In this latest episode, Tony and Toney discuss PostgreSQL's buffer cache hit ratio (BCHR), a metric tracked by Redgate Monitor to help you assess the health and performance of your databases.

By correctly interpreting this ratio and using it with other relevant memory and IO metrics, you can identify potential bottlenecks in query execution before they impact users.

A high cache hit ratio generally indicates efficient memory usage in PostgreSQL, where most of the data pages required are being read from cache, minimizing costly disk reads. But how is this metric measured and tracked in Redgate Monitor?