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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

    Commands per Second

    Executions/s

    Delete Operations per Second

    Executions/s

    Insert Operations per Second

    Executions/s

    Query Operations per Second

    Executions/s

    Update Operations per Second

    Executions/s

    Getmore Operations per Second

    Executions/s

    Number of Chunks of Shard 1

    Counts

    Number of Chunks of Shard 2

    Counts

    Number of Chunks of Shard 3

    Counts

    Number of Chunks of Shard 4

    Counts

    Number of Chunks of Shard 5

    Counts

    Number of Chunks of Shard 6

    Counts

    Number of Chunks of Shard 7

    Counts

    Number of Chunks of Shard 8

    Counts

    Number of Chunks of Shard 9

    Counts

    Number of Chunks of Shard 10

    Counts

    Number of Chunks of Shard 11

    Counts

    Number of Chunks of Shard 12

    Counts

    Current DB Instance Active Connections

    Counts

    Chunk Migration Failures in Last 24 hrs

    Counts

  • 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

      Percentage (%)

      Memory Usage

      Percentage (%)

      Network Output Throughput

      Bytes/s

      Network Input Throughput

      Bytes/s

      Disk Utilization

      Percentage (%)

      IOPS

      Operations/s

      Disk Read Throughput

      Bytes/s

      Disk Write Throughput

      Bytes/s

      Average Time per Disk Read

      Second

      Average Time per Disk Write

      Second

      Total Disk Size

      GB

      Disk Usage

      GB

    • Table 3 lists database metrics.
      Table 3 Database metrics

      Metrics

      Unit

      Commands per Second

      Executions/s

      Delete Operations per Second

      Executions/s

      Insert Operations per Second

      Executions/s

      Query Operations per Second

      Executions/s

      Update Operations per Second

      Executions/s

      Getmore Operations per Second

      Executions/s

      Current Active Connections

      Counts

      Resident Memory

      MB

      Virtual Memory

      MB

      Regular Asserts per Second

      Executions/s

      Warning Asserts per Second

      Executions/s

      Message Asserts per Second

      Executions/s

      User Asserts per Second

      Executions/s

      Number of Operations Queued Waiting for the Lock

      Counts

      Number of Operations Queued Waiting for the Read Lock

      Counts

      Number of Operations Queued Waiting for the Write Lock

      Counts

      Number of Page Faults

      Counts

      Number of Slow Queries

      Counts

      Number of Current Maintained Cursors

      Counts

      Number of Timed Out Cursors

      Counts

      Bytes in Cache When Using WiredTiger

      MB

      Tracked Dirty Bytes in Cache When Using WiredTiger

      MB

      Bytes Read into Cache per Second When Using WiredTiger

      Bytes/s

      Bytes Written from Cache per Second When Using WiredTiger

      Bytes/s

      Oplog Available Time on Primary Node

      Hours

      Oplog Generation Speed on Primary Node

      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

      Commands per Second

      Executions/s

      Delete Operations per Second

      Executions/s

      Insert Operations per Second

      Executions/s

      Query Operations per Second

      Executions/s

      Update Operations per Second

      Executions/s

      Getmore Operations per Second

      Executions/s

      Current Active Connections

      Counts

      Resident Memory

      MB

      Virtual Memory

      MB

      Regular Asserts per Second

      Executions/s

      Warning Asserts per Second

      Executions/s

      Message Asserts per Second

      Executions/s

      User Asserts per Second

      Executions/s

      Number of Operations Queued Waiting for the Lock

      Counts

      Number of Operations Queued Waiting for the Read Lock

      Counts

      Number of Operations Queued Waiting for the Write Lock

      Counts

      Number of Page Faults

      Counts

      Number of Slow Queries

      Counts

      Number of Current Maintained Cursors

      Counts

      Number of Timed Out Cursors

      Counts

      Bytes in Cache When Using WiredTiger

      MB

      Tracked Dirty Bytes in Cache When Using WiredTiger

      MB

      Bytes Read into Cache per Second When Using WiredTiger

      Bytes/s

      Bytes Written from Cache per Second When Using WiredTiger

      Bytes/s

      Overlapping Oplog Time Between Primary and Secondary Nodes

      Second

      Delay Between Primary and Secondary Nodes

      Second

      Replicated Commands per Second

      Executions/s

      Replicated Update Operations per Second

      Executions/s

      Replicated Delete Operations per Second

      Executions/s

      Replicated Insert Operations per Second

      Executions/s

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

      Metrics

      Unit

      CPU Usage

      Ratio

      Memory Usage

      Ratio

      Network Output Throughput

      Bytes/s

      Network Input Throughput

      Bytes/s

    • Table 6 lists database metrics.
      Table 6 Database metrics

      Metrics

      Unit

      Commands per Second

      Executions/s

      Delete Operations per Second

      Executions/s

      Insert Operations per Second

      Executions/s

      Query Operations per Second

      Executions/s

      Update Operations per Second

      Executions/s

      Getmore Operations per Second

      Executions/s

      Current Active Connections

      Counts

      Resident Memory

      MB

      Virtual Memory

      MB

      Regular Asserts per Second

      Executions/s

      Warning Asserts per Second

      Executions/s

      Message Asserts per Second

      Executions/s

      User Asserts per Second

      Executions/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.