AWS CLI Command Reference

[ aws . pi ]

describe-dimension-keys

Description

For a specific time period, retrieve the top N dimension keys for a metric.

Note

Each response element returns a maximum of 500 bytes. For larger elements, such as SQL statements, only the first 500 bytes are returned.

See also: AWS API Documentation

See ‘aws help’ for descriptions of global parameters.

Synopsis

  describe-dimension-keys
--service-type <value>
--identifier <value>
--start-time <value>
--end-time <value>
--metric <value>
[--period-in-seconds <value>]
--group-by <value>
[--partition-by <value>]
[--filter <value>]
[--max-results <value>]
[--next-token <value>]
[--cli-input-json | --cli-input-yaml]
[--generate-cli-skeleton <value>]

Options

--service-type (string)

The AWS service for which Performance Insights will return metrics. The only valid value for ServiceType is RDS .

Possible values:

  • RDS

--identifier (string)

An immutable, AWS Region-unique identifier for a data source. Performance Insights gathers metrics from this data source.

To use an Amazon RDS instance as a data source, you specify its DbiResourceId value. For example, specify db-FAIHNTYBKTGAUSUZQYPDS2GW4A

--start-time (timestamp)

The date and time specifying the beginning of the requested time series data. You must specify a StartTime within the past 7 days. The value specified is inclusive , which means that data points equal to or greater than StartTime are returned.

The value for StartTime must be earlier than the value for EndTime .

--end-time (timestamp)

The date and time specifying the end of the requested time series data. The value specified is exclusive , which means that data points less than (but not equal to) EndTime are returned.

The value for EndTime must be later than the value for StartTime .

--metric (string)

The name of a Performance Insights metric to be measured.

Valid values for Metric are:

  • db.load.avg - a scaled representation of the number of active sessions for the database engine.

  • db.sampledload.avg - the raw number of active sessions for the database engine.

If the number of active sessions is less than an internal Performance Insights threshold, db.load.avg and db.sampledload.avg are the same value. If the number of active sessions is greater than the internal threshold, Performance Insights samples the active sessions, with db.load.avg showing the scaled values, db.sampledload.avg showing the raw values, and db.sampledload.avg less than db.load.avg . For most use cases, you can query db.load.avg only.

--period-in-seconds (integer)

The granularity, in seconds, of the data points returned from Performance Insights. A period can be as short as one second, or as long as one day (86400 seconds). Valid values are:

  • 1 (one second)

  • 60 (one minute)

  • 300 (five minutes)

  • 3600 (one hour)

  • 86400 (twenty-four hours)

If you don’t specify PeriodInSeconds , then Performance Insights chooses a value for you, with a goal of returning roughly 100-200 data points in the response.

--group-by (structure)

A specification for how to aggregate the data points from a query result. You must specify a valid dimension group. Performance Insights returns all dimensions within this group, unless you provide the names of specific dimensions within this group. You can also request that Performance Insights return a limited number of values for a dimension.

Group -> (string)

The name of the dimension group. Valid values are:

  • db - The name of the database to which the client is connected (only Aurora PostgreSQL, RDS PostgreSQL, Aurora MySQL, RDS MySQL, and MariaDB)

  • db.application - The name of the application that is connected to the database (only Aurora PostgreSQL and RDS PostgreSQL)

  • db.host - The host name of the connected client (all engines)

  • db.session_type - The type of the current session (only Aurora PostgreSQL and RDS PostgreSQL)

  • db.sql - The SQL that is currently executing (all engines)

  • db.sql_tokenized - The SQL digest (all engines)

  • db.wait_event - The event for which the database backend is waiting (all engines)

  • db.wait_event_type - The type of event for which the database backend is waiting (all engines)

  • db.user - The user logged in to the database (all engines)

Dimensions -> (list)

A list of specific dimensions from a dimension group. If this parameter is not present, then it signifies that all of the dimensions in the group were requested, or are present in the response.

