Hi Sergio, Assuming nobody is actually mounting a SYN flood attack, then this sounds like you're either being hammered with connection requests in very short periods of time, or your TCP backlog tuning is off. At least, that's where I'd start looking. If you take that log message and google it (Possible SYN flooding... Sending cookies") you'll find explanations. Or just googling "TCP backlog tuning".
R On 10/30/19, 3:29 PM, "Sergio Bilello" <[email protected]> wrote: > >Oct 17 00:23:03 prod-personalization-live-data-cassandra-08 kernel: TCP: request_sock_TCP: Possible SYN flooding on port 9042. Sending cookies. Check SNMP counters. --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
