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Monitoring and Alerts

Atlas provides the following ways to monitor your cluster’s performance.

Performance Metrics

Atlas collects and displays metrics on the state of your cluster’s databases and on server usage. Metrics provide an indication of when you must modify your database configuration or add server capacity. See Monitor a Cluster.

Alerts

Atlas notifies you when your database operations or server usage reach thresholds that affect your cluster’s performance. See:

MongoDB Logs

Each mongod and mongos tier keeps an account of its activity in its own log file. Atlas retains the last 30 days of log messages for each tier in a cluster. The Performance Advisor retains at most 7 days of logs for each tier in a cluster.

Note

M0 Free Tier and M2/M5 shared clusters do not provide downloadable logs.

To download the logs for a single tier in a given cluster:

1
2

Select the cluster.

  1. Click the ellipsis icon (...) next to the cluster containing the mongod instance whose logs you want to download.
  2. Select Download Logs.
3

In the Download Logs modal, edit the following fields:

Important

If you have not set a project time zone, the returned log data may not respect the configured date range. See View/Modify Project Settings.

Field Content
Select process Select the process for which you want logs. Valid options are mongod and mongod-audit-log.
Select server Select the server in the cluster whose logs you want to retrieve.
Start Time Specify the date and time in your group’s time zone defining the inclusive lower bound of log activity to return. The start time must be less than 30 days ago.
End Time Specify the date and time in your group’s time zone defining the inclusive upper bound of log activity to return.
4

Click Download Logs.

For information on reading MongoDB logs, refer to the Log Messages documentation in the MongoDB manual.

Database Access Logs

Feature unavailable in Free and Shared-Tier Clusters

This feature is not available for M0 (Free Tier), M2, and M5 clusters. To learn more about which features are unavailable, see Atlas M0 (Free Tier), M2, and M5 Limitations.

You can view authentication attempts that were made against your cluster. Both successful and unsuccessful attempts are logged, including the timestamp of the attempt and which user tried to authenticate.