[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC):2025-08-19。"],[[["\u003cp\u003eThis document provides instructions on how to view performance metrics for Persistent Disk Asynchronous Replication using Cloud Monitoring.\u003c/p\u003e\n"],["\u003cp\u003eYou can monitor the \u003ccode\u003eAsync replication sent bytes count\u003c/code\u003e metric to track the number of bytes sent through the cross-region network, which affects replication speed.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eAsync replication time since last replication\u003c/code\u003e metric allows you to monitor the Recovery Point Objective (RPO) by tracking the time in seconds since the last replication.\u003c/p\u003e\n"],["\u003cp\u003eBoth metrics require you to filter by project ID and disk ID within the Cloud Monitoring Metrics Explorer to view relevant data.\u003c/p\u003e\n"],["\u003cp\u003eThe content includes step-by-step instructions on how to set up the needed filters and alignement functions within the Metrics explorer to monitor both sent byte count and the RPO.\u003c/p\u003e\n"]]],[],null,["# Review Asynchronous Replication performance\n\n*** ** * ** ***\n\nThis document describes how to view performance metrics for\nAsynchronous Replication.\n\nTo learn more about Asynchronous Replication, see\n[About Asynchronous Replication](/compute/docs/disks/async-pd/about#performance).\n\nMetrics\n-------\n\nYou can view the following Asynchronous Replication metrics in\n[Cloud Monitoring](/monitoring/docs/monitoring-overview):\n\nMonitor sent byte counts\n------------------------\n\nUse the **Async replication sent bytes count** metric to graph the average\nnumber of byte sent, sampled every minute. The number of sent bytes represents\nthe data your workload writes to block storage, which affects the speed of\nreplication.\n\n1. In the Google Cloud console, go to the\n **Cloud Monitoring \\\u003e Metrics Explorer** page.\n\n [Go to the Metrics Explorer page](https://console.cloud.google.com/monitoring/metrics-explorer)\n2. In the **Select a metric** section, click the **Metric** menu.\n\n3. Select **Disk** (`disk`).\n\n4. Select the **Disk** active metric category list, and then select\n **Async replication sent bytes count**\n (`disk/async_replication/sent_bytes_count`).\n\n5. Click **Apply**.\n\n6. In the **Transform** menu, select one of the following:\n\n - To view the total number of sent bytes, select **None**.\n - To view the number of bytes sent per second, select **Rate**.\n7. In the **Filters** section, do the following:\n\n 1. Click **Add filter**.\n 2. Click inside the **Label** box to view the list of available labels. Under the heading **Resource labels** , select **project_id** . Leave the **Comparison** value set to `= (equals)`. In the **Value** field, type or select your project ID. Click **Done**.\n 3. Click **Add filter**.\n 4. In the **Label** box, select **disk_id** . Leave the **Comparison** value set to `= (equals)`. In the **Value** field, type or select the ID of the primary disk that is replicating.\n 5. Click **Done**.\n8. Click **More options**.\n\n9. In the **Alignment function** menu select an alignment function. The\n **Mean** alignment function shows the average number of bytes sent per minute,\n while the **Max** alignment function shows the highest number of bytes sent\n per minute.\n\n10. In the **Min alignment period** menu, select an alignment\n period. The alignment period must be at least one minute.\n\nMonitor RPO\n-----------\n\nUse the **Async replication time since last replication** metric to graph the\nnumber of seconds since the last replication was done (RPO).\n\n1. In the Google Cloud console, go to the\n **Cloud Monitoring \\\u003e Metrics Explorer** page.\n\n [Go to the Metrics Explorer page](https://console.cloud.google.com/monitoring/metrics-explorer)\n2. On the **Metrics Explorer** page, click **Add query**.\n\n3. In the **Select a metric** section, click the **Metric** menu.\n\n4. Select **Disk** (`disk`).\n\n5. Select the **Disk** active metric category list, and then select\n **Async replication time since last replication**\n (`disk/async_replication/time_since_last_replication`).\n\n6. Click **Apply**.\n\n7. In the **Filters** section, add filters for your project ID and disk ID:\n\n 1. Click **Add filter**.\n 2. Click inside the **Label** box to view the list of available labels. Under the heading **Resource labels** , select **project_id** . Leave the **Comparison** value set to `= (equals)`. In the **Value** field, type or select your project ID. Click **Done**.\n 3. Click **Add filter**.\n 4. In the **Label** box, select **disk_id** . Leave the **Comparison** value set to `= (equals)`. In the **Value** field, type or select the ID of the primary disk that is replicating.\n 5. Click **Done**.\n8. Click **More options**.\n\n9. In the **Alignment function** menu, select an alignment function. The\n **Mean** alignment function shows the average number of seconds since the last\n replication was done , while the **Max** alignment function shows the highest\n number of seconds since the last replication was done .\n\n10. In the **Min alignment period** menu, select the select an alignment\n period. The alignment period must be at least one minute.\n\n11. Optional: Save the chart.\n\nWhat's next\n-----------\n\n- Learn how to customize Asynchronous Replication chats with [Metrics Explorer](/monitoring/charts/metrics-explorer).\n- Learn more about [Asynchronous Replication](/compute/docs/disks/async-pd/about)."]]