(30) @ 12:01:50> swapinfo
Device 1K-blocks Used Avail Capacity
/dev/zvol/bigD/swap 4194304 0 4194304 0%
/dev/gpt/swap0.eli 3145728 0 3145728 0%
/dev/gpt/swap1.eli 3145728 0 3145728 0%
Total 10485760 0 10485760 0%
[...]
*************************************************************
FreeBSD 10.0-CURRENT #1 r240891: Tue Sep 25 00:51:03 EDT 2012
warning: increase kern.maxswzone or reduce amount of swap.
*************************************************************
Apparently kern.maxswzone is currently equal to 0. How might I tweak it
just enough to fix this?
So, reduce amount of swap :)
This is because kernel needs some memory to manage swap too.
Currently for amd64 this roughly reduces to the following rule
(My apologies in advance for the extra simplification):
100MB RAM per 800MB swap space.
So, with your current amount of RAM (893MB) it is recommended to setup
no more than 7144 MB of swap. [1]
Thanks for the good ideas. Thus far,
# zfs get volsize bigD/swap
NAME PROPERTY VALUE SOURCE
bigD/swap volsize 4G local
# zfs set volsize=1100m bigD/swap
# zfs get volsize bigD/swap
NAME PROPERTY VALUE SOURCE
bigD/swap volsize 1.07G local
(73) @ 6:55:44> swapinfo -h
Device 1K-blocks Used Avail Capacity
/dev/#C:0x6c 4194304 808k 4G 0%
/dev/gpt/swap0.eli 3145728 772k 3G 0%
/dev/gpt/swap1.eli 3145728 800k 3G 0%
Total 10485760 2.3M 10G 0%
- yes, it appeared that something weird happened to the file name
# zfs destroy -V bigD/swap
- file in use or some error
# reboot
# swapinfo -h
Device 1K-blocks Used Avail Capacity
/dev/zvol/bigD/swap 1126400 0B 1.1G 0%
/dev/gpt/swap0.eli 3145728 0B 3.0G 0%
/dev/gpt/swap1.eli 3145728 0B 3.0G 0%
Total 7417856 0B 7.1G 0%
So the zvol swap size was reduced, but the swzone error still exists.
Also, the zfs create and destroy commands availed nothing- perhaps there
were subsequent or subcommands to run there.
Is there a good method to reduce the encrypted swap, perhaps? I might
like to have a total of 3g encrypted swap plus 3g zvol swap.
Darrel
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