Re: HEALTH_WARN 1 MDSs report oversized cache

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Ah, I understand now. Makes a lot of sense. Well, we have a LOT of small
files so that might be the reason. I'll keep an eye on it whether the
message shows up again.

Thank you!

Ranjan


Am 05.12.19 um 19:40 schrieb Patrick Donnelly:
> On Thu, Dec 5, 2019 at 9:45 AM Ranjan Ghosh <ghosh@xxxxxx> wrote:
>> Ah, that seems to have fixed it. Hope it stays that way. I've raised it
>> to 4 GB. Thanks to you both!
> Just be aware the warning could come back. You just moved the goal posts.
>
> The 1GB default is probably too low for most deployments, I have a PR
> to increase this: https://github.com/ceph/ceph/pull/32042
>
>> Although I have to say that the message is IMHO *very* misleading: "1
>> MDSs report oversized cache" sounds to me like the cache is too large
>> (i.e. wasting RAM unnecessarily). Shouldn't the message rather be "1
>> MDSs report *undersized* cache"? Weird.
> No. I means the MDS cache is larger than its target. This means the
> MDS cannot trim its cache to go back under the limit. This could be
> for many reasons but probably due to clients not releasing
> capabilities, perhaps due to a bug.
>
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