Can anyone provide me with a ballpark timing (in milliseconds) for how long it takes to establish a new DB connection to SQL from C#. I.e. what is the overhead when a connection pool must create a new connection.
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Can anyone provide me with a ballpark timing (in milliseconds) for how long it takes to establish a new DB connection to SQL from C#. I.e. what is the overhead when a connection pool must create a new connection.
It depends:
Some more esoteric times:
Usually you can do some 10-15 new connections per second. If there’s an issue (eg. DNS lookup problem, IPsec issued, SSL problems, Kerberos issues) it can easily go up into 10-15 seconds per conection.
By contrast an existing pooled connection only has to execute sp_resetconnection (that is one roundtrip on an existing channel), and even that can be avoided if necessary.