With MySQL it's not necessarily always a good thing to persist connections. If your script dies, you lost that connection as a resource until it's killed for be

With MySQL it's not necessarily always a good thing to persist connections. If your script dies, you lost that connection as a resource until it's killed for being idle. Most DBs all have their own connection pooling mechanisms that don't work the same way, so we need to look into each to see if it's worth it. Caching though (query as well as HTML), is usually always a good idea.