Jürgen Keil writes:
> > ZFS 11.0 on Solaris release 06/06, hangs systems when
> > trying to copy files from my VXFS 4.1 file system.
> > any ideas what this problem could be?.
>
> What kind of system is that? How much memory is installed?
>
> I'm able to hang an Ultra 60 with 256 MByte of main memory,
> simply by writing big files to a ZFS filesystem. The problem
> happens with both Solaris 10 6/2006 and Solaris Express snv_48.
>
> In my case there seems to be a problem with ZFS' ARC cache,
> which is not returning memory to the kernel, when free memory
> gets low. Instead, ZFS' ARC cache data structures keeps growing
> until the machine is running out of kernel memory. At this point
> the machine hangs, lots of kernel threads are waiting for free memory,
> and the box must be power cycled (Well, unpluging and re-connecting
> the type 5 keyboard works and gets me to the OBP, where I can force
> a system crashdump and reboot).
>
>
> This message posted from opensolaris.org
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Seems like:
6429205 each zpool needs to monitor it's throughput and throttle heavy writers
(also fixes: 6415647 Sequential writing is jumping)
-r
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