Date: Sun, 12 Aug 2012 15:44:07 -0700 From: Colin Percival <cperciva@freebsd.org> To: FreeBSD current <freebsd-current@freebsd.org> Subject: Time to bump default VM_SWZONE_SIZE_MAX? Message-ID: <502831B7.1080309@freebsd.org>
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Hi all, If I'm understanding things correctly, the "maxswzone" value -- set by the kern.maxswzone loader tunable or to VM_SWZONE_SIZE_MAX by default -- should be approximately 9 MiB per GiB of swap space. The current default for VM_SWZONE_SIZE_MAX was set in August 2002 to 32 MiB; meaning that anyone who wants to use more than ~ 3.5 GB of swap space ought to set kern.maxswzone in /boot/loader.conf. Is it time to increase this default on amd64? (I understand that keeping the value low on i386 is important due to KVA limitations, but amd64 has far more address space available...) -- Colin Percival Security Officer Emeritus, FreeBSD | The power to serve Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid
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