A determination is made that the performance of a user database query to a database does not meet a first performance threshold. In response to the user database query not meeting the first performance threshold, one or more test queries of the database are performed. A second determination is made whether a performance of the one or more test queries meets a second performance threshold. In response to the one or more test queries meeting the second performance threshold, an analysis is performed to determine whether to resize a database buffer cache of the database.