On Tue, 02 Aug 2011 12:55:43 +0200, seanr...@gmail.com
<seanr...@gmail.com> wrote:
On Tue, Aug 2, 2011 at 11:10 AM, Daniel Kalchev <dan...@digsys.bg> wrote:
If it is a limitation in ZFS it would be nice to know that, perhaps it
truly, really is a bug that can be avoided (or it's inherent in the
way ZFS
handles such things)
It is possible that there is not enough memory in ARC to cache that
large
directory.
Other than that, perhaps in ZFS it would be easier to prune the unused
directory entries, than it is in UFS. It looks like this is not
implemented.
Another reason might be some FreeBSD specific implementation issue for
fstatfs.
In any case, the data available is not sufficient. More information
would
help, like how much RAM this system has, how much ARC uses, some ARC
stats.
Which sysctl's would you like?
I grabbed these to start:
kstat.zfs.misc.arcstats.size: 118859656
kstat.zfs.misc.arcstats.hdr_size: 3764416
kstat.zfs.misc.arcstats.data_size: 53514240
kstat.zfs.misc.arcstats.other_size: 61581000
kstat.zfs.misc.arcstats.hits: 46762467
kstat.zfs.misc.arcstats.misses: 16999907
The machine has 2GB of memory.
What made me wonder is .. how exactly the kernel and zpool disagree on
zpool
version? What is the pool version in fact?
% dmesg | grep ZFS
ZFS NOTICE: Prefetch is disabled by default if less than 4GB of RAM is
present;
to enable, add "vfs.zfs.prefetch_disable=0" to
/boot/loader.conf.
ZFS filesystem version 5
ZFS storage pool version 28
% zpool get version tank
NAME PROPERTY VALUE SOURCE
tank version 15 local
% zpool upgrade tank
This system is currently running ZFS pool version 15.
Pool 'tank' is already formatted using the current version.
Sean
I think this zpool upgrade thing is weird. Can you try 'zpool upgrade -a'?
Mine says:
zpool get version zroot
NAME PROPERTY VALUE SOURCE
zroot version 28 default
Mind the SOURCE=default vs. SOURCE=local.
Is it possible you did 'zpool set version=15 tank' in the past? You can
check that with 'zpool history'.
NB: if you upgrade the boot pool, don't forget to upgrade to boot loader.
(See UPDATING)
Ronald.
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