Upgrading a Minor Engine Version

Precautions

• Pay attention to patches that address issues and vulnerabilities from the open source community. When a new patch is released, install the patch in a timely manner.
• During the upgrade, your services may be intermittently interrupted. Ensure that your instance can be reconnected automatically or perform this operation during off-peak hours.
• DDL operations, such as create event, drop event, and alter event, are not allowed during the upgrade.

Constraints

• Only cluster and replica set instances support minor engine version upgrade.
• The instance version must be 3.4, 4.0, or 4.2.
• If the instance status is abnormal or the instance is being operated, the upgrade cannot be performed.
• The upgrade cannot be performed if the instance nodes are abnormal.
• Read replicas do not support minor version upgrade.

Procedure

1. Log in to the management console.
2. Click in the upper left corner and select a region and a project.
3. Click in the upper left corner of the page and choose Databases > Document Database Service.
4. On the Instances page, locate the instance you want to upgrade and click Upgrade Minor Version in the DB Engine Version column.
   Figure 2 Minor version upgrade
   

   Alternatively, click the instance. In the DB Information area on the Basic Information page, click Upgrade Minor Version in the DB Engine Version field.

   Figure 3 Minor version upgrade
   

5. In the displayed dialog box, specify Scheduled Time based on service requirements and click OK. You can view the upgrade progress on the Task Center page.
   • Minimum downtime: The upgrade has little impact on services.
   • Fastest completion: The upgrade takes a relatively short time.
   Figure 4 Selecting a scheduled time