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  6. DDS Metrics

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.