Quick note, this is delayed until tomorrow. On 09/23 17:12, David Caro wrote: > > Hi everyone, > > Lately the k8s cluster has been reaching it's cpu allocation limits, and to > solve this we are changing a bit the default cpu limits that we were setting > for jobs. > > This will be effective today. You might see for a short amount of time that > the > reported cpu for your jobs is not what you expect, and that your continuous > jobs have been restarted to apply the new changes. > > This will not have a degrading effect for the jobs, on the other side, it > might > allow jobs that try to use more cpu to get it, and improve the overall cpu > resource usage in the cluster. > > Here comes the kubernetes specific notes if anyone is interested :) > > Until now, the default CPU limit and request was set to 500m, and if you were > requesting less than that, you would get the same request and limit that you > requested. If you were asking for more than than, the request would be set to > 1/2 of what you asked for, and the limit to exactly what you asked for. > > From now on, the default CPU limit will be 4000m, allowing your pods to use > way > more than before by default if it's available, and the default request will be > 100m (roughly the current cluster mean usage), this will help using better the > current resources in the cluster. > > And if you specify a cpu value, it will be used as both the request and the > limit ensuring that your job is allocated to a node only if it has enough cpu. > > > More notes and details in the task https://phabricator.wikimedia.org/T404726 > > If we end up changing the memory limits, we will give some advance notice so > you can change your resources accordingly if needed. > > > Thanks! > > -- > David Caro > SRE - Cloud Services > Wikimedia Foundation <https://wikimediafoundation.org/> > PGP Signature: 7180 83A2 AC8B 314F B4CE 1171 4071 C7E1 D262 69C3 > > "Imagine a world in which every single human being can freely share in the > sum of all knowledge. That's our commitment."
-- David Caro SRE - Cloud Services Wikimedia Foundation <https://wikimediafoundation.org/> PGP Signature: 7180 83A2 AC8B 314F B4CE 1171 4071 C7E1 D262 69C3 "Imagine a world in which every single human being can freely share in the sum of all knowledge. That's our commitment."
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