Hi I encountered a weir performance issue:
Virtual DNS running in VM - (Flavor 4 vCPU), in theory, the named process can reach to 400% Query Log is On: When Traffic is 35KQPS, Named Process CPU usage can reach to maximum 260% . but , Even if I increase the traffic to 70KQPS, the named process CPU usage can't be more than 260% (lot of failure). - still 260% CPU usage, which impact DNS performance significantly. Is there any parameter which impact the performance of DNS? -- No recursive query during my performance test. Query Log is off: Named Process CPU usage can be more than 260%. Why Query log off/on feature is impacting named CPU Usage ? rndc status version: BIND 9.10.5-S1 <id:041e344> (Unknown) boot time: Tue, 13 Feb 2018 06:12:53 GMT last configured: Tue, 13 Feb 2018 06:12:53 GMT CPUs found: 4 worker threads: 4 UDP listeners per interface: 3 number of zones: 102 debug level: 0 xfers running: 0 xfers deferred: 0 soa queries in progress: 0 query logging is OFF recursive clients: 0/900/1000 tcp clients: 0/15000 server is up and running BR Michael
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