
detail: '{{repl sub .memoryUsageTotal .memoryUsageAvailable | float64 | humanSize}} memory used of {{repl .memoryUsageTotal | humanSize}}'
severity: info