>On the logging, not sure what you mean by the old logs get clobbered. For us the logs are not opened in append-mode, just write. We don't do any house cleanin

>On the logging, not sure what you mean by the old logs get clobbered. For us the logs are not opened in append-mode, just write. We don't do any house cleaning except for logrotate, but that only runs nightly and isn't the cause of what we're seeing. Like I said, it may not be for the normal mongod instance, but it's definitely true for mongos. I'll double-check on the version number of what we're running > do you host your databases on Amazon? Nope, all owned servers, over a local network on a switch we own as well. The switching happens on some clusters more then others, so it's possibly a usage related thing.