>You may want to use persistent connections, also.
Almost certainly you don't. The discussion sites are full of complaints that it
doesn't work properly. There is a tendency for the connections to not get reused, but
not released, either, such that you quickly run out of connections. This is with
mod_php, of course; if you're running PHP as a CGI then persistent connections don't
hurt (nor help, obviously, since the process exits after doing its thing.)
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