Configure the NodeSync refresh data interval

Tune the configuration option if necessary to adjust the frequency of refreshing NodeSync status data in OpsCenter Monitoring:

To edit all clusters at once, edit opscenterd.conf, which is located at /etc/opscenter/opscenterd.conf for package installations, or at INSTALL_DIRECTORY/conf/opscenterd.conf for tarball installations.

To edit a specific cluster, edit the CLUSTER_NAME.conf file located at /etc/opscenter/clusters/ for package installations, or at INSTALL_DIRECTORY/conf/clusters/ for tarball installations.

To edit the configuration at the node level, edit address.yaml for each applicable node. This file is located at /var/lib/datastax-agent/conf/address.yaml for package installations, or at INSTALL_DIRECTORY/conf/address.yaml for tarball installations.
Set the following option for your environment requirements in the [nodesync] section:

The following configuration example triples the refresh interval from 5 minutes (300 seconds) to 15 minutes (900 seconds):
```
[nodesync]
refresh_period=900
```
The refresh_period configuration option represents the period of time (in seconds) between each NodeSync service refresh of status data from the NodeSync metrics table. The default is 300 seconds (5 minutes). If a status refresh takes 2 minutes to complete, the refresh period timer starts again and refreshes the NodeSync Status view after another 5 minutes.
Restart opscenterd.
If you made changes to address.yaml, restart the DataStax agents.

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