Re: High swap usage on one replication node

[Martin Verges <martin.verges@xxxxxxxx>]

Without reading the links:

from more then 20y Linux server and datacenter hosting environment, around 7y of Ceph, and hundreds of different systems all configured without swap. I never ever had a problem with noswap that would be solved using swap.

But on my Linux desktop swap helps me a bit. 

btw, all multiple hundred croit based ceph deployments are 100% swap free. As we boot over the network directly into the ram, there is no swap disk that would be available. We don't have any issues with this and I doubt we will ever encounter such. 

--
Martin Verges
Managing director

Mobile: +49 174 9335695
E-Mail: martin.verges@xxxxxxxx
Chat: https://t.me/MartinVerges

croit GmbH, Freseniusstr. 31h, 81247 Munich
CEO: Martin Verges - VAT-ID: DE310638492
Com. register: Amtsgericht Munich HRB 231263

Web: https://croit.io
YouTube: https://goo.gl/PGE1Bx

Nigel Williams <nigel.williams@xxxxxxxxxxx> schrieb am So., 8. Dez. 2019, 23:15:

On Sun, 8 Dec 2019 at 00:53, Martin Verges <martin.verges@xxxxxxxx> wrote:
> Swap is nothing you want to have in a Server as it is very slow and can cause long downtimes.

Given the commentary on this page advocating at least some swap to
enable Linux to manage memory when under pressure:

https://utcc.utoronto.ca/~cks/space/blog/unix/NoSwapConsequence

is it worth modifying the advice to at least have some swap available
(even if only say 5% of overall memory)?

There was a hnews thread here but to me it seemed inconclusive about
solving the overall problem (other than applications taking more
responsibility for memory consumption):

https://news.ycombinator.com/item?id=20641551
_______________________________________________
ceph-users mailing list -- ceph-users@xxxxxxx
To unsubscribe send an email to ceph-users-leave@xxxxxxx

_______________________________________________
ceph-users mailing list -- ceph-users@xxxxxxx
To unsubscribe send an email to ceph-users-leave@xxxxxxx