raid fifa wrote:
Is this a bug of mysql_ping() ? or any other advice?
Probably not. I think you'll find that it *does* time out, just after a longer period than you'd prefer. Timeouts of 30, 60 and 120 seconds are common in network code, because it's not possible to reliably determine that a link is down until then.
Your OS might have a setting that makes it close all sockets using an interface that just lost its physical link to the network. This is often more trouble than it's worth, because the link might come back up before any of those sockets need to send data again. If you need immediate notification that the link to the DB is down, though, it might be what you want.
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