- Release Notes and Announcements
- User Guide
- Product Introduction
- Purchase Guide
- Getting Started
- Operation Guide
- Access Management
- Instance Management
- Node Management
- Node Overview
- Viewing Node Information
- Adjusting Mongod Node Specification
- Adding Secondary Node
- Deleting Secondary Node
- Adding Read-Only Node
- Adjusting Shard Quantity
- Adjusting Mongos Node Specification
- Adding Mongos Node
- Enabling Mongos Access Address
- Promoting Secondary Node to Primary Node
- Restarting a Node
- Version Upgrade
- Network Configuration
- Monitoring
- Backup and Rollback
- Data Security
- SSL Authentication
- Database Management
- Multi-AZ Deployment
- Disaster Recovery/Read-Only Instances
- Recycle Bin
- Task Management
- Performance Optimization
- Data Migration Guide
- Creating a DTS Migration Task
- Migration Overview
- Supported Capabilities
- User Guide
- Migration Operation Guide
- Fix for Verification Failure
- MongoDB Connection Check
- Database/Table Content Conflict Check
- Source Database Node Role Check
- Oplog Check
- Source/Target Database Account Permission Check
- Database Version Check
- Database Capacity Check
- Target Database Load Check
- ShardKey Check
- Source Database Balancer Check
- Time Series Collection Verification
- Compression Algorithm Verification
- Consistency Check After Migration
- Creating MongoDB Data Subscription
- Creating a DTS Migration Task
- Practical Tutorial
- Optimizing Indexes to Break Through Read/Write Performance Bottlenecks
- Troubleshooting Mongos Load Imbalance in Sharded Cluster
- Considerations for Using Shard Clusters
- Sample of Reading and Writing Data in MongoDB Instance
- Methods for Importing and Exporting Data Based on CVM Connected with MongoDB
- What to Do for Errors of Repeated Instance Creation and Deletion of Databases with the Same Names?
- Troubleshooting MongoDB Connection Failures
- Performance Fine-Tuning
- Ops and Development Guide
- Troubleshooting
- API Documentation
- History
- Introduction
- API Category
- Making API Requests
- Instance APIs
- RenameInstance
- OfflineIsolatedDBInstance
- ModifyDBInstanceSpec
- IsolateDBInstance
- DescribeSpecInfo
- DescribeDBInstances
- DescribeClientConnections
- CreateDBInstanceHour
- AssignProject
- RenewDBInstances
- DescribeSlowLogs
- DescribeSlowLogPatterns
- InquirePriceRenewDBInstances
- InquirePriceModifyDBInstanceSpec
- InquirePriceCreateDBInstances
- DescribeDBInstanceDeal
- DescribeSecurityGroup
- DescribeInstanceParams
- ModifyDBInstanceSecurityGroup
- ModifyDBInstanceNetworkAddress
- Backup APIs
- Account APIs
- Task APIs
- Other APIs
- Data Types
- Error Codes
- Instance Connection
- Product Performance
- FAQs
- Service Agreement
- Glossary
- Contact Us
- Release Notes and Announcements
- User Guide
- Product Introduction
- Purchase Guide
- Getting Started
- Operation Guide
- Access Management
- Instance Management
- Node Management
- Node Overview
- Viewing Node Information
- Adjusting Mongod Node Specification
- Adding Secondary Node
- Deleting Secondary Node
- Adding Read-Only Node
- Adjusting Shard Quantity
- Adjusting Mongos Node Specification
- Adding Mongos Node
- Enabling Mongos Access Address
- Promoting Secondary Node to Primary Node
- Restarting a Node
- Version Upgrade
- Network Configuration
- Monitoring
- Backup and Rollback
- Data Security
- SSL Authentication
- Database Management
- Multi-AZ Deployment
- Disaster Recovery/Read-Only Instances
- Recycle Bin
- Task Management
- Performance Optimization
- Data Migration Guide
- Creating a DTS Migration Task
- Migration Overview
- Supported Capabilities
- User Guide
- Migration Operation Guide
- Fix for Verification Failure
- MongoDB Connection Check
- Database/Table Content Conflict Check
- Source Database Node Role Check
- Oplog Check
- Source/Target Database Account Permission Check
- Database Version Check
- Database Capacity Check
- Target Database Load Check
- ShardKey Check
- Source Database Balancer Check
- Time Series Collection Verification
- Compression Algorithm Verification
- Consistency Check After Migration
- Creating MongoDB Data Subscription
- Creating a DTS Migration Task
- Practical Tutorial
- Optimizing Indexes to Break Through Read/Write Performance Bottlenecks
- Troubleshooting Mongos Load Imbalance in Sharded Cluster
- Considerations for Using Shard Clusters
- Sample of Reading and Writing Data in MongoDB Instance
- Methods for Importing and Exporting Data Based on CVM Connected with MongoDB
- What to Do for Errors of Repeated Instance Creation and Deletion of Databases with the Same Names?
