Accessing more SQL text in the Performance Insights dashboard
By default, each row in the Top SQL table shows 500 bytes of SQL text for each SQL statement.
When a SQL statement exceeds 500 bytes, you can view more text in the SQL text section below the Top SQL table. In this case, the maximum length for the text displayed in SQL text is 4 KB. This limit is introduced by the console and is subject to the limits set by the database engine. To save the text shown in SQL text, choose Download.
Topics
Text size limits for Amazon RDS engines
When you download SQL text, the database engine determines its maximum length. You can download SQL text up to the following per-engine limits.
| DB engine | Maximum length of downloaded text |
|---|---|
| Amazon RDS for MySQL and MariaDB | 1,024 bytes |
| Amazon RDS for Microsoft SQL Server | 4,096 characters |
| Amazon RDS for Oracle | 1,000 bytes |
The SQL text section of the Performance Insights console displays up to the maximum that the engine returns. For example, if MySQL returns at most 1 KB to Performance Insights, it can only collect and show 1 KB, even if the original query is larger. Thus, when you view the query in SQL text or download it, Performance Insights returns the same number of bytes.
If you use the AWS CLI or API, Performance Insights doesn't have the 4 KB limit enforced by the console.
DescribeDimensionKeys and GetResourceMetrics return at most 500 bytes.
Note
GetDimensionKeyDetails returns the full query, but the size is subject to the engine limit.
