Firstly, leaving swap enabled is an anti-pattern in general [0] as OpenShift is then unable to recognize OOM conditions until performance is thoroughly degraded. Secondly, we generally recommend to our customers that they have at least 20GB [1] for Masters. I've seen many customers go far past that to suit their comfort.
[0] https://docs.openshift.com/container-platform/3.6/admin_ guide/overcommit.html#disabling-swap-memory [1] https://docs.openshift.com/container-platform/3.6/ install_config/install/prerequisites.html#production- level-hardware-requirements ___________________________________________________ LOUIS P. SANTILLAN SENIOR CONSULTANT, OPENSHIFT, MIDDLEWARE & DEVOPS Red Hat Consulting, NA US WEST <https://www.redhat.com/> lpsan...@gmail.com M: 3236334854 <https://red.ht/sig> TRIED. TESTED. TRUSTED. <https://redhat.com/trusted> On Fri, Oct 20, 2017 at 4:54 PM, Joel Pearson <japear...@agiledigital.com.au > wrote: > Hi, > > I've got a brand new OpenShift cluster running on OpenStack and I'm > finding that the single master that I have is struggling big time, it seems > to consume tons of virtual memory and then start swapping and slows right > down. > > It is running with 16GB of memory, 40GB disk and 2 CPUs. > > The cluster is fairly idle, so I don't know why the master gets this way. > Restarting the master solves the problem for a while, for example, I > restarted it at 10pm last night, and when I checked again this morning it > was in the same situation. > > Would having multiple masters alleviate this problem? > > Here is a snapshot of top: > > [image: Inline images 1] > > Any advice? I've happy to build the cluster with multiple masters if it > will help. > > > -- > Kind Regards, > > Joel Pearson > Agile Digital | Senior Software Consultant > > Love Your Software™ | ABN 98 106 361 273 > > > _______________________________________________ > users mailing list > users@lists.openshift.redhat.com > http://lists.openshift.redhat.com/openshiftmm/listinfo/users > >
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