Re: pkg upgrade, vfs.zfs.arc.free_target, vfs.zfs.arc.sys_free, vm.pageout_oom_seq

In reply to: Graham Perrin : "pkg upgrade, vfs.zfs.arc.free_target, vfs.zfs.arc.sys_free, vm.pageout_oom_seq"
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From: void <void_at_f-m.fm>
Date: Sun, 31 Aug 2025 15:44:46 UTC

On Sat, Aug 30, 2025 at 10:19:57AM +0100, Graham Perrin wrote:

>The physical storage that I use for the virtual disks is slow, even 
>when connected to super speed USB (5Gb/s). An old StoreJet Transcend 
>mobile HDD.  The varying slowness might explain why upgrades fails for 
>me (pkg killed, failed to reclaim memory) more often than for other 
>testers.

I've had two external usb3-connected disks and write performance
got so bad I had to throw them away, for the reasons you're describing. 
These were SMR disks. It seemed to me that the decreasing performance
could be viewed as a failure mode, but with data not being lost.

Good for archives I guess but forget it for heavy disk i/o.
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