Valid values for elements in the Dimensions array are:

  • db.application.name - The name of the application that is connected to the database (only Aurora PostgreSQL and RDS PostgreSQL)

  • db.host.id - The host ID of the connected client (all engines)

  • db.host.name - The host name of the connected client (all engines)

  • db.name - The name of the database to which the client is connected (only Aurora PostgreSQL, RDS PostgreSQL, Aurora MySQL, RDS MySQL, and MariaDB)

  • db.session_type.name - The type of the current session (only Aurora PostgreSQL and RDS PostgreSQL)

  • db.sql.id - The SQL ID generated by Performance Insights (all engines)

  • db.sql.db_id - The SQL ID generated by the database (all engines)

  • db.sql.statement - The SQL text that is being executed (all engines)

  • db.sql.tokenized_id

  • db.sql_tokenized.id - The SQL digest ID generated by Performance Insights (all engines)

  • db.sql_tokenized.db_id - SQL digest ID generated by the database (all engines)

  • db.sql_tokenized.statement - The SQL digest text (all engines)

  • db.user.id - The ID of the user logged in to the database (all engines)

  • db.user.name - The name of the user logged in to the database (all engines)

  • db.wait_event.name - The event for which the backend is waiting (all engines)

  • db.wait_event.type - The type of event for which the backend is waiting (all engines)

  • db.wait_event_type.name - The name of the event type for which the backend is waiting (all engines)

(string)

Limit -> (integer)

The maximum number of items to fetch for this dimension group.

Shorthand Syntax:

Group=string,Dimensions=string,string,Limit=integer

JSON Syntax:

{
  "Group": "string",
  "Dimensions": ["string", ...],
  "Limit": integer
}

--partition-by (structure)

For each dimension specified in GroupBy , specify a secondary dimension to further subdivide the partition keys in the response.

Group -> (string)

The name of the dimension group. Valid values are:

  • db - The name of the database to which the client is connected (only Aurora PostgreSQL, RDS PostgreSQL, Aurora MySQL, RDS MySQL, and MariaDB)

  • db.application - The name of the application that is connected to the database (only Aurora PostgreSQL and RDS PostgreSQL)

  • db.host - The host name of the connected client (all engines)

  • db.session_type - The type of the current session (only Aurora PostgreSQL and RDS PostgreSQL)

  • db.sql - The SQL that is currently executing (all engines)

  • db.sql_tokenized - The SQL digest (all engines)

  • db.wait_event - The event for which the database backend is waiting (all engines)

  • db.wait_event_type - The type of event for which the database backend is waiting (all engines)

  • db.user - The user logged in to the database (all engines)

Dimensions -> (list)

A list of specific dimensions from a dimension group. If this parameter is not present, then it signifies that all of the dimensions in the group were requested, or are present in the response.

Valid values for elements in the Dimensions array are:

  • db.application.name - The name of the application that is connected to the database (only Aurora PostgreSQL and RDS PostgreSQL)

  • db.host.id - The host ID of the connected client (all engines)

  • db.host.name - The host name of the connected client (all engines)

  • db.name - The name of the database to which the client is connected (only Aurora PostgreSQL, RDS PostgreSQL, Aurora MySQL, RDS MySQL, and MariaDB)

  • db.session_type.name - The type of the current session (only Aurora PostgreSQL and RDS PostgreSQL)

  • db.sql.id - The SQL ID generated by Performance Insights (all engines)

  • db.sql.db_id - The SQL ID generated by the database (all engines)

  • db.sql.statement - The SQL text that is being executed (all engines)

  • db.sql.tokenized_id

  • db.sql_tokenized.id - The SQL digest ID generated by Performance Insights (all engines)

  • db.sql_tokenized.db_id - SQL digest ID generated by the database (all engines)

  • db.sql_tokenized.statement - The SQL digest text (all engines)

  • db.user.id - The ID of the user logged in to the database (all engines)

  • db.user.name - The name of the user logged in to the database (all engines)

  • db.wait_event.name - The event for which the backend is waiting (all engines)

  • db.wait_event.type - The type of event for which the backend is waiting (all engines)

  • db.wait_event_type.name - The name of the event type for which the backend is waiting (all engines)

(string)

Limit -> (integer)

The maximum number of items to fetch for this dimension group.

Shorthand Syntax:

Group=string,Dimensions=string,string,Limit=integer

JSON Syntax:

{
  "Group": "string",
  "Dimensions": ["string", ...],
  "Limit": integer
}

--filter (map)

One or more filters to apply in the request. Restrictions:

  • Any number of filters by the same dimension, as specified in the GroupBy or Partition parameters.

