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Improve instance reliability by enabling high availability | Cloud SQL for PostgreSQL

Improve instance reliability by enabling high availability

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Preview

This feature is subject to the "Pre-GA Offerings Terms" in the General Service Terms section of the Service Specific Terms. Pre-GA features are available "as is" and might have limited support. For more information, see the launch stage descriptions.

The Cloud SQL enable-high-availability recommender proactively generates recommendations that help you bring your important instances within SLA by providing data redundancy. This might be helpful during a zonal outage or when an instance runs out of memory.

This page describes the Cloud SQL enable-high-availability recommender, how this recommender works, and how to use it.

How it works

The Cloud SQL enable-high-availability recommender analyzes the instance metadata. If the instance is configured similar to instances that support important workloads but doesn't have high availability enabled, then Cloud SQL recommends that you enable high availability for 99.95% availability SLA, or migrate to Cloud SQL Enterprise Plus edition with high availability for 99.99% availability SLA.

Note: Recommendations are generated daily. Pricing

The Cloud SQL enable-high-availability recommender is available free of cost to all Google Cloud customers. For more information, see Recommender pricing.

Before you begin

Before you can view recommendations and insights, do the following:

To get the permissions to view and work with insights and recommendations, ensure that you have the required Identity and Access Management (IAM) roles. Tasks Roles View recommendations One of these roles: recommender.cloudsqlViewer or cloudsql.viewer. Apply recommendations One of these roles: recommender.cloudsqlAdmin, cloudsql.editor, or cloudsql.admin. For more information about IAM roles, see IAM basic and predefined roles reference and Manage access to projects, folders, and organizations.
Enable the Recommender API.

Enable the API

List enable-high-availability recommendations Console

To list enable-high-availability recommendations by using the Google Cloud console, follow these steps:

Go to the Recommendation Hub.

Go to the Recommendation Hub

For more information, see Getting started with Recommendation Hub.
In the Improve reliability on Cloud SQL instances card, click View all.

gcloud

To list enable-high-availability recommendations by using gcloud CLI, run the gcloud recommender recommendations list command as follows:

gcloud recommender recommendations list \
--project=PROJECT_ID \
--location=LOCATION \
--recommender=google.cloudsql.instance.ReliabilityRecommender \
--filter=recommenderSubtype=ENABLE_HIGH_AVAILABILITY

Replace the following:

PROJECT_ID: Your project ID.
LOCATION: A region where your instances are located, such as us-central1.

API

To list enable-high-availability recommendations by using the Recommendations API, call the recommendations.list method as follows:

GET https://recommender.googleapis.com/v1beta1/projects/PROJECT-ID/locations/LOCATION/recommenders/google.cloudsql.instance.ReliabilityRecommender/recommendations

Replace the following:

PROJECT_ID: Your project ID.
LOCATION: A region where your instances are located, such as us-central1.

View insights and detailed recommendations Console

To view insights and detailed recommendations about instances that are configured similar to instances that support important workloads but don't have high availability enabled, click the recommendation link in the list of instances.

gcloud

To view insights and detailed recommendations about instances that are configured similar to instances that support important workloads but don't have high availability enabled, run the gcloud recommender insights list command as follows:

gcloud recommender insights list \
--project=PROJECT_ID \
--location=LOCATION \
--insight-type=google.cloudsql.instance.ReliabilityInsight \
--filter=insightSubtype=CRITICAL_INSTANCE_HIGH_AVAILABILITY_NOT_ENABLED

Replace the following:

PROJECT_ID: Your project ID.
LOCATION: A region where your instances are located, such as us-central1.

API

To view insights and detailed recommendations about instances that are configured similar to instances that support important workloads but don't have high availability enabled by using the Recommendations API, call the insights.list method as follows:

GET https://recommender.googleapis.com/v1beta1/projects/PROJECT-ID/locations/LOCATION/insightTypes/google.cloudsql.instance.ReliabilityInsight/insights

Replace the following:

PROJECT_ID: Your project ID.
LOCATION: A region where your instances are located, such as us-central1.

The following table lists the insight and recommendation that the Cloud SQL enable-high-availability recommender generates. The subtypes are visible in the gcloud CLI and API results.

Insight Recommendation This instance isn't highly available, even though it's configured similarly to instances that support important workloads. Single zone instances are more susceptible to downtime.
Subtype: CRITICAL_INSTANCE_HIGH_AVAILABILITY_NOT_ENABLED Enable high availability for 99.95% availability SLA, or migrate to Cloud SQL Enterprise Plus edition with high availability for even higher 99.99% availability SLA. Enabling high availability will make your instance multi-zonal, which replicates your data within a region to protect against zonal outages, limit downtime and improve recovery time.
Subtype: ENABLE_HIGH_AVAILABILITY Apply the recommendation

Evaluate the recommendation carefully and do any of the following:

To examine the instance, click View instance and do any of the following:
- Configure high availability on your instance. For more information, see Enable and disable high availability.
  Caution: Once you start the high availability configuration on an instance, you can't stop it. This operation restarts the instance and can lead to an increase in cost and a brief downtime. It typically takes only a few minutes for the configuration and the restart operation to complete. However, if the instance has a large disk or load, then it might take up to an hour.
- Migrate to the Cloud SQL Enterprise Plus edition. For more information, see Introduction to Cloud SQL editions.
To dismiss the recommendation, click Dismiss.
To close the panel without applying or dismissing the recommendation, click Cancel.

What's next

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-08-14 UTC.

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