Monitor Real-Time Performance
On this page
Only available on M10+ clusters and serverless instances
The Real-Time Performance Panel (RTPP) monitors and displays current network traffic, database operations on the machines hosting MongoDB in your clusters, and hardware statistics about the hosts. Use RTPP to visually identify relevant database operations, evaluate query execution times and the ratio of documents scanned to documents returned, monitor network load and throughput, and discover potential replication lag on secondary members of replica sets.
Enable or Disable the Real-Time Performance Panel
To enable or disable Real-Time Performance Panel for a
project, you must have the Project Owner role for the
project.
Real-Time Performance Panel is enabled by default. To disable or enable the Real-Time Performance Panel for a project:
Click Settings.
Toggle the button next to Real-Time Performance Panel.
Access the Real-Time Performance Panel
To view the Real-Time Performance Panel:
Click Database.
Click the cluster whose current operations you want to evaluate.
If the replica set resides in a sharded cluster, first click the sharded cluster containing the replica set.
Click the member of the replica set that you want to view.
Click Real Time.
Atlas displays the data as a graph. Click Table to view the data as a table.
(Optional) Click Pause to stop RTPP from displaying incoming data. Click Play to resume.
Graph View
Chart/Location | Description |
|---|---|
Connections, Network In, Network Out (Top of panel) | Displays the number of current connections to the machine
hosting MongoDB and the number of inbound and outbound bytes as
reported by mongostat. |
CPU, Disk Util, and Sys Mem (Top of panel) | Displays the currently used percentage of CPU and disk capacity
and the total physical memory usage, excluding buffers and swap
space, of the machine hosting MongoDB. |
Operations | Displays the number of operations as reported by
mongostat. |
Query Execution Times | Displays latency statistics for current read requests, write
requests, and other database commands. Available in MongoDB 3.6
or later. See opLatencies at serverStatus for more information. |
Query Targeting | Displays the ratio of documents and objects scanned to documents
and objects returned in current queries. These statistics are
useful in determining if and how a query uses an index. See
Analyze Query Performance for more information. |
Reads & Writes | Displays the number of active reads, queued reads, active
writes, and queued writes as reported by mongostat. |
Replication Lag | Available only for secondary members of a replica set. Displays
the time required to replicate operations from the primary to
the secondary members of a replica set. See Replica Set
Secondary Members for more
information. |
Hottest Collections | Displays the collections with the most operations as reported by
Utilization Percent is calculated from the read and
write times as reported by The hottest collections correspond to the most current time displayed in the charts. That is, if the display is running (i.e. not paused), the collections correspond to the hottest collections at the current timestamp. If the display is paused, the collections correspond to the hottest collections at the paused time. |
Slowest Operations | Displays the slowest operations as reported by db.currentOp(). The operations correspond to the most current time displayed in the charts. That is, if the display is running (i.e. not paused), the operations correspond to the slowest operations at the current timestamp. If the display is paused, the operations correspond to the slowest operations at the paused time. Select one of the operations to open the Operation Details panel, where you can terminate the selected operation using the Kill Op button. The Kill Op button issues the db.killOp() method on the selected operation. Important You can only terminate operations from RTPP if Data Explorer is enabled for your project. |
Read Exact Metrics from Graph View
If you pause the Graph view of the Real-Time Performance Panel, you can hover over a line graph to see its exact value, along with the slowest operations and hottest collections, at a given moment in time.
Pausing the Performance Panel does not affect the collection of the underlying data. When you resume the Graph view, the line graphs restart from an empty display.
Table View
Click to hide or display fields from the table.
Fields | Description |
|---|---|
Commands Queries Updates Deletes Inserts GetMores | Displays the number of the specified operations (commands,
queries, etc.) as reported by mongostat. |
Time / Read Time / Write Time / Command | Displays latency statistics for current read requests, write
requests, and other database commands. To learn more, see
opLatencies in serverStatus. |
Scanned / Returned Scanned Objects / Returned | Displays the ratio of documents and objects scanned to documents
and objects returned in current queries. These statistics are
useful in determining if and how a query uses an index. To learn
more, see Analyze Query Performance. |
Active Readers Active Writers Queued Readers Queued Writers | Displays the number of active reads, queued reads, active
writes, and queued writes as reported by mongostat. |
Lag Time | Available only for secondary members of a replica set. Displays
the time required to replicate operations from the primary to
the secondary members of a replica set. To learn more, see
Replica Set Secondary Members. |
CPU Disk Util Sys Mem | Displays the currently used percentage of CPU and disk capacity
and the total physical memory usage, excluding buffers and swap
space, of the machine hosting MongoDB. |
Connections Bytes In Bytes Out | Displays the number of current connections to the machine
hosting MongoDB and the number of inbound and outbound bytes as
reported by mongostat. |