ZFS performance issues (solved?!)

Henri Hennebert hlh at restart.be
Mon Sep 1 07:39:06 UTC 2008

John Birrell wrote:
> For those people experiencing a performance degradation since the DTrace import,
> please update your copy of src/sys/cddl/compat/opensolaris/kern/opensolaris_kmem.c
> by either cvsup of direct edit to remove "#define KMEM_DEBUG".
> You only need to rebuild the opensolaris kernel module after this change. The code
> is shared between ZFS and DTrace via the opensolaris kernel module.
> This is also the reason why you found it necessary to add KDB, DDB and STACK to
> your kernel. After removing KMEM_DEBUG, you won't need those.
> Please confirm that this solves the problem you have been seeing.

Great, now everything is back to normal


> --
> John Birrell
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