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Amazon CloudWatch monitors your Amazon Web Services (AWS) resources and the applications you run on AWS in real time. You can use CloudWatch to collect and track metrics, which are the variables you want to measure for your resources and applications.
CloudWatch alarms send notifications or automatically change the resources you are monitoring based on rules that you define. For example, you can monitor the CPU usage and disk reads and writes of your Amazon EC2 instances. Then, use this data to determine whether you should launch additional instances to handle increased load. You can also use this data to stop under-used instances to save money.
In addition to monitoring the built-in metrics that come with AWS, you can monitor your own custom metrics. With CloudWatch, you gain system-wide visibility into resource utilization, application performance, and operational health.
If you’re using the service, you’re probably looking for CloudWatchClient and CloudWatch.
Structs
Represents the history of a specific alarm.
An anomaly detection model associated with a particular CloudWatch metric and statistic. You can use the model to display a band of expected normal values when the metric is graphed.
The configuration specifies details about how the anomaly detection model is to be trained, including time ranges to exclude from use for training the model and the time zone to use for the metric.
A client for the CloudWatch API.
The details about a composite alarm.
Represents a specific dashboard.
An error or warning for the operation.
Encapsulates the statistical data that CloudWatch computes from metric data.
A dimension is a name/value pair that is part of the identity of a metric. You can assign up to 10 dimensions to a metric. Because dimensions are part of the unique identifier for a metric, whenever you add a unique name/value pair to one of your metrics, you are creating a new variation of that metric.
Represents filters for a dimension.
This structure contains the definition for a Contributor Insights rule.
One of the unique contributors found by a Contributor Insights rule. If the rule contains multiple keys, then a unique contributor is a unique combination of values from all the keys in the rule.
If the rule contains a single key, then each unique contributor is each unique value for this key.
For more information, see GetInsightRuleReport.
One data point related to one contributor.
For more information, see GetInsightRuleReport and InsightRuleContributor.
One data point from the metric time series returned in a Contributor Insights rule report.
For more information, see GetInsightRuleReport.
This structure includes the Timezone
parameter, which you can use to specify your time zone so that the labels that are associated with returned metrics display the correct time for your time zone.
The Timezone
value affects a label only if you have a time-based dynamic expression in the label. For more information about dynamic expressions in labels, see Using Dynamic Labels.
A message returned by the GetMetricData
API, including a code and a description.
Represents a specific metric.
The details about a metric alarm.
This structure is used in both GetMetricData
and PutMetricAlarm
. The supported use of this structure is different for those two operations.
When used in GetMetricData
, it indicates the metric data to return, and whether this call is just retrieving a batch set of data for one metric, or is performing a math expression on metric data. A single GetMetricData
call can include up to 500 MetricDataQuery
structures.
When used in PutMetricAlarm
, it enables you to create an alarm based on a metric math expression. Each MetricDataQuery
in the array specifies either a metric to retrieve, or a math expression to be performed on retrieved metrics. A single PutMetricAlarm
call can include up to 20 MetricDataQuery
structures in the array. The 20 structures can include as many as 10 structures that contain a MetricStat
parameter to retrieve a metric, and as many as 10 structures that contain the Expression
parameter to perform a math expression. Of those Expression
structures, one must have True
as the value for ReturnData
. The result of this expression is the value the alarm watches.
Any expression used in a PutMetricAlarm
operation must return a single time series. For more information, see Metric Math Syntax and Functions in the Amazon CloudWatch User Guide.
Some of the parameters of this structure also have different uses whether you are using this structure in a GetMetricData
operation or a PutMetricAlarm
operation. These differences are explained in the following parameter list.
A GetMetricData
call returns an array of MetricDataResult
structures. Each of these structures includes the data points for that metric, along with the timestamps of those data points and other identifying information.
Encapsulates the information sent to either create a metric or add new values to be aggregated into an existing metric.
This structure defines the metric to be returned, along with the statistics, period, and units.
This structure contains the configuration information about one metric stream.
This structure contains the name of one of the metric namespaces that is listed in a filter of a metric stream.
This array is empty if the API operation was successful for all the rules specified in the request. If the operation could not process one of the rules, the following data is returned for each of those rules.
Specifies one range of days or times to exclude from use for training an anomaly detection model.
Represents a set of statistics that describes a specific metric.
A key-value pair associated with a CloudWatch resource.
Enums
Errors returned by DeleteAlarms
Errors returned by DeleteAnomalyDetector
Errors returned by DeleteDashboards
Errors returned by DeleteInsightRules
Errors returned by DeleteMetricStream
Errors returned by DescribeAlarmHistory
Errors returned by DescribeAlarms
Errors returned by DescribeAlarmsForMetric
Errors returned by DescribeAnomalyDetectors
Errors returned by DescribeInsightRules
Errors returned by DisableAlarmActions
Errors returned by DisableInsightRules
Errors returned by EnableAlarmActions
Errors returned by EnableInsightRules
Errors returned by GetDashboard
Errors returned by GetInsightRuleReport
Errors returned by GetMetricData
Errors returned by GetMetricStatistics
Errors returned by GetMetricStream
Errors returned by GetMetricWidgetImage
Errors returned by ListDashboards
Errors returned by ListMetricStreams
Errors returned by ListMetrics
Errors returned by ListTagsForResource
Errors returned by PutAnomalyDetector
Errors returned by PutCompositeAlarm
Errors returned by PutDashboard
Errors returned by PutInsightRule
Errors returned by PutMetricAlarm
Errors returned by PutMetricData
Errors returned by PutMetricStream
Errors returned by SetAlarmState
Errors returned by StartMetricStreams
Errors returned by StopMetricStreams
Errors returned by TagResource
Errors returned by UntagResource
Traits
Trait representing the capabilities of the CloudWatch API. CloudWatch clients implement this trait.