Concurrent DB connection pool in Haskell

Question

I am a Java programmer who learns Haskell.
I work on a small web-app that uses Happstack and talks to a database via HDBC.

I\'ve written select and

Answer 1

The resource-pool package provides a high-performance resource pool which can be used for database connection pooling. For example:

import Data.Pool (createPool, withResource)

main = do
    pool <- createPool newConn delConn 1 10 5
    withResource pool $ \conn -> doSomething conn

Creates a database connection pool with 1 sub-pool and up to 5 connections. Each connection is allowed to be idle for 10 seconds before being destroyed.