- Troubleshooting MongoDB Connection Failures
- Performance Fine-Tuning
- Ops and Development Guide
- Troubleshooting
- API Documentation
- History
- Introduction
- API Category
- Making API Requests
- Instance APIs
- RenameInstance
- OfflineIsolatedDBInstance
- ModifyDBInstanceSpec
- IsolateDBInstance
- DescribeSpecInfo
- DescribeDBInstances
- DescribeClientConnections
- CreateDBInstanceHour
- AssignProject
- RenewDBInstances
- DescribeSlowLogs
- DescribeSlowLogPatterns
- InquirePriceRenewDBInstances
- InquirePriceModifyDBInstanceSpec
- InquirePriceCreateDBInstances
- DescribeDBInstanceDeal
- DescribeSecurityGroup
- DescribeInstanceParams
- ModifyDBInstanceSecurityGroup
- ModifyDBInstanceNetworkAddress
- Backup APIs
- Account APIs
- Task APIs
- Other APIs
- Data Types
- Error Codes
- Instance Connection
- Product Performance
- FAQs
- Service Agreement
- Glossary
- Contact Us
The monitoring feature provided by TencentDB for MongoDB allows you to view the real-time monitoring metric data of instance resources. It collects the monitoring statistics in various forms such as visual chart, table, and dashboard. In addition, it supports setting alarms and pushing alarm notifications promptly, so that you can stay up to date with database service exceptions and adjust your business in time to guarantee stable business operations.
Monitoring Granularity
TencentDB for MongoDB currently doesn't allow you to customize the monitoring data collection granularity. The adaptive policy is as follows:
Time Span | Monitoring Granularity | Retention Period |
0–1 day | 5 seconds | 1 day |
0–1 day | 1 minute | 15 days |
0–1 day | 5 minutes | 31 days |
0–1 day | 1 hour | 93 days |
0–1 day | 1 days | 186 days |
0–7 days | 1 hour | 93 days |
0–7 days | 1 day | 186 days |
7–30 days | 1 hour | 93 days |
7–30 days | 1 day | 186 days |
Instance Types for Monitoring
Instance: Primary, read-only, and disaster recovery instances can be monitored, and each instance is provided with a separate monitoring view.
Node: All mongod and mongos nodes can be monitored, and each node is provided with a separate monitoring view.
Monitoring Metrics
Instances
Dimension | Monitoring Metric | Parameter | Unit | Metric Description |
CPU Monitoring | Max CPU Utilization of Mongod | mongod_max_mem_usage | % | Maximum CPU utilization among all mongod nodes in the cluster. |
| Average Mongod CPU Utilization | monogd_avg_cpu_usage | % | Average CPU utilization of all mongod nodes in the cluster. |
| Max CPU Utilization of Mongos | monogs_max_cpu_usage | % | Maximum CPU utilization among all mongos nodes in the sharded cluster. |
| Average Mongos CPU Utilization | monogs_avg_cpu_usage | % | Average CPU utilization of all mongos nodes in the sharded cluster. |
Memory Monitoring | Max Memory Utilization of Mongod | mongod_max_mem_usage | % | Maximum memory utilization among all mongod nodes in the cluster. |
| Average Memory Utilization of Mongod | mongod_avg_mem_usage | % | Average memory utilization of all mongod nodes in the cluster. |
| Max Memory Utilization of Mongos | mongos_max_mem_usage | % | Maximum memory utilization among all mongos nodes in the sharded cluster. |
| Average Memory Utilization of Mongos | mongos_avg_mem_usage | % | Average memory utilization of all mongos nodes in the sharded cluster. |
Disk Monitoring | Storage Space Utilization | disk_usage | % | Proportion of the used disk space to the disk space applied for. |
Network Monitoring | Connections | cluster_conn | Pcs | Number of TCP connections to the instance. |
| Connection Percentage | connper | % | Proportion of current connections to the maximum connections. |
| Inbound Traffic | cluster_view | Bytes | Number of bytes in the traffic inbound to the cluster. |
| Outbound Traffic | cluster_netout | Bytes | Number of bytes in the traffic outbound from the cluster. |
Latency Monitoring | Average Latency of All Requests | avg_all_request_delay | ms | Average execution latency of all requests in the cluster. |
| Average Update Delay | avg_update_delay | ms | Average latency of update requests in the cluster. |
| Average Insertion Delay | avg_insert_delay | ms | Average latency of insertion requests in the cluster. |
| Average Read Latency | avg_read_delay | ms | Average latency of read requests in the cluster. |
| Average Latency of Aggregate Requests | avg_aggregate_delay | ms | Average latency of aggregate requests in the cluster. |
| Average Count Delay | avg_count_delay | ms | Average latency of count requests in the cluster. |
| Average getMore Delay | avg_getmore_delay | ms | Average latency of getMore requests in the cluster. |
| Average Deletion Delay | avg_delete_delay | ms | Average latency of deletion requests in the cluster. |
| Average Command Latency | avg_command_delay | ms | Average latency of command requests in the cluster other than INSERT, UPDATE, DELETE, and QUERY requests. |
| 10–50 ms | 10 ms | - | Number of requests with an execution time between 10 and 50 ms. |
| 50–100 ms | 50 ms | - | Number of requests with an execution time between 50 and 100 ms. |
| 100 ms | 100 ms | - | Number of requests with an execution time of more than 100 ms. |
Request Monitoring | Total Requests | success_per_second | Counts/sec | Number of requests successfully executed in the cluster per second. |
| Insert Requests | insert_per_second | Counts/sec | Number of insertion requests executed in the cluster per second. |
| Read Requests | read_per_second | Counts/sec | Number of read requests executed in the cluster per second. |
| Update Requests | update_per_second | Counts/sec | Number of update requests executed in the cluster per second. |
| Deletion Requests | delete_per_second | Counts/sec | Number of deletion requests executed in the cluster per second. |
| Count Requests | count_per_second | Counts/sec | Number of count requests received by the cluster per second. |
| getMore Requests | getmore_per_second | Counts/sec | Number of getMore requests received by the cluster per second. |
| Aggregate Requests | aggregate_per_second | Counts/sec | Number of aggregate requests in the cluster per second. |
| Command Requests | command_per_second | Counts/sec | Number of command requests received by the cluster per second other than INSERT, UPDATE, DELETE, and QUERY requests. |
Request Count | Total requests | node_success | - | Total number of requests in the cluster. |
| Insert Requests | node_inserts | - | Number of insertion requests received by the cluster. |
| Read Requests | node_reads | - | Number of read requests received by the cluster. |
| Update Requests | node_updates | - | Number of update requests in the cluster. |
| Deletion Requests | node_deletes | - | Number of deletion requests in the cluster. |
| Count Requests | node_counts | - | Number of count requests received by the cluster. |
| getMore Requests | node_getmores | - | Number of getMore requests received by the cluster. |
