Message Types

MC generates both default notifications and customizable threshold notifications.

Threshold Notifications

MC generates threshold-based notifications when the database exceeds the specified limits on the following thresholds.

  • License Status
    • License Usage
  • System Health
    • Node Health
      • Node CPU
      • Node Memory
      • Node Disk Usage
      • Node Disk I/O
      • Node CPU I/O Wait
      • Node Reboot Rate
      • Node Catalog Memory
      • Node State Change
    • Network Health
      • Network I/O Error
  • System Performance
    • Query
      • Queued Query Number
      • Failed Query Number
      • Spilled Query Number
      • Retried Query Number
      • Query Running Time
    • Resource Pool
      • Queries Reaching the Max Allowed Execution Time
      • Queries With Resource Rejections
      • Ended Query With Queue Time Exceeding Limit
      • Ended Query With Run Time Exceeding Limit

MC provides default settings for these notifications. You can customize threshold notification settings in the Thresholds tab in the database Settings page. Threshold notifications appear in the Message Center. High-priority threshold alerts also appear on the Overview Page. See Customizing Threshold-Based Notifications for how to prioritize alerts.

Default Notifications

By default, MC also generates messages about the database that appear only in the Message Center. You might receive messages about the following database-related conditions:

  • Low disk space
  • Read-only file system
  • Loss of K-safety
  • Current fault tolerance at critical level
  • Too many ROS containers
  • WOS overflow
  • Change in node state
  • Recovery error
  • Recovery failure
  • Recovery lock error
  • Recovery projection retrieval error
  • Refresh error
  • Refresh lock error
  • Workload Analyzer operations
  • Tuple Mover error
  • Timer service task error
  • Last Good Epoch (LGE) lag
  • License size compliance
  • License term compliance