> ## Documentation Index > Fetch the complete documentation index at: https://docs.blinkops.com/llms.txt > Use this file to discover all available pages before exploring further. # CloudWatch Logs Put Metric Filter Creates or updates a metric filter and associates it with the specified log group. Metric filters allow you to configure rules to extract metric data from log events ingested through [PutLogEvents](https://docs.aws.amazon.com/AmazonCloudWatchLogs/latest/APIReference/API_PutLogEvents.html). The maximum number of metric filters that can be associated with a log group is 100. When you create a metric filter, you can also optionally assign a unit and dimensions to the metric that is created. Metrics extracted from log events are charged as custom metrics. To prevent unexpected high charges, do not specify high-cardinality fields such as `IPAddress` or `requestID` as dimensions. Each different value found for a dimension is treated as a separate metric and accrues charges as a separate custom metric. To help prevent accidental high charges, Amazon disables a metric filter if it generates 1000 different name/value pairs for the dimensions that you have specified within a certain amount of time. You can also set up a billing alarm to alert you if your charges are higher than expected. For more information, see [Creating a Billing Alarm to Monitor Your Estimated Amazon Web Services Charges](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/monitor_estimated_charges_with_cloudwatch.html). External Documentation To learn more, visit the [AWS documentation](https://docs.aws.amazon.com/AmazonCloudWatchLogs/latest/APIReference/API_PutMetricFilter.html). ## Basic Parameters
| Parameter | Description | | ---------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | AWS Region(s) | Enter the desired AWS Region(s).

To execute the action in multiple regions, provide a comma-separated list.
For example: `us-east-1,eu-west-2`.

If you wish to run the action in all available regions, use the asterisk symbol (`*`) instead. | | Filter Name | A name for the metric filter. | | Filter Pattern | A filter pattern for extracting metric data out of ingested log events.

Input example:
\[ip, identity, user\_id, timestamp, request, status\_code, size]
| | Log Group Name | The name of the log group. | | Metric Transformations | A collection of information that defines how metric data gets emitted.

Input example:
\[
  \{
    "metricValue": "4",
    "metricNamespace": "MyApp",
    "metricName": "Volume"
  }
]

Array of MetricTransformation objects. |
## Advanced Parameters
| Parameter | Description | | -------------------------------- | ----------------------------------------------------------------------------- | | Disable XML To JSON Auto Convert | When checked, XML responses are not automatically converted into JSON format. |
## Workflow Library Example [Cloudwatch Logs Put Metric Filter with Aws and Send Results Via Email](https://library.blinkops.com/workflows/cloudwatch-logs-put-metric-filter-with-aws-and-send-results-via-email)
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