> Hello,
>
> I use OpenBSD amd64 snapshots on the following dmesg hardware.
> The download rate on a browser was slow and I figured out with some
> memory mapped partition that disk transfer rate was slow.
> I can bear this since I'm not into large file transfer business. But
> here is another interesting fact: each time my disk is used by some
> file transfer, all the running applications, mostly GUI based are
> stalling - that includes mostly chromium ( even if it is not chromium
> that it does the disk data transfer).
>
> My questions are: is something incorrectly set up on my computer,
> regarding the multitasking?
> I understand disk operations are slow, but may I say that kernel is
> dragged in that slow transfer too (no DMA, no cache, etc.)?
> Does this happens to all users, but since there are more powerful
> configuration involved the delay is not so noticeable?
>
> I know it is hard to project this, but can someone give me a hint
> about a minimum hardware to allow using chromium with no delays,
> please?
> I know, it should be advisable to get the maximum performance
> hardware, but i'm not in that case.

<snip>

> sd0 at scsibus1 targ 0 lun 0: <ATA, ST250DM000-1BD14, KC47>
> naa.5000c5006520feaf
> sd0: 238475MB, 512 bytes/sector, 488397168 sectors

You're running on a Seagate 7200 RPM spinning disk. Migrate to an SSD.
Literally any SSD. I don't know where you are, but here, an equivalent
size generic SATA SSD costs $40 USD and will be exponentially faster for
random read/write and IOPS.

Trying to run heavy modern desktop applications like Chromium from a
spinning disk is an exercise in masochism. You're also running Chromium
with 8 GB of RAM, so it's entirely possible you're running into swap,
which will REALLY kill your performance, especially on a spinning disk...

-- 

Joe Gidi
[email protected]

"You cannot buy skill." -- Ross Seyfried

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