> > > For this purpose, "connected" and "pingable" are the same thing.
> >
> > Yes and no. If you can't ping the server, but the TCP socket is
> > still open, that means you essentially have this TCP connection to the
> > server that's not being used, in an open state, for the rest of the
lifetime
> > of your apache server instance. This could be a Bad Thing, say, if it's
in
> > mid-transaction, keeping a table lock open...
> Sorry, but this sounds like total conjecture to me. You have to expect
> certain basic things to work, and one of them is that a connection which
> can't be ping'ed is not holding a table lock. If it is, this is a much
> lower-level bug than DBI should try to deal with.
I'll add one more thing - for some drivers a call to $dbh->ping() will
generate a *new* connection *if* the driver thinks that the $dbh is
currently active (ie has an active $sth) - DBD::Sybase in particular, but I
suspect that other drivers that don't support multiple active statements on
a single physical connection will have the same behavior.
Michael
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