| Aggregate Requests | node_aggregates | - | Number of aggregate requests in the cluster. |
| Command Requests | node_commands | - | Number of command requests received by the cluster other than INSERT, UPDATE, DELETE, and QUERY requests. |
Mongod node
Dimension | Monitoring Metric | Parameter | Unit | Metric Description |
CPU Monitoring | CPU Utilization | cpuusage | % | CPU utilization of the mongod node. |
Memory Monitoring | Memory Utilization | memusage | % | Memory utilization of the mongod node. |
Disk Monitoring | Used Disk Space | diskusage | MBytes | Disk capacity usage of the mongod node. |
| Disk Reads | ioread | Counts/sec | Number of writes on the mongod node per second. |
| Disk Writes | iowrite | Counts/sec | Number of writes on the mongod node per second. |
Network Monitoring | Inbound Traffic | netout | Bytes | Number of bytes in the traffic inbound to the mongod node. |
| Outbound Traffic | netin | Bytes | Number of bytes in the traffic outbound from the mongod node. |
Average Request Latency Monitoring | Average Latency of All Requests | node_avg_all_requests_delay | ms | Average latency of all requests received by the mongod node. |
| Average Update Delay | node_avg_update_delay | ms | Average latency of update requests on the mongod node. |
| Average Insertion Delay | node_avg_insert_delay | ms | Average latency of insertion requests on the mongod node. |
| Average Read Latency | node_avg_read_delay | ms | Average latency of read requests on the mongod node. |
| Average Latency of Aggregate Requests | node_avg_aggregate_delay | ms | Average latency of aggregate requests on the mongod node. |
| Average Count Delay | node_avg_count_delay | ms | Average latency of count requests on the mongod node. |
| Average getMore Delay | node_avg_getmore_delay | ms | Average latency of getMore requests on the mongos node. |
| Average Deletion Delay | node_avg_delete_delay | ms | Average latency of deletion requests on the mongod node. |
| Average Command Latency | node_avg_command_delay | ms | Average latency of command requests on the mongod node. |
| 10-50 ms | 10 ms | - | Number of requests with an execution time between 10 and 50 ms. |
| 50-100 ms | 50 ms | - | Number of requests with an execution time between 50 and 100 ms. |
| 100 ms | 100 ms | - | Number of requests with an execution time of more than 100 ms. |
Request Monitoring | Total Requests | node_success_per_second | Counts/sec | Total number of requests on the mongod node per second. |
| Insert Requests | node_insert_per_second | Counts/sec | Number of insertion requests on the mongod node per second. |
| Read Requests | node_read_per_second | Counts/sec | Number of read requests on the mongod node per second. |
| Update Requests | node_update_per_second | Counts/sec | Number of update requests on the mongod node per second. |
| Deletion Requests | node_delete_per_second | Counts/sec | Number of deletion requests on the mongod node per second. |
| Count Requests | node_count_per_second | Counts/sec | Number of count requests received by the mongod node per second. |
| getMore Requests | node_getmore_per_second | Counts/sec | Number of getMore requests received by the mongod node per second. |
| Aggregate Requests | node_aggregate_per_second | Counts/sec | Number of aggregate requests in the mongod node per second. |
| Command Requests | node_command_per_second | Counts/sec | Number of command requests received by the mongod node per second other than INSERT, UPDATE, DELETE, and QUERY requests. |
Kernel Monitoring | Active Write Requests | ar | - | Number of active write requests on the mongod node. |
| Active Read Requests | aw | - | Number of active read requests on the mongod node. |
| Queuing Read Requests | qr | - | Length of the client read request queue on the mongod node. |
| Queuing Write Requests | qw | - | Length of the client write request queue on the mongod node. |
| Pieces of Data Deleted via TTL | ttl_deleted | - | Number of documents deleted through TTL on the mongod node. |
| TTL Initiation Times | ttl_pass | - | Number of documents deletions from the TTL collection performed by the backend process. |
| Active Sessions | active_session | - | Number of active sessions on the node. |
| Oplog Retention Period | node_oplog_reserved_time | hours | Oplog retention period. |
| Primary/Secondary Delay | node_slavedelay | seconds | Delay time between the primary and secondary nodes. |
| Cache Hit Rate | replicaset_node | % | Cache hit rate of the current cluster. |
| Cache Utilization (%) | node_cache_used | % | Percentage of the used cache to the total cache space. |
| Dirty Data (%) in Cache | node_cache_dirty | % | Percentage of the size of dirty data in the cache to the total cache space. |
