> For the complete MongoDB documentation index, see www.mongodb.com/docs/llms.txt

# View Real-Time Performance

MongoDB Compass Readonly Edition will be deprecated in a future release. To replicate the read-only behavior in a standard Compass edition, assign users [`read`](https://www.mongodb.com/docs/manual/reference/built-in-roles.md#mongodb-authrole-read) access at the database level and enable the [readOnly](https://www.mongodb.com/docs/compass/settings/read-only.md#std-label-compass-read-only) option in Compass.

To access the real-time server performance view, click the  next to the connection name in the Connections Sidebar and select the Performance menu option.

## Limitations

- MongoDB Compass cannot retrieve performance data for collections that use [Queryable Encryption.](https://www.mongodb.com/docs/manual/core/queryable-encryption.md#std-label-qe-manual-feature-qe)

- MongoDB Compass shows limited performance data when connected to a [`mongos`.](https://www.mongodb.com/docs/manual/reference/program/mongos.md#mongodb-binary-bin.mongos)

## Server Stats

The Performance tab displays various stats:

![Performance statistics example](/images/compass/performance-view-full.png)

| Chart/Table | Description |
| --- | --- |
| Operations | Displays the number of operations as reported by [`mongostat`](https://www.mongodb.com/docs/database-tools/mongostat.md#mongodb-binary-bin.mongostat). For a description of the fields, see [`mongostat`.](https://www.mongodb.com/docs/database-tools/mongostat.md#mongodb-binary-bin.mongostat) |
| Read & Write | Displays the number of active reads, queued reads, active writes, queued writes as reported by [`mongostat`](https://www.mongodb.com/docs/database-tools/mongostat.md#mongodb-binary-bin.mongostat). For a description of the fields, see [mongostat.](https://www.mongodb.com/docs/manual/reference/program/mongostat/#fields) |
| Network | Displays the number of connections as reported by [`mongostat`](https://www.mongodb.com/docs/database-tools/mongostat.md#mongodb-binary-bin.mongostat). For a description of the fields, see [mongostat.](https://www.mongodb.com/docs/manual/reference/program/mongostat/#fields) |
| Memory | Displays the memory stats as reported by [`mongostat`](https://www.mongodb.com/docs/database-tools/mongostat.md#mongodb-binary-bin.mongostat). For a description of the fields, see [mongostat.](https://www.mongodb.com/docs/manual/reference/program/mongostat/#fields) |
| Hottest Collections | Displays the collections with the most activities as reported by [`mongotop`.](https://www.mongodb.com/docs/database-tools/mongotop.md#mongodb-binary-bin.mongotop) The collections correspond to a given moment in the charts; i.e. as you move over the charts, the corresponding collections are highlighted/displayed in the table. |
| Slowest Operations | Displays the slowest operations as reported by [db.currentOp()](https://www.mongodb.com/docs/manual/reference/method/db.currentOp/). The operations correspond to a given moment in the charts; i.e. as you move over the charts, the corresponding slowest operations are displayed in the table. To view the details of a slow operation or [stop the operation](https://www.mongodb.com/docs/compass/performance.md#std-label-kill-long-ops), click on the operation. |

## Stop Slow Operations

You can stop slow operations from the Performance Tab.

**Important: Required Permissions**

On deployments that require [authentication](https://www.mongodb.com/docs/manual/core/authentication/), to stop operations that you don't own, you must have the [`killop`](https://www.mongodb.com/docs/manual/reference/privilege-actions.md#mongodb-authaction-killop) privilege action.

1. Click the query you want to stop in the Slowest Operations section.

2. In the Operation Details view, click Kill Op.

## Pause the Display

The Pause button above the graph display pauses the update of the displays only. Pausing the performance tab does not impact the collection of the underlying data. To restart the display updates, click Play.

Next to the Pause button is a clock which shows the current time while the graphs are updating. If the display is paused, the clock shows the time at which the pause began.