Hi Jason, This should have helped.
6542676 ARC needs to track meta-data memory overhead
Some of the lines to arc.c:
1551 1.36 if (arc_meta_used >= arc_meta_limit) {
1552 /*
1553 * We are exceeding our meta-data cache limit.
1554 * Purge some DNLC entries to release holds on
meta-data.
1555 */
1556 dnlc_reduce_cache((void
*)(uintptr_t)arc_reduce_dnlc_percent);
1557 }
-r
Jason J. W. Williams writes:
> Hello All,
>
> Awhile back (Feb '07) when we noticed ZFS was hogging all the memory
> on the system, y'all were kind enough to help us use the arc_max
> tunable to attempt to limit that usage to a hard value. Unfortunately,
> at the time a sticky problem was that the hard limit did not include
> DNLC entries generated by ZFS.
>
> I've been watching the list since then and trying to watch the Nevada
> commits. I haven't noticed that anything has been committed back so
> that arc_max truly enforces the max amount of memory ZFS is allowed to
> consume (including DNLC entries). Has this been corrected and I just
> missed it? Thank you in advance for you any help.
>
> Best Regards,
> Jason
> _______________________________________________
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> zfs-discuss@opensolaris.org
> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
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