Viewing and Downloading Slow Query Logs

Scenarios

RDS supports the following statement types:

• All statement types
• SELECT
• INSERT
• UPDATE
• DELETE
• CREATE

Viewing Log Details

1. Log in to the management console.
2. Click in the upper left corner and select a region and a project.
3. Click Service List. Under Database, click Relational Database Service.
4. On the Instances page, click the target DB instance.
5. In the navigation pane on the left, choose Logs. On the Slow Query Logs page, click Log Details to view details about slow query logs.
   Note

   • You can view the slow query log records of a specified execution statement type or a specific time period.
   • Only SELECT statements return the number of result rows. The number of result rows for the INSERT, UPDATE, DELETE, and CREATE statements is 0 by default.
   • Slow query logs only record executed statements whose execution duration exceeds the threshold.
   • The long_query_time parameter determines when a slow query log is recorded. However, changes to this parameter do not affect already recorded logs. If long_query_time is changed from 1s to 0.1s, RDS starts recording statements that meet the new threshold and still displays the previously recorded logs that do not meet the new threshold. For example, a 1.5s SQL statement that was recorded when the threshold was 1s will not be deleted now that the new threshold is 2s.
   • A maximum of 2,000 slow log records can be displayed.

Downloading a Slow Query Log

1. Log in to the management console.
2. Click in the upper left corner and select a region and a project.
3. Click Service List. Under Database, click Relational Database Service.
4. On the Instances page, click the target DB instance.
5. In the navigation pane on the left, choose Logs. On the Slow Query Logs page, click Downloads. In the log list, locate a log whose status is Preparation completed and click Download in the Operation column.
   • The system automatically loads the downloading preparation tasks. The loading duration is determined by the log file size and network environment.
     • When the log is being prepared for download, the log status is Preparing.
     • When the log is ready for download, the log status is Preparation completed.
     • If the preparation for download fails, the log status is Abnormal.

     Logs in the Preparing or Abnormal status cannot be downloaded.

   • The download link is valid for 5 minutes. After the download link expires, a message is displayed indicating that the download link has expired. If you need to redownload the log, click OK.
   • The downloaded log file contains only the logs of the primary node.

Enabling Slow Log Reporting to LTS

1. Log in to the management console.
2. Click in the upper left corner and select a region and a project.
3. Click Service List. Under Database, click Relational Database Service.
4. On the Instances page, click the target DB instance name.
5. In the navigation pane, click Logs. On the Slow Query Logs page, click Log Details.
6. Click next to Report Slow Logs to LTS.
7. Select an LTS log group and log stream and click OK.