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From Christopher Schultz <>
Subject Re: (JDBC Connections (was: Content Type)
Date Mon, 03 Nov 2003 17:36:51 GMT
> What is Tomcat's limitation on multiple connection to database?

Tomcat has no limit on DB connections. Unless you are using a Realm, 
Tomcat does not have any control over db connections.

> I have a
> simple servlet application that connects to Oracle database for data.  Since
> it is a very simple application, no connection pooling is used.  Someone
> raised a question on whether Tomcat can handle hundreds of calls to the
> servlets and hundreds of connections to the Oracle database.

Again, Tomcat doesn't care. The VM may care, though. Especially with 
Oracle, JDBC connections take a long time to establish and use of a lot 
of memory on the server, and often the client. You should use connection 
pooling for a number of reasons:

1. Performance (re-using connections takes less time than creating more)
2. Resource limiting (pool limits the number of total connections)
3. Configuration (easier to manage a connection pool than code to create 
connections on the fly and make sure they are closed/managed appropriately)


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