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From Furkan KAMACI <furkankam...@gmail.com>
Subject Re: SolrCloud one server with high load
Date Mon, 04 Mar 2019 14:00:36 GMT
Hi Gaël,

Does all three servers have same specifications? On the other hand, is your
load balancing configuration for Varnish is round-robin?

Kind Regards,
Furkan KAMACI

On Mon, Mar 4, 2019 at 3:18 PM Gael Jourdan-Weil <
gael.jourdan-weil@kelkoogroup.com> wrote:

> Hello,
>
> I come again to the community for some ideas regarding a performance issue
> we are having.
>
> We have a SolrCloud cluster of 3 servers.
> Each server hosts 1 replica of 2 collections.
> There is no sharding, every server hosts the whole collection.
>
> Requests are evenly distributed by a Varnish system.
>
> During some peaks of requests, we see one server of the cluster having
> very high load while the two others are totally fine.
> The server experiencing this high load is always the same until we reboot
> it and the behavior moves to another server.
> The server experiencing the issue is not necessarily the leader.
> All servers receive the same number of requests per seconds.
>
> Load data:
> - Server1: 5% CPU when low QPS, 90% CPU when high QPS (this one having
> issues)
> - Server2: 5% CPU when low QPS, 25% CPU when high QPS
> - Server3: 5% CPU when low QPS, 20% CPU when high QPS
>
> What could explain this behavior in SolrCloud mechanisms?
>
> Thank you for reading,
>
> Gaël Jourdan-Weil
>

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