The Changefeeds dashboard in the CockroachDB Admin UI lets you monitor the changefeeds created across your cluster. To view this dashboard, access the Admin UI, click Metrics on the left-hand navigation bar, and then select Dashboard > Changefeeds.

The Changefeeds dashboard displays the following time series graphs:

Max Changefeed Latency

CockroachDB Admin UI Max Changefeed Latency graph

  • In the node view, the graph shows the maximum latency for resolved timestamps of any running changefeed for the node.

  • In the cluster view, the graph shows the maximum latency for resolved timestamps of any running changefeed across all nodes.

Note:

The maximum latency for resolved timestamps is distinct from and slower than the commit-to-emit latency for individual change messages. For more information about resolved timestamps, see Ordering guarantees.

Sink Byte Traffic

CockroachDB Admin UI Sink Byte Traffic graph

  • In the node view, the graph shows the number of bytes emitted by CockroachDB into the sink across all changefeeds for the selected node.

  • In the cluster view, the graph shows the number of bytes emitted by CockroachDB into the sink across all changefeeds and across all nodes in the cluster.

On hovering over the graph, the values for the following metrics are displayed:

Metric Description
Emitted Bytes The number of bytes emitted by CockroachDB into the sink for all changefeeds.

Sink Counts

CockroachDB Admin UI Sink Counts graph

  • In the node view, the graph shows the number of messages that CockroachDB sent to the sink as well as the number of flushes that the sink performed for all changefeeds.

  • In the cluster view, the graph shows the number of messages that CockroachDB sent to the sink as well as the number of flushes that the sink performed for all changefeeds across the cluster.

On hovering over the graph, the values for the following metrics are displayed:

Metric Description
Messages The number of messages that CockroachDB sent to the sink for all changefeeds.
Flushes The the number of flushes that the sink performed for all changefeeds.

Sink Timings

CockroachDB Admin UI Sink Timings graph

  • In the node view, the graph shows the time in milliseconds per second required by CockroachDB to send messages to the sink as well as the time CockroachDB spent waiting for the sink to flush the messages for all changefeeds.

  • In the cluster view, the graph shows the time in milliseconds per second required by CockroachDB to send messages to the sink as the time CockroachDB spent waiting for the sink to flush the messages for all changefeeds across the cluster.

On hovering over the graph, the values for the following metrics are displayed:

Metric Description
Message Emit Time The time in milliseconds per second required by CockroachDB to send messages to the sink for all changefeeds.
Flush Time The time in milliseconds per second that CockroachDB spent waiting for the sink to flush the messages for all changefeeds.

See also



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