Date: Mon, 13 Oct 2025 12:50:04 +0000 From: bugzilla-noreply@freebsd.org To: fs@FreeBSD.org Subject: [Bug 275594] High CPU usage by arc_prune; analysis and fix Message-ID: <bug-275594-3630-Z7Bbj4AkNk@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-275594-3630@https.bugs.freebsd.org/bugzilla/> References: <bug-275594-3630@https.bugs.freebsd.org/bugzilla/>
next in thread | previous in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D275594 --- Comment #153 from Nils Beyer <nbe@vkf-renzel.de> --- Apologies if I was not that clear before, but the disks indeed are waiting - not busy at all: ------------------------------------- SNIP ------------------------------------- PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND 0 root 59 - 0B 4176K CPU0 0 0:58 85.60% kernel{arc_evict_0} 0 root 59 - 0B 4176K CPU9 9 1:03 84.05% kernel{arc_evict_1} 0 root 59 - 0B 4176K CPU10 10 0:51 80.14% kernel{arc_evict_2} (while) dT: 1.000s w: 1.000s L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name 0 326 326 5646 0.167 0 0 0.000 5.0| nda0 0 374 374 6334 0.105 0 0 0.000 3.6| nda1 ------------------------------------- SNIP ------------------------------------- If the cache is too low I would assume that it has to access the disks more often so that their busy times go up - as it was under the "old" FreeBSD's = own ZFS... --=20 You are receiving this mail because: You are on the CC list for the bug.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-275594-3630-Z7Bbj4AkNk>