Cloud Database DocDB for MongoDB

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BCM

  • Function Release Records
  • Product Announcement
    • Site Monitor Billing Announcement
  • Product Description
    • Product Introduction
    • Core concepts
    • Product advantages
    • Product features
  • Product pricing
    • Product pricing
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  • Quick Start
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    • Enter Cloud Monitor
    • Dashboard
      • Overview
      • Management Dashboard Charts
      • Management Dashboard
    • Alarm Service
      • Overview
      • Alarm strategy
      • Alarm history
      • Alarm Template
      • Alarm Notification Template
      • Alarm callback
    • Cloud product monitor
      • Instance monitor
      • Instance Group
      • View Metrics
    • Site Monitor
      • Timed Detection (Formerly Site Monitor)
        • Overview
        • Manage Timed Probe Tasks
        • Purchase Guide
        • View timed probe tasks
      • IP advanced fault diagnosis
        • Manage IP Advanced Fault Diagnosis Tasks
        • View IP Advanced Fault Diagnosis Tasks
      • Instant probe
        • Overview
        • Manage instant probe tasks
    • Event Monitor
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      • Event Delivery History
      • Overview
      • Event summary
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      • Event Rules
        • Event Rules
        • Event content conversion
        • Event pattern
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    • Error response
    • Query Monitoring Data for Partial Dimensions
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    • Common Request and Response Headers
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    • Alarm Management Interface V2
    • Alarm history
    • Push Data API
    • Event Bus Push
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    • Dimension Value TopN and Monitoring Data Query Interface
    • Batch Query Monitoring Data Interface V2
    • Dimension Value TopN Query Interface
    • Instance Group Interface
    • Site Monitor
    • Query Latest Metric Data for Partial Dimensions
    • General Description
    • Query Data API
    • Event Monitor
    • Instant Probe
    • Event Alarm History
    • Notification Template
  • Java-SDK
    • Overview
    • Initialization
    • Install the SDK Package
    • BcmClient
    • Query Monitoring Data for Partial Dimensions
    • Dimension Value TopN and Monitoring Data Query Interface
    • Batch Query Monitoring Data Interface V2
    • Dimension Value TopN Query Interface
    • Query Latest Metric Data for Partial Dimensions
    • Query Data API
    • Alarm Strategy-related APIs
    • Batch Query Data Interface
    • Alarm History-related APIs
  • Python-SDK
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    • Install SDK
    • BcmClient
    • Query Monitoring Data for Partial Dimensions
    • Batch Query Monitoring Data Interface V2
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    • Query Latest Metric Data for Partial Dimensions
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    • Batch Data Query Interface
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    • Install the SDK Package
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    • Query Monitoring Data for Partial Dimensions
    • Dimension Value TopN and Monitoring Data Query Interface
    • Batch Query Monitoring Data Interface V2
    • Dimension Value TopN Query Interface
    • Query Latest Metric Data for Partial Dimensions
    • Query Data API
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    • Alarm History-related APIs
    • Batch Data Query Interface
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        • Layer 2 Gateway LTGW
        • Physical dedicated line
      • Intelligent Big Data
        • MapReduce BMR
        • Message service for Kafka-dedicated
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        • Qianfan Large Model Platform ModelBuilder
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    • Usage Scenarios for Different Notification Channels
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Table of contents on this page
  • Replica Set Instance (Replica)
  • Shard Set Instance (Shard)

Cloud Database DocDB for MongoDB

Updated at：2025-11-03

Cloud database DocDB for MongoDB includes 2 types of monitor objects: Replica Set Instance (Replica) and Shard Set Instance (Shard). The list of monitoring metrics for each type is as follows:

Replica Set Instance (Replica)

