Date: Sat, 14 Jul 2018 05:31:30 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 229764] Default settings allow system to wire all ram Message-ID: <bug-229764-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D229764 Bug ID: 229764 Summary: Default settings allow system to wire all ram Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: FreeBSD@ShaneWare.Biz vfs.zfs.arc_max has a default of "all RAM less 1 GB, or one half of RAM, whichever is more." - from handbook 19.6.1. Memory used by ARC is wired to prevent it being swapped out. vm.max_wired has a default setting of 30% of physical ram which limits what= the kernel allocates as wired. Currently, these two values that limit the amount of wired ram do not inter= act in any way. This means the default settings allow more than 100% of physical ram to be allocated as wired. This is an unrecoverable situation. The default for arc_max should be reduced to less than 70% of physical ram. I believe that setting arc_max should also be prevented from going higher t= han physical ram minus max_wired minus a safety buffer. --=20 You are receiving this mail because: You are the assignee for the bug.=
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