Monitor the Media CDN service

This page describes how to monitor a Media CDN service. The Media CDN Monitoring dashboard displays information that can help you monitor the performance of your Media CDN service.

For detailed information about Media CDN metrics in Metrics Explorer, including CMCD metrics, see the Google Cloud metrics page.

Open the Monitoring dashboard

To open the Monitoring dashboard, do the following:

  1. In the Google Cloud console, go to the Media CDN page.

    Go to Media CDN

  2. Click the service name.

  3. On the Details page, click the Monitoring tab.

  4. From the Continent filter list, select one or more proxy_continent values, which represent the continents of users who send requests to the service based on their GeoIP.

  5. Optional: To change the selected time period, select one of the other predefined periods on the time selector. Alternatively, click Custom and define a start time and an end time.

Summary cards

Summary cards show the aggregated values for some metrics and provide an overview of the Media CDN service. The following table briefly describes the summary cards.

Summary card Description
Total requests The total number of requests to the EdgeCacheService resource
Cache egress The cache egress count in bytes
Cache fill The cache fill count in bytes
Error rate The rate at which errors are logged


The tables show traffic volume data grouped by parameters, including client countries, proxy regions, and cache results. The data shown includes response counts and cache egress as both values and ratios.

The following table describes the parameters by which the data is grouped in these tables.

Audience The traffic volume data grouped by client_country, which is the country of the user who sends the request based on their GeoIP
Proxy regions The traffic volume data grouped by proxy_region values, which represent the country of the cache node egressing the content
Cache results summary The traffic volume data grouped by cache_result status labels such as HIT and MISS

You can work with the tables on the Monitoring page in the following ways:

  • To sort a table by a column, click the column header.

  • To filter the results, do the following:

    1. To see a list of properties, click the area next to Filter.

    2. In the list, select a property. The property name, followed by a colon, appears next to the Filter table label.

    3. To see a list of values that match the property, insert a space next to the colon, and then select a value from the list.

    4. Optional: To specify combined filters, enter the OR operator between the property-value pairs.

  • To browse through a table that spans multiple pages, use the page navigator at the lower-right corner of each table.

Metrics charts

The metrics charts show information about important metrics that help you gain insights into any issues that you might have with your Media CDN service.

The following table describes the charts that appear on the Media CDN Monitoring dashboard. The metric type strings follow the prefix

Chart Metric Description
Edge Cache egress bandwidth response_bytes_count The count of response bytes
Edge Cache request hit rate request_count The number of cache hits as a fraction of the total number of requests
Cache egress vs. cache fill bandwidth response_bytes_count,
The total response bytes egressed from the cache against the count of response bytes ingressed from the origin
Requests by response code request_count The count of requests by response_code_class
Origin requests by response code origin_request_count The count of requests to the origin by response_code_class
Top 5 error response codes request_count The count of requests by the top five response_code values
Total latencies total_latencies_by_proxy The distribution of latencies calculated from when requests were received by a proxy until the client acknowledged the proxy on the last response byte
Origin time to first byte origin_http_ttfb The distribution of latencies calculated from when the request was sent by the proxy until the response headers were received from the origin
HTTP time to first byte http_ttlb_by_client The distribution of latencies calculated from when the request was received by the proxy until the last byte of the response was sent with client location information

The toolbar on each chart card provides the following set of standard options:

  • To hide or display the legend, click .

  • To view metric values for a specific moment in the selected period, move the cursor over the chart.

  • To view a chart in full-screen mode, click . To exit full-screen mode, click Esc.

  • To zoom a chart, click the chart and drag horizontally along the x-axis. To revert the zoom operation, click . Zoom operations apply at the same time to all charts on a dashboard.

  • To view additional options, click .

    The charts offer these options:

    • Download PNG
    • Download CSV
    • Add to custom dashboard. After selecting this option, provide a name for the dashboard or select an existing custom dashboard. View and edit the dashboard by using Cloud Monitoring.
    • View in Metrics Explorer. View the metric in Metrics Explorer.