To enable in-depth metric monitoring, the agent requires user credentials to access monitoring information. You can configure it in the agent here <agent_install_dir>/etc/instana/configuration.yml:

  user: ''
  password: ''

Metrics collection

Configuration data

  • Version
  • Port
  • Limit
  • Max connections
  • Started at

Performance metrics

  • Commands
  • Reads/Writes
  • Get Hits/Misses
  • Delete Hits/Misses
  • Flush Command
  • Evictions
  • Used Bytes
  • Connections

Health Signatures

For each sensor, there is a curated knowledgebase of health signatures that are evaluated continuously against the incoming metrics and are used to raise issues or incidents depending on user impact.

Built-in events trigger issues or incidents based on failing health signatures on entities, and custom events trigger issues or incidents based on the thresholds of an individual metric of any given entity.

For information about built-events for the Memcached sensor, see the Built-in events reference.