Rainer Heilke,
You have 1/4 of the amount of memory that the 2900 system
is capable of (192GBs : I think).
Secondly, output from fsstat(1M) could be helpful.
Run this command over time and check to see if the
values change over time..
Mitchell Erblich
---------------
Rainer Heilke wrote:
>
> > What hardware is used? Sparc? x86 32-bit? x86
> > 64-bit?
> > How much RAM is installed?
> > Which version of the OS?
>
> Sorry, this is happening on two systems (test and production). They're both
> Solaris 10, Update 2. Test is a V880 with 8 CPU's and 32GB, production is an
> E2900 with 12 dual-core CPU's and 48GB.
>
> > Did you already try to monitor kernel memory usage,
> > while writing to zfs? Maybe the kernel is running
> > out of
> > free memory? (I've bugs like 6483887 in mind,
> > "without direct management, arc ghost lists can run
> > amok")
>
> We haven't seen serious kernel memory usage that I know of (I'll be honest--I
> came into this problem late).
>
> > For a live system:
> >
> > echo ::kmastat | mdb -k
> > echo ::memstat | mdb -k
>
> I can try this if the DBA group is willing to do another test, thanks.
>
> > In case you've got a crash dump for the hung system,
> > you
> > can try the same ::kmastat and ::memstat commands
> > using the
> > kernel crash dumps saved in directory
> > /var/crash/`hostname`
> >
> > # cd /var/crash/`hostname`
> > # mdb -k unix.1 vmcore.1
> > ::memstat
> > ::kmastat
>
> The system doesn't actually crash. It also doesn't freeze _completely_. While
> I call it a freeze (best name for it), it actually just slows down
> incredibly. It's like the whole system bogs down like molasses in January.
> Things happen, but very slowly.
>
> Rainer
>
>
> This message posted from opensolaris.org
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