Determine Total Number of Open/Active Connections in MS SQL ServerSeptember 16, 2017 · 2 min read
This article contains a SQL query which can be used to determine the total number of open/active connections in MS SQL Server. Also explains, how to solve the error "Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached."