Swap Questions

[Ronald Klop]

On Fri, 14 Aug 2015 15:15:26 +0200, Tim Daneliuk <tundra at tundraware.com>  
wrote:

> I just built a 10.2 machine on a cloud-based VPS (Digital Ocean) that has
> 512M of memory and 1G of swap partition.  I am seeing a ton of errors  
> like
> this:
>
> Aug 14 00:01:22 myhost kernel: swap_pager_getswapspace(10): failed
> Aug 14 00:01:22 myhost kernel: swap_pager_getswapspace(14): failed
> Aug 14 00:01:22 myhost kernel: swap_pager_getswapspace(11): failed
> Aug 14 00:01:22 myhost kernel: swap_pager_getswapspace(6): failed
> Aug 14 00:01:22 myhost kernel: swap_pager_getswapspace(7): failed
> Aug 14 00:01:22 myhost last message repeated 2 times
>
>
> So, I added this to fstab (after creating /usr/swap0):
>
> md99	none	swap	sw,file=/usr/swap0	0	0
>
> And then did this:
>
> swapon -aq
>
>
> But, when I do a swapinfo, all I can see is the "disk" swap partition
> that comes standard with the VPS:
>
>
> Device          1K-blocks     Used    Avail Capacity
> /dev/gpt/swapfs   1048576   456572   592004    44%
>
>
>
> Two questions:
>
> 1) Is this reasonable behavior from  a machine wiht 512M of memory and
>    a 1G swap partition?  I am doing things like running clamscan and
>    buildworld at the same time. That's why I tried to add space with
>    a file.
>
> 2) Why doesn't the extra swap disk appear in the hostinfo output.
>

Does the /dev/md99 device exist now? Otherwise something went wrong when  
you tried adding swap. Try swapon -a without the -q.

Ronald