Metric name (English) Metric name (Chinese) Unit Dimension Remarks
ActiveReaders Clients holding global read lock Item InstanceId,NodeId
ActiveWriters Clients holding global write lock Item InstanceId,NodeId
CommandOPCount command operation Time/second InstanceId,NodeId
ConnectionsUsage Instance connection utilization % InstanceId,NodeId
CpuUsage CPU usage % InstanceId,NodeId
CurrentConnections Instance connections Item InstanceId,NodeId
CurrentQueueReaders Read lock wait queue length Item InstanceId,NodeId
CurrentQueueWriters Write lock wait queue length Item InstanceId,NodeId
DeletedDocumentCount Deleted files Item/second InstanceId,NodeId
DeleteOPCount delete operation Time/second InstanceId,NodeId
DiskUsage Disk space usage rate % InstanceId,NodeId
DiskUsed Disk space usage MB InstanceId,NodeId
GetMoreOPCount getmore operation Time/second InstanceId,NodeId
InsertedDocumentCount Inserted files Item/second InstanceId,NodeId
InsertOPCount insert operation Time/second InstanceId,NodeId
MemoryUsage Memory usage % InstanceId,NodeId
NetInBytes Ingress traffic Bytes/s InstanceId,NodeId
NetOutBytes Egress traffic Bytes/s InstanceId,NodeId
OpenCursorsCount Open Cursors count Item InstanceId,NodeId
OplogReservedTime oplog retention period Second InstanceId,NodeId
QueryOPCount query operation Time/second InstanceId,NodeId
ReadConcurrentTransactionsAvailable Available read transaction parallelism Item InstanceId,NodeId
ReadConcurrentTransactionsOut Read transaction parallelism Item InstanceId,NodeId
ReplicationLag Master-slave latency Second InstanceId,NodeId
ReturnDocumentCount Returned files Item/second InstanceId,NodeId
ScanAndOrder Unindexed sort operations Time/second InstanceId,NodeId
ScannedDocs Scanned files Item/second InstanceId,NodeId
ScannedKeys Scanned indexes Item/second InstanceId,NodeId
TimedoutCursorsCount Timeout count in the last minute Item InstanceId,NodeId
UpdatedDocumentCount Updated files Item/second InstanceId,NodeId
UpdateOPCount update operation Time/second InstanceId,NodeId
WiredTigerCacheUsage WiredTigerCache utilization % InstanceId,NodeId
WiredTigerDirtyCachePercent WiredTigerCache dirty page rate % InstanceId,NodeId
WriteConcurrentTransactionsAvailable Available write transaction parallelism Item InstanceId,NodeId
WriteConcurrentTransactionsOut Write transaction parallelism Item InstanceId,NodeId
WriteConflict Write collisions Time/second InstanceId,NodeId

Shard Set Instance (Shard)

Metric name (English) Metric name (Chinese) Unit Dimension Remarks
ActiveReaders Clients holding global read lock Item InstanceId,NodeId
ActiveWriters Clients holding global write lock Item InstanceId,NodeId
CommandOPCount command operation Time/second InstanceId,NodeId
ConnectionsUsage Instance connection utilization % InstanceId,NodeId
CpuUsage CPU usage % InstanceId,NodeId
CurrentConnections Instance connections Item InstanceId,NodeId
CurrentQueueReaders Read lock wait queue length Item InstanceId,NodeId
CurrentQueueWriters Write lock wait queue length Item InstanceId,NodeId
DeletedDocumentCount Deleted files Item/second InstanceId,NodeId
DeleteOPCount delete operation Time/second InstanceId,NodeId
DiskUsage Disk space usage rate % InstanceId,NodeId
DiskUsed Disk space usage MB InstanceId,NodeId
GetMoreOPCount getmore operation Time/second InstanceId,NodeId
InsertedDocumentCount Inserted files Item/second InstanceId,NodeId
InsertOPCount insert operation Time/second InstanceId,NodeId
MemoryUsage Memory usage % InstanceId,NodeId
NetInBytes Ingress traffic Bytes/s InstanceId,NodeId
NetOutBytes Egress traffic Bytes/s InstanceId,NodeId
OpenCursorsCount Open Cursors count Item InstanceId,NodeId
OplogReservedTime oplog retention period Second InstanceId,NodeId
QueryOPCount query operation Time/second InstanceId,NodeId
ReadConcurrentTransactionsAvailable Available read transaction parallelism Item InstanceId,NodeId
ReadConcurrentTransactionsOut Read transaction parallelism Item InstanceId,NodeId
ReplicationLag Master-slave latency Second InstanceId,NodeId
ReturnDocumentCount Returned files Item/second InstanceId,NodeId
ScanAndOrder Unindexed sort operations Time/second InstanceId,NodeId
ScannedDocs Scanned files Item/second InstanceId,NodeId
ScannedKeys Scanned indexes Item/second InstanceId,NodeId
TimedoutCursorsCount Timeout count in the last minute Item InstanceId,NodeId
UpdatedDocumentCount Updated files Item/second InstanceId,NodeId
UpdateOPCount update operation Time/second InstanceId,NodeId
WiredTigerCacheUsage WiredTigerCache utilization % InstanceId,NodeId
WiredTigerDirtyCachePercent WiredTigerCache dirty page rate % InstanceId,NodeId
WriteConcurrentTransactionsAvailable Available write transaction parallelism Item InstanceId,NodeId
WriteConcurrentTransactionsOut Write transaction parallelism Item InstanceId,NodeId
WriteConflict Write collisions Time/second InstanceId,NodeId

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