User guide

DescriptionMetric
The number of database connections to a cluster.
Units: Count
Dimensions: ClusterIdentifier
DatabaseConnec-
tions
Indicates the health of the cluster. Every minute the cluster connects to its
database and performs a simple query. If it is able to perform this operation
successfully, the cluster is considered healthy. Otherwise, the cluster is un-
healthy. An unhealthy status can occur when the cluster database is under
extremely heavy load or if there is a configuration problem with a database
on the cluster. The exception to this is when the cluster is undergoing main-
tenance. Even though your cluster might be unavailable due to maintenance
tasks, the cluster remains in HEALTHY state. For more information, see
Maintenance Windows in the Amazon Redshift Cluster Management Guide.
Note
In Amazon CloudWatch this metric is reported as 1 or 0 whereas in
the Amazon Redshift console, this metric is displayed with the words
HEALTHY or UNHEALTHY for convenience. When this metric is dis-
played in the Amazon Redshift console, sampling averages are ig-
nored and only HEALTHY or UNHEALTHY are displayed. In Amazon
CloudWatch, values different than 1 and 0 may occur because of
sampling issue. Any value below 1 for HealthStatus is reported
as 0 (UNHEALTHY).
Units: 1/0 (HEALTHY/UNHEALTHY in the Amazon Redshift console)
Dimensions: ClusterIdentifier
HealthStatus
Indicates whether the cluster is in maintenance mode.
Note
In Amazon CloudWatch this metric is reported as 1 or 0 whereas in
the Amazon Redshift console, this metric is displayed with the words
ON or OFF for convenience. When this metric is displayed in the
Amazon Redshift console, sampling averages are ignored and only
ON or OFF are displayed. In Amazon CloudWatch, values different
than 1 and 0 may occur because of sampling issues. Any value
greater than 0 for MaintenanceMode is reported as 1 (ON).
Units: 1/0 (ON/OFF in the Amazon Redshift console).
Dimensions: ClusterIdentifier
MaintenanceMode
The rate at which the node or cluster receives data.
Units: Bytes/seconds (MB/s in the Amazon Redshift console)
Dimensions: NodeID, ClusterIdentifier
NetworkReceiv-
eThroughput
The rate at which the node or cluster writes data.
Units: Bytes/second (MB/s in the Amazon Redshift console)
Dimensions: NodeID, ClusterIdentifier
NetworkTransmit-
Throughput
API Version 2012-12-01
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Amazon Redshift Management Guide
Amazon Redshift CloudWatch Metrics