[dnsdist] Erratic CPU Usage

[Winfried Angele]

Hi Jahanzeb,

May be related. We see strange cpu patterns as well after some runtime. On every PowerDNS software product by the way. But it's only the relation between user and system cpu which oscillates, the sum cpu usage does not change. I don't know the reason why this happens but it doesn't harm as far as I know. The system and user cpu in the linked graphs below are "stacked".

Winfried

https://drive.google.com/file/d/1n7FEYlQREvuzjOhFvIAo2fJ6yoj7kikk

https://drive.google.com/file/d/1VRouZOIMMucHTQ68WN8dL432NHLKAcya



Am 24. Dezember 2020 07:25:53 MEZ schrieb Jahanzeb Arshad via dnsdist <dnsdist at mailman.powerdns.com>:
>Hi,
>
>We have deployed two instances of dnsdist v1.5.1 on CentOS 7.9. After
>running for 7-8 days both the machines start showing erratic CPU usage
>pattern. The CPU usage jumps to 40% then 0 and the servers keep on
>doing this. If the process is restarted this is fixed. Need some help
>to identify and fix this issue.
>
>Regards
>
>Jahanzeb
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