  • A single filter for any other dimension in this dimension group.

key -> (string)

value -> (string)

Shorthand Syntax:

KeyName1=string,KeyName2=string

JSON Syntax:

{"string": "string"
  ...}

--max-results (integer)

The maximum number of items to return in the response. If more items exist than the specified MaxRecords value, a pagination token is included in the response so that the remaining results can be retrieved.

--next-token (string)

An optional pagination token provided by a previous request. If this parameter is specified, the response includes only records beyond the token, up to the value specified by MaxRecords .

--cli-input-json | --cli-input-yaml (string) Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally. This may not be specified along with --cli-input-yaml.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See ‘aws help’ for descriptions of global parameters.

Examples

To describe dimension keys

This example requests the names of all wait events. The data is summarized by event name, and the aggregate values of those events over the specified time period.

Command:

aws pi describe-dimension-keys --service-type RDS --identifier db-LKCGOBK26374TPTDFXOIWVCPPM --start-time 1527026400 --end-time 1527080400 --metric db.load.avg --group-by '{"Group":"db.wait_event"}'

Output:

{
    "AlignedEndTime": 1.5270804E9,
    "AlignedStartTime": 1.5270264E9,
    "Keys": [
        {
            "Dimensions": {"db.wait_event.name": "wait/synch/mutex/innodb/aurora_lock_thread_slot_futex"},
            "Total": 0.05906906851195666
        },
        {
            "Dimensions": {"db.wait_event.name": "wait/io/aurora_redo_log_flush"},
            "Total": 0.015824722186149193
        },
        {
            "Dimensions": {"db.wait_event.name": "CPU"},
            "Total": 0.008014396230265477
        },
        {
            "Dimensions": {"db.wait_event.name": "wait/io/aurora_respond_to_client"},
            "Total": 0.0036361612526204477
        },
        {
            "Dimensions": {"db.wait_event.name": "wait/io/table/sql/handler"},
            "Total": 0.0019108398419382965
        },
        {
            "Dimensions": {"db.wait_event.name": "wait/synch/cond/mysys/my_thread_var::suspend"},
            "Total": 8.533847837782684E-4
        },
        {
            "Dimensions": {"db.wait_event.name": "wait/io/file/csv/data"},
            "Total": 6.864181956477376E-4
        },
        {
            "Dimensions": {"db.wait_event.name": "Unknown"},
            "Total": 3.895887056379051E-4
        },
        {
            "Dimensions": {"db.wait_event.name": "wait/synch/mutex/sql/FILE_AS_TABLE::LOCK_shim_lists"},
            "Total": 3.710368625122906E-5
        },
        {
            "Dimensions": {"db.wait_event.name": "wait/lock/table/sql/handler"},
            "Total": 0
        }
    ]
}

Output

AlignedStartTime -> (timestamp)

The start time for the returned dimension keys, after alignment to a granular boundary (as specified by PeriodInSeconds ). AlignedStartTime will be less than or equal to the value of the user-specified StartTime .

AlignedEndTime -> (timestamp)

The end time for the returned dimension keys, after alignment to a granular boundary (as specified by PeriodInSeconds ). AlignedEndTime will be greater than or equal to the value of the user-specified Endtime .

PartitionKeys -> (list)

If PartitionBy was present in the request, PartitionKeys contains the breakdown of dimension keys by the specified partitions.

(structure)

If PartitionBy was specified in a DescribeDimensionKeys request, the dimensions are returned in an array. Each element in the array specifies one dimension.

Dimensions -> (map)

A dimension map that contains the dimension(s) for this partition.

key -> (string)

value -> (string)

Keys -> (list)

The dimension keys that were requested.

(structure)

An array of descriptions and aggregated values for each dimension within a dimension group.

Dimensions -> (map)

A map of name-value pairs for the dimensions in the group.

key -> (string)

value -> (string)

Total -> (double)

The aggregated metric value for the dimension(s), over the requested time range.

Partitions -> (list)

If PartitionBy was specified, PartitionKeys contains the dimensions that were.

(double)

NextToken -> (string)

An optional pagination token provided by a previous request. If this parameter is specified, the response includes only records beyond the token, up to the value specified by MaxRecords .

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