Date: Mon, 03 Nov 2025 11:42:28 +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-tduDaQMA91@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 #34 from Nils Beyer <nbe@vkf-renzel.de> --- (In reply to Rick Macklem from comment #32) I've applied your patch and inserted a "printf" in "arc_os.c" at line 153. While "arc_lowmem" is not triggered by the deletion of "/usr/src.test", it indeed is triggered by using a 12GB TMPFS (using less to give it more room = to shovel free RAM around) and filling it afterwards. But also that pager error 5 still is triggered, too: ----------------------------------- SNIP ----------------------------------- ZFS: arc_lowmem called... uiomove_object: vm_obj 0xfffff8003c2c36c8 idx 3145728 pager error 5 ----------------------------------- SNIP ----------------------------------- After unmounting that TMPFS, "vm_pgcache" still is high at 652796kB... --=20 You are receiving this mail because: You are the assignee for the bug.=
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