Tair (Redis® OSS-Compatible):Instance sessions

View or terminate sessions

Limitations

You cannot retrieve sessions created in direct connection mode for instances that use the cluster architecture.

Procedure

1. Log on to the console and go to the Instances page. In the top navigation bar, select the region in which the instance that you want to manage resides. Then, find the instance and click the instance ID.

2. In the navigation pane on the left, click CloudDBA > Instance Sessions.

3. You can view or terminate the Instance Sessions of the target instance and browse the Session Statistics.

   • View sessions

     By default, the page displays detailed information for all sessions. You can hover over a column header to view its description.

     Note

     You can enter a keyword in the search box to filter sessions. To refresh the session information, click Refresh in the upper-left corner or enable Auto Refresh.

   • Terminate sessions

     Select a target session, or hold down the Shift key to select multiple sessions. Then, in the upper-right corner, click Kill Selected or Kill All.

     Warning

     This action forcibly disconnects the corresponding client. Proceed with caution.

   • View session statistics

     The Session Statistics tab displays the total number of clients, the number of active clients, and the number of sources (client addresses).

     Note

     In the statistics by source table, click the icon to the right of a client address to edit the source alias. In the Total column, click a number to view details about the connections from that source address.

Enable QPS throttling

After you enable QPS throttling, the system rejects requests that exceed the specified threshold and returns a THROTTLED error.

Usage notes

• An active throttling rule is automatically disabled if the instance is restarted, undergoes an HA switchover, or is migrated.

Prerequisites

This feature is available only for Tair (Enterprise Edition) DRAM-based instances that run in cloud-native mode and have a minor version of 25.12.2.0 or later.

Procedure

1. Log on to the console and go to the Instances page. In the top navigation bar, select the region in which the instance that you want to manage resides. Then, find the instance and click the instance ID.

2. In the navigation pane on the left, click CloudDBA > Instance Sessions.

3. On the right side of the page, click the QPS Throttling tab.

4. Click Create Throttling Rule and configure the rule parameters.

   • Throttling Mode: This parameter is fixed to Throttle by QPS.

   • Command: Select the type of traffic to throttle. Valid values are Read, Write, and All.

   • key: The key pattern to match. Both exact matches and wildcard patterns are supported. For example, user* matches all keys that have the user prefix.

   • Username: (Optional) The user account to throttle. This corresponds to an account in Account Management.

   • Client IP: (Optional) The client IP address or CIDR block to throttle.

   • Minimum request size: The minimum request size, in bytes. Requests smaller than this value are not throttled.

   • Maximum QPS: The QPS limit. If the instance uses the cluster architecture or a read/write splitting architecture, this limit applies to each shard (node). The overall QPS limit for the instance is calculated by using the following formula: maximum QPS × number of shards (nodes).

   • Throttling Duration: The duration, in minutes, for which the rule is active. The rule is automatically removed upon expiration.

5. Click Submit.

   The throttling rule is now active.

6. (Optional) You can modify the rule or disable it early.

FAQ

• Q: How do I disconnect a client?

  A: In the console, go to CloudDBA > Instance Sessions. Select the target session and click Kill Selected.