BTW, You may think that the improvement is achieved by caching, but I clear
the cache with
sync & echo 3 > /proc/sys/vm/drop_caches
So, can't claim for sure, need other opinion, but looks like for NVMe,
writethrough must be used if you want high IO rate. At least with Intel
p4500.
пт, 17 мая 201
What happens when you set deadline scheduler in both HV and guest?
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Nux!
www.nux.ro
- Original Message -
> From: "Ivan Kudryavtsev"
> To: "users" , "dev"
> Sent: Friday, 17 May, 2019 14:16:31
> Subject: Re: Poor NVMe Performance wit
Well, just FYI, I changed cache_mode from NULL (none), to writethrough
directly in DB and the performance boosted greatly. It may be an important
feature for NVME drives.
Currently, on 4.11, the user can set cache-mode for disk offerings, but
cannot for service offerings, which are translated to c
Nux,
there is no way to set it for NVME as it only has [none] option in
/sys/block/nvme0n1/queue/scheduler
Setting any scheduler for VM volume doesn't improve a thing.
пт, 17 мая 2019 г., 20:21 Nux! :
> What happens when you set deadline scheduler in both HV and guest?
>
> --
> Sent from the De
