How can I develop scalable application servers with VDB?
VDB provides several features that simplify developing scalable application and web servers. In particular, built-in connection pooling and automatic, adaptive query preparing and caching features can significantly improve both the performance and scalability of your application servers. Database connections are resource-intensive. The more connections, the greater the load on the database server. When using connection pooling, your application server will only have as many connections to the database as there are concurrent requests, not concurrently logged in users. If your application has 100 concurrent users, but only 10 of them have active requests at any given time, then you will have at most 10 connections to the database, instead of 100. This greatly reduces the load on the database server, which affects not only the application server, but also any other programs connected to the database. See #9 for information on enabling connection pooling. Note that for connection pooling
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