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    [July 25, 2023] Adding Rate Limits on Shared CLB Instances

    Last updated: 2024-01-04 09:44:16
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      Tencent Cloud plans to add rate limits on shared CLB instances. For new users, the rate limits take effect starting from 12:00:00, July 25, 2023 (UTC+8). For existing users, the rate limits take effect starting from 12:00:00, August 25, 2023 (UTC+8). Please check the performance metrics of your share CLBs and make adjustments if necessary before the effective date of the service adjustment.
      If you have any questions, please submit a ticket.
      User type
      Description
      Metric quota
      Before adjustment
      After adjustment
      Effective time
      New users
      Users who do not have any shared CLB instances under their root accounts by 12:00:00, July 25, 2023 (UTC+8).
      50,000 concurrent connections
      5,000 new connections per second
      5,000 QPS
      N/A
      Apply rate limits based on the instance specifications
      12:00:00, July 25, 2023 (UTC+8)
      Existing users
      Users who have shared CLB instances under their root accounts by 12:00:00, July 25, 2023 (UTC+8).
      To meet the excess performance requirement, a shared CLB instance takes extra resources from the shared cluster, which may cause performance preemption.
      12:00:00, August 25, 2023 (UTC+8)
      Suggestions
      Method 1: Upgrade the shared instance to an LCU-supported instance. See Upgrading to LCU-supported Instance.
      Method 2: Create more CLBs to distribute the traffic. See Creating a CLB instance.

      FAQs

      ‍Where can I check the performance of my shared CLBs?

      You can check the monitoring data, set alerts to get notifications or add the CLB to Tencent Smart Advisor.
      Method 1: Check monitoring data ‍in the console or configure alert policies.
      ‍Shared CLB ‍metrics and CLB instance-based monitoring/alert metrics
      ‍Shared CLB ‍metrics
      CLB instance-based monitoring/alert metrics
      Max concurrent connections
      Client-to-CLB concurrent connections (ClientConcurConn): Number of concurrent connections initiated from the client to the CLB or listener
      Number of new connections per second
      Client-to-CLB new connections (ClientNewConn): Number of new connections initiated from the client to the CLB or listener
      Queries per Second (QPS)
      Requests per second (TotalReq): Number of requests per second of a CLB instance This metric only available for layer-7 listeners.
      Method 2: Add the shared CLB instance to Tencent Smart Advisor, which supports rate limit checking.
      ‍Go ‍to the Tencent Smart Advisor console.‍

      I ‍am using ‍shared CLBs now. If I create a shared CLB after 12:00 PM, July 25, 2023 (UTC+8). Is it affected by the rate limits?

      ‍If you create shared CLBs between 12:00:00 PM, July 25 to 12:00:00 PM, August 25, 2023 (UTC+8), these shared CLB instances are not affected by the rate limit.
      After that, all shared CLB instances under your account are subject to rate limits regardless of their creation time.

      Why are there rate limits on shared CLB instances?

      To meet the excess performance requirement, a shared CLB instance takes extra resources from the shared cluster, which may cause performance preemption. The performance of CLB instances and clusters will be affected. The rate limit is to ensure the stability of load balancing service. Your services will not be affected if your performance requirements are within the range of 50,000 concurrent connections, 5,000 new connections per second and 5,000 QPS.
      If you require higher performance, please upgrade to LCU-supported instances. For more information, see Upgrading to LCU-supported Instances.

      What if I don't want to use shared CLBs anymore?

      For monthly-subscribed CLBS, you can delete instances directly.
      
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