Date: Tue, 15 Aug 2023 21:33:34 +0200 From: Alexander Leidinger <Alexander@Leidinger.net> To: Mateusz Guzik <mjguzik@gmail.com> Cc: current@freebsd.org Subject: Re: Speed improvements in ZFS Message-ID: <ed1f82dd26d3cc9ec9cc16505109ec40@Leidinger.net> In-Reply-To: <CAGudoHG5Fgg4184SsXhzqYRR7VPaBXZoirGvyRyJX5ihX5YG-A@mail.gmail.com> References: <61ca9df1b15c0e5477ff51196d0ec073@Leidinger.net> <CAGudoHG5Fgg4184SsXhzqYRR7VPaBXZoirGvyRyJX5ihX5YG-A@mail.gmail.com>
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Am 2023-08-15 14:41, schrieb Mateusz Guzik: > With this in mind can you provide: sysctl kern.maxvnodes > vfs.wantfreevnodes vfs.freevnodes vfs.vnodes_created vfs.numvnodes > vfs.recycles_free vfs.recycles After a reboot: kern.maxvnodes: 10485760 vfs.wantfreevnodes: 2621440 vfs.freevnodes: 24696 vfs.vnodes_created: 1658162 vfs.numvnodes: 173937 vfs.recycles_free: 0 vfs.recycles: 0 > Meanwhile if there is tons of recycles, you can damage control by > bumping kern.maxvnodes. Looks like there are not much free directly after the reboot. I will check the values tomorrow after the periodic run again and maybe increase by 10 or 100 so see if it makes a difference. > If this is not the problem you can use dtrace to figure it out. dtrace-count on vnlru_read_freevnodes() and vnlru_free_locked()? Or something else? Bye, Alexander. -- http://www.Leidinger.net Alexander@Leidinger.net: PGP 0x8F31830F9F2772BF http://www.FreeBSD.org netchild@FreeBSD.org : PGP 0x8F31830F9F2772BF
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