Date: Sun, 02 Nov 2025 11:48:06 +0100 From: Alexander Leidinger <Alexander@Leidinger.net> To: Doug Ambrisko <ambrisko@ambrisko.com> Cc: Peter Eriksson <pen@lysator.liu.se>, Rick Macklem <rick.macklem@gmail.com>, FreeBSD CURRENT <freebsd-current@freebsd.org>, Garrett Wollman <wollman@bimajority.org>, Alexander Motin <mav@freebsd.org> Subject: Re: RFC: How ZFS handles arc memory use Message-ID: <22b478c6bad8212c61ca19a983a8e2e4@Leidinger.net> In-Reply-To: <aQKB6P3HNKVNQGip@ambrisko.com> References: <CAM5tNy5b3=04zC84Q_c60A9qssZTEY2n73okXoFPeT%2BYSK25JQ@mail.gmail.com> <F848B1F3-DE79-49D3-8D1C-1CB1BB2055E3@lysator.liu.se> <aQKB6P3HNKVNQGip@ambrisko.com>
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[-- Attachment #1 --] Am 2025-10-29 22:06, schrieb Doug Ambrisko: > It seems around the switch to OpenZFS I would have arc clean task > running > 100% on a core. I use nullfs on my laptop to map my shared ZFS /data > partiton into a few vnet instances. Over night or so I would get into > this issue. I found that I had a bunch of vnodes being held by other > layers. My solution was to reduce kern.maxvnodes and vfs.zfs.arc.max > so > the ARC cache stayed reasonable without killing other applications. > > That is why a while back I added the vnode count to mount -v so that > I could see the usage of vnodes for each mount point. I made a script > to report on things: Do you see this also with the nullfs mount option "nocache"? Bye, Alexander. -- http://www.Leidinger.net Alexander@Leidinger.net: PGP 0x8F31830F9F2772BF http://www.FreeBSD.org netchild@FreeBSD.org : PGP 0x8F31830F9F2772BF [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEER9UlYXp1PSd08nWXEg2wmwP42IYFAmkHNvUACgkQEg2wmwP4 2IYXJBAAm0JDwlME1UpQzqxJUo5BCWL8BaMUzMg9NlW2oq75Xs5/WrSbrGnsP+FI 7oWRuU04LUXHTvC4DAiWGsGe7z8UzNBpIAwNbWsrmIF6Cy10natpcbnTymFZvhle fAkgLO02fu5zurg9MviSX0LW+ljkre8SUX1e5H8BO69pEc7b56zObIn65Ob99mW0 SvlkndM7vNt76rWNOxc8ublwDRPDUYoa5aibHSTK4mQZDx1VABvorRo06TEwD9zZ dhUHcNL+krciiaVTSSl5MRPf7AgMcjqtYz98jxjVYiZr8RIuASSe0sLDjc1v+MCc bnkPMl2trao0E93S9xmwT6MzKaArNjJsUsPJcWID+E1AxjF/kagXuyws8rZz4BH3 topmTq3yPsFUTcP2YftdEOZcABo2wDJAWv6SPCw+pO4a2ieH7EQHJ2IryIJhBBDB LE2zUs1bEOJUClt8n2ih/qY5dbMbwdBnMr9d8jonpTt4WtB9fHQ//p3gkJ+HlsUS RSGEGzmthHCopdqVTUr6UDfE4srEdJmstl00ekQBJ6UPQBP3K64xMWLL0vXxtrKD BOMhZuwmeJGGc//pcvMXYXm+3G5pafWuQIpxIY3G2NKZJ2yoFK/F9p43ffiq18bB pPsiKKuhpslCww9Ks2Rt2zCCs05e6a6byA6a/bwm9Ed/YsfhL/Q= =K2MD -----END PGP SIGNATURE-----home | help
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