Re: [Soekris] MFS filling up on net4521

2008-06-16 Thread Chris Babcock
Brian Candler wrote:
> On Sun, Jun 15, 2008 at 08:20:23PM +0200, Bill Maas wrote:
>> A significant part of it
>> does not seem to be accounted for as actual disk usage:
>>
>> df -h:
>> Filesystem  1K-blocks  Used  Avail Capacity  Mounted on
>> mfs:22103   7.7M   5.4M  1.9M74%/var
>>
>> du -sh /var:
>> 1.8M/var/
>>
>> After a reboot it's back to a sane value (~20M). Leaks? Allocation
>> issues?
> 
> Something holding one of those files open in /var?

So a quick check of LSOF on on of my systems _does_ show deleted files, 
but only in the full listing, not with the +D option.

LSOF output line shows:
dd16230 cbabcock1w  REG9,2 23444104  48146 
/home/cbabcock/testfile.txt (deleted)
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Re: [Soekris] MFS filling up on net4521

2008-06-16 Thread Chris Babcock
Brian Candler wrote:
> On Sun, Jun 15, 2008 at 08:20:23PM +0200, Bill Maas wrote:
>> A significant part of it
>> does not seem to be accounted for as actual disk usage:
>>
>> df -h:
>> Filesystem  1K-blocks  Used  Avail Capacity  Mounted on
>> mfs:22103   7.7M   5.4M  1.9M74%/var
>>
>> du -sh /var:
>> 1.8M/var/
>>
>> After a reboot it's back to a sane value (~20M). Leaks? Allocation
>> issues?
> 
> Something holding one of those files open in /var?

Yeah, it does sound like deleted inodes being held open.  Anybody know 
if LSOF can display open but deleted inodes?

As a test, when one of the boxes gets low, try killing and restarting 
all of the processes LSOF displays with resources open on /var, and see 
if the utilization changes.

-Chris
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Re: [Soekris] MFS filling up on net4521

2008-06-16 Thread Brian Candler
On Sun, Jun 15, 2008 at 08:20:23PM +0200, Bill Maas wrote:
> A significant part of it
> does not seem to be accounted for as actual disk usage:
> 
> df -h:
> Filesystem  1K-blocks  Used  Avail Capacity  Mounted on
> mfs:22103   7.7M   5.4M  1.9M74%/var
> 
> du -sh /var:
> 1.8M/var/
> 
> After a reboot it's back to a sane value (~20M). Leaks? Allocation
> issues?

Something holding one of those files open in /var?
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[Soekris] MFS filling up on net4521

2008-06-15 Thread Bill Maas
Hi,

I'm not very familiar with memory issues let alone OpenBSD's MFS memory
allocation/release algorithms, but the following strikes me as being a
bit odd:

net5501:
Filesystem  1K-blocks  Used Avail Capacity  Mounted on
/dev/wd0a  98348628666264765031%/
mfs:265097855  2913  455039%/var

net4801:
Filesystem  1K-blocks  Used Avail Capacity  Mounted on
/dev/wd0a  98348628700264731031%/
mfs:184707855  3271  419244%/var

net4521:
Filesystem  1K-blocks  Used Avail Capacity  Mounted on
/dev/wd0a  496894424180 4787090%/
mfs:221037855  5485  197873%/var

All boxes have an MFS partition mounted onto /var. Amount of RAM varies
from (by heart - I'm not sitting next to these boxes right now) 128MB
(net4521) to 512MB (net 5501). The 4521 has the least amount of memory,
that's for sure.

What happens is that the disk usage on the MFS partition stabilizes at
around 40% when I use a log rotating script. But with the same script,
the MU keeps growing on the 4521 towards 100%. A significant part of it
does not seem to be accounted for as actual disk usage:

df -h:
Filesystem  1K-blocks  Used  Avail Capacity  Mounted on
mfs:22103   7.7M   5.4M  1.9M74%/var

du -sh /var:
1.8M/var/

After a reboot it's back to a sane value (~20M). Leaks? Allocation
issues? As said, the net4521 is lowest on RAM.

Or am I staring the Stupid and Obvious right in the eye here?

Bill



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