Help Center/ Distributed Cache Service/ User Guide/ Diagnosing and Analyzing an Instance/ Viewing Slow Queries of a DCS Redis Instance
Updated on 2024-12-12 GMT+08:00
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Viewing Slow Queries of a DCS Redis Instance

Redis logs queries that exceed a specified execution time. You can view the slow logs on the DCS console to identify performance issues.

For details about the commands, visit the Redis official website.

Configure slow queries with the following parameters:

  • slowlog-log-slower-than: The maximum time allowed, in microseconds, for command execution. If this threshold is exceeded, Redis will log the command. The default value is 10,000. That is, if command execution exceeds 10 ms, the command will be logged.
  • slowlog-max-len: The number of slow queries in a record. The default value is 128, which means a maximum of 128 latest slow queries can be displayed.

For details about the configuration parameters, see Modifying Configuration Parameters of a DCS Instance.

Notes and Constraints

  • Currently, you can view slow queries in the last seven days.
  • After restarting an instance, slow queries before the restart cannot be viewed.

Procedure

  1. Log in to the management console, and choose Application > Distributed Cache Service in the service list.
  2. Click in the upper left corner of the management console and select the region where your instance is located.
  3. In the navigation pane, choose Cache Manager.
  4. Click the name of a DCS instance.
  5. Choose Analysis and Diagnosis > Slow Queries.
  6. Select a start date and an end date and click the refresh icon to view slow queries within the specified period. For details about the commands, visit the Redis official website.

    To filter slow queries, click the filtering bar, select a property or enter a keyword.

    Figure 1 Slow queries of an instance

  7. To download slow queries, choose Export > Export all data to an XLSX file or Export selected data to an XLSX file.