BRIN (Block Range INdex) is a type of index in Postgres that is used for large tables with a large number of rows and a high degree of clustering. BRIN is an efficient way to store and retrieve data from tables that have a large number of rows and a high degree of clustering.
BRIN wins when:
- The data is stored in a large table with a large number of rows.
- The data is highly clustered, meaning that the data is stored in blocks that are frequently used together.
- The queries being performed on the data are range-based, meaning that they are looking for data within a specific range of values.
- The table size is too large to store an index in memory, so an index that can be partially stored on disk is necessary.
- The data is stored in large blocks, making it difficult for a traditional index to provide efficient access to the data.
In conclusion, BRIN is most effective when the data is stored in large tables with a large number of rows and a high degree of clustering, and the queries being performed on the data are range-based.
