Monitoring

Available in VPC

Monitoring supports 5 types of dashboards, enabling you to check various monitoring information for the performance and history of MongoDB. Monitoring is a service included in NAVER Cloud Platform's Cloud DB for MongoDB, so it can be used without additional charges. Monitoring provides the following dashboards:

DB Dashboard: Monitoring information related to the MongoDB Server in operation
OS Dashboard: Monitoring information related to the operating system of the MongoDB Server in operation
DB Logs: Records of occurrence time and content of all logs that occur from the MongoDB Server in operation
Query Timeline: Query execution history of the MongoDB Server in operation
Audit: Records of occurrence time and content of Audit logs that occur from the MongoDB Server in operation

You can check the performance information of the MongoDB Server within the last 1 year based on average values, and logs and queries from the last 4 weeks through these 5 types of dashboards. Each dashboard consists of multiple graph charts. You can print specific charts or download them to your local PC in various extensions for effective use.

Note

You can set the user to be notified when monitoring results show that a certain metric has exceeded its threshold or met specific conditions by having them recognized as events. For more information on the detailed usage for event and notification settings, see Event.

Since the intuitive search and management for the MongoDB performance information is available without additional charges, if you wish to operate servers stably in an environment without a professional database manager, then we recommend utilizing the monitoring indicators provided through the dashboard.

Monitoring interface

The basics of using Monitoring are as follows:

clouddbformongodb-monitoring-screen_vpc_ko

Component	Description
① Menu name	Current menu name.
② Basic features	Check details for Cloud DB for MongoDB, refresh the Monitoring interface.
③ MongoDB Service list	The list of the MongoDB Services in operation and the list of MongoDB Servers by service.
④ Dashboard	DB Dashboard, OS Dashboard, DB Logs, Query Timeline, and Audit of the selected server from the MongoDB Server list.

View Monitoring dashboards

Dashboards provided by Monitoring consist of multiple graph charts. You can display and intuitively check only the information you need from the dashboard of each server. The information shown in the dashboard is collected every minute to be displayed, but it shows only the average values. To use dashboards:

In the VPC environment of the NAVER Cloud Platform console, navigate to Menu > All Services > Database > Cloud DB for MongoDB.
Click the Monitoring menu.
Click the MongoDB Server to be monitored from the list of MongoDB Service.
Click the button for the dashboard you want to check from the interface on the right.
Click and select all graph charts you want to display and check on the dashboard.
Select a period from the period or query time range selection box, or enter the desired period manually.
Check the results from the dashboard.
- To see the precise metric value of a specific point on the graphic chart, mouse over to the specific point on the graphic chart.
- To see the detailed graph, double-click the graphic chart.
- Print graphic chart: Click , followed by Print chart
- Download a graphic chart to your local PC as a file: Click , followed by the file extension menu for the file you want to download
  - Download PNG image: Image file with the .png extension
  - Download JPEG image: Image file with the .jpeg extension
  - Download PDF document: Document file with the .pdf extension
  - Download SVG vector image: Vector image file with the .svg extension
  - Download CSV: Document file with the .csv extension

Caution

In Step 5, the default setting is select all, and in Step 6, the default time range is the past 1 hour.
In Step 6, the period can be selected up to 1 year for DB Dashboard or OS Dashboard, and up to 4 weeks for DB Logs or Query Timeline.

Note

Navigate to Menu > All Services > Database > Cloud DB for MongoDB > DB Server, select the desired server, and click [Monitoring] to go directly to the interface in Step 4.

DB Dashboard graph charts

The following are some descriptions for the graph charts configured in DB Dashboard:

clouddbformongodb-monitoring-dbdashchart_vpc_ko

clouddbformongodb-monitoring-dbdashchart1_vpc_ko

Graph chart	Unit	Description
Connections	count	Number of maximum DB access sessions available, number of current access sessions, number of active sessions.
Opcounters	count/sec	Number of executions per second by query type.
PageFault	count	Number of reads that was read again from not being in the buffer.
Global Lock	avg activity/sec	Global level lock
Database Lock	seconds	Database level lock
Collection Lock	total/min	Collection level lock
TcmallocSpinLockWait	ns	Waiting time in central heap of tcmalloc.
WiredTiger Cache	GB	Cache information of the wiredTiger storage engine.
WiredTiger Eviction	GB	Eviction information of the wiredTiger storage engine.
WiredTiger Cache Ratio	%	Cache usage of the wiredTiger storage engine.
Task Executor Pool	count	Connection pool between mongos and shard member.
Document Metrics	count/sec	Number of documents updated/returned/deleted/inserted.
Query Executor	count/sec	Index utilization metrics. Scan and order: The number of queries that could not use an index for sorting. Scanned document: Number of times a document scan occurred for query execution. Scanned index: The number of index scan times that occurred for query execution.
Concurrent Read Ticket	count	The number of concurrent read transactions (read tickets) in use or available.
Concurrent Write Ticket	count	The number of concurrent write transactions (write tickets) in use or available.
Replication Delay	seconds	Replication latency time (rs.printSecondaryReplicationInfo).
Oplog	hour	Oplog window, the value obtained by subtracting the oldest time from the most recent time in the oplog.
MongoDB Ping	-	In MongoDB, when the result of the Ping command is 1, it means the database is in a normal and accessible state.
Transactions	count/sec	The number of transactions opened, transactions started, committed transactions, and aborted transactions.

OS Dashboard graph charts

The following are some descriptions for the graph charts configured in OS Dashboard:

clouddbformongodb-monitoring-osdashchart_vpc_ko

Graph chart	Unit	Description
CPU Usage	used(%)	CPU usage.
Load Average	-	Server load.
Memory Usage	used(%)	Memory usage.
Swap	used(%)	Swap memory usage.
Disk Used	GB	Disk usage.
Disk I/O	MB/sec	Disk input/output per second.
Network I/O	MB/sec	Network input/output per second.

DB Logs graph charts

The following are the descriptions for the graph charts configured in DB logs:

clouddbformongodb-monitoring-dblogchart_vpc_ko

Field	Description
Time when event occurred	Time of DB log occurrence
Log content	DB log details.

Note

In DB Logs, you can check the Slow Query log, Login log, Entire log of the MongoDB Server in operation.

Query Timeline graph charts

The following are the descriptions for the graphic charts configured in the Query Timeline:

clouddbformongodb-monitoring-querychart_vpc_ko

Field	Description
Time when event occurred	Time when the query occurred.
Log content	Content of the executed query.

Audit graphic chart

Audit feature is provided by the Enterprise Edition.
Community Edition doesn't provide the Audit feature.
The following are the descriptions for the graphic charts configured in Audit:
clouddbformongodb-monitoring-auditchart_vpc_ko

Field	Description
Time when event occurred	Time when the query occurred.
Log content	Audit Log content.

Note

You can view the DDL, Cluster Monitor, Auth and Entire logs in Audit.
CRUD Operation Log is not provided because it may cause performance degradation.
For Enterprise Edition Cluster created before August 18, 2022, Audit can be enabled after restarting DB.