doc-exports/docs/dds/umn/dds_03_0026.html

DDS Metrics

Cluster

• Table 1 lists the DB instance monitoring metrics.

  Table 1 DB instance monitoring metrics

  Metrics	Unit
  COMMAND Statements per Second	Count/s
  DELETE Statements per Second	Count/s
  INSERT Statements per Second	Count/s
  QUERY Statements per Second	Count/s
  UPDATE Statements per Second	Count/s
  GETMORE Statements per Second	Count/s
  Chunks of Shard 1	Count
  Chunks of Shard 2	Count
  Chunks of Shard 3	Count
  Chunks of Shard 4	Count
  Chunks of Shard 5	Count
  Chunks of Shard 6	Count
  Chunks of Shard 7	Count
  Chunks of Shard 8	Count
  Chunks of Shard 9	Count
  Chunks of Shard 10	Count
  Chunks of Shard 11	Count
  Chunks of Shard 12	Count
  Active Instance Connections	Count
  Chunk Migration Failures in Last 24 hrs	Count

• The monitoring metrics of the primary nodes in the config's and shard's replica sets are as follows:
  • Table 2 lists the ECS monitoring metrics.

  • Table 2 ECS monitoring metrics

    Metrics	Unit
    CPU Usage	Percent
    Memory Usage	Percent
    Network Output Throughput	bytes/s
    Network Input Throughput	bytes/s
    Disk Utilization	Percent
    IOPS	Count/s
    Disk Read Throughput	bytes/s
    Disk Write Throughput	bytes/s
    Average Time per Disk Read	s
    Average Time per Disk Write	s
    Total Disk Size	GB
    Disk Usage	GB

  • Table 3 lists database metrics.

    Table 3 Database metrics

    Metrics	Unit
    COMMAND Statements per Second	Count/s
    DELETE Statements per Second	Count/s
    INSERT Statements per Second	Count/s
    QUERY Statements per Second	Count/s
    UPDATE Statements per Second	Count/s
    GETMORE Statements per Second	Count/s
    Active Connections	Count
    Resident Memory	MB
    Virtual Memory	MB
    Regular Asserts per Second	Count/s
    Warning Asserts per Second	Count/s
    Message Asserts per Second	Count/s
    User Asserts per Second	Count/s
    Number of Operations Queued Waiting for the Lock	Count
    Operations Queued Waiting for a Read Lock	Count
    Operations Queued Waiting for a Write Lock	Count
    Page Faults	Count
    Slow Queries	Count
    Maintained Cursors	Count
    Timeout Cursors	Count
    Bytes in WiredTiger Cache	MB
    Tracked Dirty Bytes in WiredTiger Cache	MB
    Bytes Written Into Cache per Second	bytes/s
    Bytes Written From Cache per Second	bytes/s
    Oplog Window	h
    Oplog Growth Rate	MB/h

• The monitoring metrics of the secondary or hidden nodes in the config's and shard's replica sets are as follows:
  • The ECS monitoring metrics are the same as those of the primary nodes in the config's and shard's replica sets. For details, see Table 2.
  • Table 4 lists database metrics.

    Table 4 Database metrics

    Metrics	Unit
    COMMAND Statements per Second	Count/s
    DELETE Statements per Second	Count/s
    INSERT Statements per Second	Count/s
    QUERY Statements per Second	Count/s
    UPDATE Statements per Second	Count/s
    GETMORE Statements per Second	Count/s
    Active Node Connections	Count
    Resident Memory	MB
    Virtual Memory	MB
    Regular Asserts per Second	Count/s
    Warning Asserts per Second	Count/s
    Message Asserts per Second	Count/s
    User Asserts per Second	Count/s
    Operations Queued Waiting for a Lock	Count
    Operations Queued Waiting for a Read Lock	Count
    Operations Queued Waiting for a Write Lock	Count
    Page Faults	Count
    Slow Queries	Count
    Maintained Cursors	Count
    Timeout Cursors	Count
    Bytes in WiredTiger Cache	MB
    Tracked Dirty Bytes in WiredTiger Cache	MB
    Bytes Written Into Cache per Second	bytes/s
    Bytes Written From Cache per Second	bytes/s
    Replication Headroom	s
    Replication Lag	s
    Replicated COMMAND Statements per Second	Count/s
    Replicated UPDATE Statements per Second	Count/s
    Replicated DELETE Statements per Second	Count/s
    Replicated INSERT Statements per Second	Count/s

• mongos metrics are as follows:
  • Table 5 lists the ECS monitoring metrics.

  • Table 5 ECS monitoring metrics

    Metrics	Unit
    CPU Usage	Percent
    Memory Usage	Percent
    Network Output Throughput	bytes/s
    Network Input Throughput	bytes/s

  • Table 6 lists database metrics.

    Table 6 Database metrics

    Metrics	Unit
    COMMAND Statements per Second	Count/s
    DELETE Statements per Second	Count/s
    INSERT Statements per Second	Count/s
    QUERY Statements per Second	Count/s
    UPDATE Statements per Second	Count/s
    GETMORE Statements per Second	Count/s
    Active Node Connections	Count
    Resident Memory	MB
    Virtual Memory	MB
    Regular Asserts per Second	Count/s
    Warning Asserts per Second	Count/s
    Message Asserts per Second	Count/s
    User Asserts per Second	Count/s

Replica Set

• Monitoring metrics of the primary node
  • Table 2 lists the ECS monitoring metrics.
  • Table 3 lists database metrics.
• Monitoring metrics of the secondary or hidden node
  • Table 2 lists the ECS monitoring metrics.
  • Table 4 lists database metrics.

Parent topic: Interconnected with Cloud Eye