So you got your answers. But therefore the way you'd like DreamHost is for the fairly environment. They don't limit connection to database. Even you'll get mostly possible things as unlimited such as number,size and concurrent connection of database, number of domains,subdomain,parked,mirrored domains etc etc. Basically these are the main thing i like DreamHost and refer others(needing shared and affordable hosting) to get DreamHost's hosting. I think you'll ok here.
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