Hi,
We also noticed an increase of CPU - both system and user - on our c3.4xlarge
fleet. So far it's really visible with max(%user) and especially max(%system),
it has doubled!I graphed a ratio "write/s / %system", it's interesting to see
how the value dropped yesterday, you can see it here: https://ibb.co/dnVcHG
For reference:
https://aws.amazon.com/fr/security/security-bulletins/AWS-2018-013/
Best,
Romain
Le vendredi 5 janvier 2018 à 13:09:35 UTC+1, Steinmaurer, Thomas
<thomas.steinmau...@dynatrace.com> a écrit :
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Hello,
has anybody already some experience/results if a patched Linux kernel regarding
Meltdown/Spectre is affecting performance of Cassandra negatively?
In production, all nodes running in AWS with m4.xlarge, we see up to a 50%
relative (e.g. AVG CPU from 40% => 60%) CPU increase since Jan 4, 2018, most
likely correlating with Amazon finished patching the underlying Hypervisor
infrastructure …
Anybody else seeing a similar CPU increase?
Thanks,
Thomas
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