Date: Mon, 03 Nov 2025 13:21:35 +0000 From: bugzilla-noreply@freebsd.org To: fs@FreeBSD.org Subject: [Bug 290207] [ZFS] lowering "vfs.zfs.arc.max" to a low value causes kernel threads of "arc_evict" to use 91% CPU and disks to wait. System gets unresponsive... Message-ID: <bug-290207-3630-V9CSCWavEV@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-290207-3630@https.bugs.freebsd.org/bugzilla/> References: <bug-290207-3630@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D290207 --- Comment #36 from Rick Macklem <rmacklem@FreeBSD.org> --- (In reply to Nils Beyer from comment #35) Yes, the tunable that affects arc_available_memory() is vfs.zfs.arc.free_target (which is also called vfs.zfs.arc_free_target on my test system. The !UMA_USE_DMAP case is pretty much noise now that i386 is not supported. (UMA_USE_DMAP is defined in amd64/include/vmparam.h. I haven't looked at other arches.) You could try increasing vfs.zfs.arc.free_target can see what happens? --=20 You are receiving this mail because: You are the assignee for the bug.=
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