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close mysql connection important?
How important is it close an mysql connection in a website and why?
Possible Duplicate: close mysql connection important? How important is it close an mysql connection
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Possible Duplicate:
close mysql connection important?
How important is it close an mysql connection in a website and why?
Every database engine has a limit on a maximum number of simultaneous connections. So if you don’t close the connection, mysql can run out of available connections (default max_connections is 100). In addition, each connection you hold consumes server’s resources (memory, a thread to listen, might be open filehandles).
CAVEAT
This does NOT hold true if the only things opening connection are web apps from ONE server and they use pooled connections. In such a case, you don’t risk opening more and more new connections (since every time your app needs a new one, it picks the ones available from the pool); and closing and re-opening the pool’s connections just wastes resources.