Amazon Redshift introduces query identifiers for improved query performance monitoring
News
The article introduces a new feature in Amazon Redshift called "query hash", which assigns a unique identifier to SQL queries to improve query performance monitoring.
Specifically, the article covers:
- Query hash is a unique signature generated for executed queries on a Redshift data warehouse
- It allows investigating query performance through trend analysis or comparing performance across time periods
- It adds two new columns to the SYS_QUERY_HISTORY view: user_query_hash (with literals) and generic_query_hash (without literals)
- Query hash is now generally available for both provisioned and Serverless Redshift data warehouses across all supported AWS regions
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