processes are killed because of out of swap space

[Wojciech Puchar]

>> If you are not seeing such swap_pager_getswapspace  messages, then
>> it is likely that the mount of swap space still available is not the
>> actual thing driving the kills.
>> 
>> Another thing that can lead to kills is paging I/O that is
>> slow.
>
> paging device is nvd so it's fast. And system isn't even paging heavily. but 
> is doing geom_raid5 rebuild right now+copying lots of files to this raid (new 
> RAID5 just created).
>
>
> but still - there is A LOT of memory to be reclaimed. inactive is many 
> gigabytes on my server.
>
>> # Delay when persisstent low free RAM leads to
>> # Out Of Memory killing of processes:
>> vm.pageout_oom_seq=120
> set to 300.
>
>> some free RAM.)
>> 
>> #
>> # For plunty of swap/paging space (will not
>> # run out), avoid pageout delays leading to
>> # Out Of Memory killing of processes:
>> vm.pfault_oom_attempts=-1
>
> i don't have such sysctl. is it in FreeBSD 12?
> i have 11.3
>

after changes - no effect