On Sun, 11 Mar 2018, Matthew D. Fuller wrote:
On Sun, Mar 11, 2018 at 10:43:58AM -1000 I heard the voice of
Jeff Roberson, and lo! it spake thus:
First, I would like to identify whether the wired memory is in the
buffer cache. Can those of you that have a repro look at sysctl
vfs.bufspace and tell me if that accounts for the bulk of your wired
memory usage? I'm wondering if a job ran that pulled in all of the
bufs from your root disk and filled up the buffer cache which
doesn't have a back-pressure mechanism.
If by "root disk", you mean the one that isn't ZFS, that wouldn't
touch anything here; apart from a md-backed UFS /tmp and some NFS
mounts, everything on my system is ZFS.
I believe vfs.bufspace is what shows up as "Buf" on top? I don't
recall it looking particularly interesting when things were madly
swapping. I'll uncork arc_max again for a bit and see if anything odd
shows up in it, but it's only a dozen megs or so now.
You are right. I forgot that it was in top and didn't notice.
What I believe I need most is for someone to bisect a few revisions to let
me know if it was one of my two major patches.
Thanks,
Jeff
--
Matthew Fuller (MF4839) | fulle...@over-yonder.net
Systems/Network Administrator | http://www.over-yonder.net/~fullermd/
On the Internet, nobody can hear you scream.
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