Request Count | Total requests | node_success | - | Total number of requests in the cluster. |
| Insert Requests | node_inserts | - | Number of insertion requests in the cluster. |
| Read Requests | node_reads | - | Number of read requests in the cluster. |
| Update Requests | replicaset_node | - | Number of update requests in the cluster. |
| Delete Requests | node_deletes | - | Number of deletion requests in the cluster. |
| Count Requests | node_counts | - | Number of count requests received by the cluster. |
| getMore Requests | node_getmores | - | Number of getMore requests received by the cluster. |
| Aggregate Requests | node_aggregates | - | Number of aggregate requests in the cluster. |
| Command Requests | node_commands | - | Number of command requests received by the cluster other than INSERT, UPDATE, DELETE, and QUERY requests. |
Mongos node (sharded cluster)
Dimension | Monitoring Metric | Monitoring Metric | Unit | Metric Description |
CPU Monitoring | CPU Utilization | cpuusage | % | CPU utilization of the mongos node. |
Memory Monitoring | Memory Utilization | memusage | % | Memory utilization of the mongos node. |
Network Monitoring | Private Inbound Traffic | netout | Bytes | Number of bytes in the traffic inbound to the mongos node. |
| Private Outbound Traffic | netin | Bytes | Number of bytes in the traffic outbound from the mongos node. |
Latency Monitoring | Average Latency of All Requests | node_avg_all_request_delay | ms | Average latency of all requests received by the mongos node. |
| Average Update Delay | node_avg_update_delay | ms | Average latency of update requests on the mongos node. |
| Average Insertion Delay | replicaset_node | ms | Average latency of insertion requests on the mongos node. |
| Average Read Latency | node_avg_read_delay | ms | Average latency of read requests on the mongos node. |
| Average Latency of Aggregate Requests | node_avg_aggregate_delay | ms | Average latency of aggregate requests on the mongos node. |
| Average Count Delay | node_avg_count_delay | ms | Average latency of count requests on the mongos node. |
| Average getMore Delay | node_avg_getmore_delay | ms | Average latency of getMore requests on the mongos node. |
| Average Deletion Delay | node_avg_delete_delay | ms | Average latency of deletion requests on the mongos node. |
| Average Command Latency | node_avg_command_delay | ms | Average latency of command requests on the mongos node other than INSERT, UPDATE, DELETE, and QUERY requests. |
| 10-50 ms | 10 ms | - | Number of requests per second with an execution time between 10 and 50 ms. |
| 50-100 ms | 50 ms | - | Number of requests per second with an execution time between 50 and 100 ms. |
| 100 ms | 100 ms | - | Number of requests per second with an execution time of more than 100 ms. |
Request Monitoring | Total Requests | qps | Counts/sec | Total number of requests on the mongos node per second. |
| Insert Requests | inserts | Counts/sec | Number of insertion requests on the mongos node per second. |
| Read Requests | reads | Counts/sec | Number of read requests on the mongos node per second. |
| Update Requests | updates | Counts/sec | Number of update requests on the mongos node per second. |
| Deletion Requests | deletes | Counts/sec | Number of deletion requests on the mongos node per second. |
| Count Requests | counts | Counts/sec | Number of count requests received by the mongos node per second. |
| getMore Requests | getmores | Counts/sec | Number of getMore requests received by the mongos node per second. |
| Aggregate Requests | aggregates | Counts/sec | Number of aggregate requests in the mongos node per second. |
| Command Requests | commands | Counts/sec | Number of command requests received by the mongos node per second other than INSERT, UPDATE, DELETE, and QUERY requests. |
Request Count | Total requests | node_success | - | Total number of requests received by the mongos node. |
| Insert Requests | node_inserts | - | Number of insertion requests received by the mongos node. |
| Read Requests | node_reads | - | Number of read requests received by the mongos node. |
| Update Requests | node_updates | - | Number of update requests received by the mongos node. |
| Delete Requests | node_deletes | - | Number of deletion requests received by the mongos node. |
| Count Requests | node_counts | - | Number of count requests received by the mongos node. |
| getMore Requests | node_getmores | - | Number of getMore requests received by the mongos node. |
| Aggregate Requests | node_aggregates | - | Number of aggregate requests received by the mongos node. |
| Command Requests | node_commands | - | Number of command requests received by the mongos node other than INSERT, UPDATE, DELETE, and QUERY requests. |
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