Couchbase monitoring

Couchbase server monitoring in Dynatrace provides a high-level overview of all Couchbase components in your cluster.

Prerequisites

Linux OS or Windows
Couchbase version 4.3+

Enabling Couchbase monitoring globally

With Couchbase monitoring enabled globally, Dynatrace automatically collects Couchbase metrics whenever a new host running Couchbase is detected in your environment.

In the Dynatrace menu, go to Settings.
Select Monitoring > Monitored technologies.
On the Supported technologies tab, find the Couchbase entry and select in the Edit column to expand the row.
Set the User and Password.
The credentials have to work for all Couchbase hosts that you want to monitor. The provided user should have a minimum role of Read-Only Admin.
Set the Port.
The default port is 8091.
Select Save.
Turn on the Global monitoring switch for Couchbase.
Couchbase monitoring is enabled globally.

Enabling Couchbase monitoring for individual hosts

Dynatrace provides the option of enabling Couchbase monitoring for specific hosts rather than globally.

If global Couchbase monitoring is currently switched on, switch it off: go to Settings > Monitoring > Monitored technologies and set the Couchbase switch to the Off position.
In the Dynatrace menu, go to Hosts.
Find the host you want to configure.
Use the filter at the top of the list to help you locate the host.
Select the host to open the host page.
Select More (…) > Settings to open the Host settings page.
In the Monitored technologies list, find the Couchbase row and turn on the Monitoring switch.
Couchbase monitoring is enabled for the selected host.

Monitoring Couchbase clusters

In the Dynatrace menu, go to Technologies.
Select the Couchbase tile.
To view cluster metrics, expand the Details section of the Couchbase process group.
Select Process group details.
On the Process group details page, select the Technology-specific metrics tab to view relevant cluster charts and metrics.
- Couchbase cluster (process group) overview pages provide an overview of Couchbase cluster health and performance.
- This page is also helpful for identifying problematic nodes. Just select a relevant time interval for the timeline, select a node metric from the metric drop list, and compare the values of all nodes in the sortable table.
Further down the page, you’ll find a number of other cluster-specific charts.

Couchbase cluster charts

Chart	Contents
Status	Number of nodes per status (healthy, unhealthy, warmup)
Out of memory	Number of OOM and temporary OOM per sec
Operations	Number of operations
Disk fetches	Disk fetches for memcached buckets
RAM overview	Overview of cluster memory
Disk overview	Overview of cluster disk usage
Swap usage	Cluster swap usage
Cache miss rate	Percent of requests not found in the cache
Number of ejected items	Number of times that item values were ejected from memory to disk
Current items	Number of documents stored on the cluster
Buckets	Numbers of buckets per type

Couchbase node monitoring

To access valuable Couchbase node metrics:

On your Couchbase Process group details page, select a node from the Process list at the bottom of the page.
Select the Couchbase metrics tab.
Charts available on the node level include Node status, Operations, Disk fetches, RAM usage, Swap usage, and Current items.