This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Connection pooling is creating connections to a database and then sharing those connections among various classes as they need database access. This is more efficient than creating a new connection for each request. Most of the good JDBC books cover this topic in depth.