Re: ...changed from TIME to SPACE

[Paul Everlund]

Jens Rehsack wrote:

Paul Everlund wrote:

C J Michaels wrote:

Some time in the recent past Paul Everlund scribbled:

>Hi list!
>
>What does this mean?
>
># sysctl kern.msgbuf
>[snip]
><5>/var: optimization changed from TIME to SPACE
><118>Dec 10 11:36:12 fw /kernel: /var: optimization changed from TIME to
>SPACE [snip]

It means that your /var filesystem is nearly full. The kernel is now
trying to maximize the amout of free full blocks on the filesystem.

>From fs(5) manpage:
===
The element fs_optim specifies whether the file system should try to min-
imize the time spent allocating blocks, or if it should attempt to mini-
mize the space fragmentation on the disk. If the value of fs_minfree
(see above) is less than 10%, then the file system defaults to optimizing
for space to avoid running out of full sized blocks. If the value of
minfree is greater than or equal to 10%, fragmentation is unlikely to be
problematical, and the file system defaults to optimizing for time.
===

Some other good reads would be tunefs(8), newfs(8), and the mailing list
archives.

Thank you Chris and Jens for your replies!

A full file system on /var triggered it?

# df -k
Filesystem  1K-blocks   Used   Avail Capacity  Mounted on
/dev/ad1s1a     65470  40452   19782    67%    /
/dev/ad0s1e   2030062 801262 1066396    43%    /usr
/dev/ad1s1e     35230  17770   14642    55%    /var
procfs              4      4       0   100%    /proc

It doesn't look full to me.

Best regards,
Paul

Try 'df -ik'

# df -ik
Filesystem 1K-blocks Used Avail Capacity iused ifree %iused Mounted on
/dev/ad1s1a 65470 40452 19782 67% 1517 6801 18% /
/dev/ad0s1e 2030062 801262 1066396 43% 110510 144464 43% /usr
/dev/ad1s1e 35230 17512 14900 54% 825 3653 18% /var
procfs 4 4 0 100% 49 483 9% /proc

The i-nodes are fine too.

Anyway, I guess it is as Bill Moran wrote, that a temporary file was
created, that made it change, and somewere in the logs a change back
should be found. Will check it later.

Thank you all for your replies! In the future, now I know what TIME
to SPACE and vice versa means!

Best regards,
Paul



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