Prometheus metrics

Virtuozzo Hybrid Infrastructure uses three types of metrics in Prometheus:

• Counter metrics (usually, with the "_total" suffix) are cumulative and increase over time
• Gauge metrics show fluctuating values
• Histogram metrics are cumulative and store measurements in different buckets depending on the measurement value:
  • Metrics with the "_bucket" suffix show the current value per bucket
  • Metrics with the "_sum" suffix show the total sum of all values per bucket
  • Metrics with the "_count" suffix show the number of stored measurements per bucket