Date: Fri, 3 Mar 2006 08:04:55 -0500 From: Michael Proto <mike@jellydonut.org> To: freebsd-stable@freebsd.org Subject: Re: RELENG_4 on flash disk and swap Message-ID: <44083EF7.8000500@jellydonut.org>
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In this case I'd just ignore swap. Since /dev/md0 is only a memory disk anyway, you don't really buy anything by having it as swap as opposed to unallocated RAM. Just make sure that all your running programs are able to fit in the 256Mb of RAM you have, otherwise processes will fail to start or others will die when they need to allocate additional RAM. I'm running FreeBSD in 64Mb with no swap and it works fine. A few sysctls that I've found helpful for running without swap: vm.swap_enabled=0 vm.disable_swapspace_pageouts=1 kern.ipc.shm_use_phys=1 -Proto Dmitry Pryanishnikov wrote: > Hello! > > Suppose I have machine with 256Mb of RAM and 256Mb flash ATA disk-on-module. > What configuration (using RELENG_4) should I select: > > 1. No swap at all. > 2. /dev/md0 (default 10Mb) added as a swap device. > > In other words, does RELENG_4 kernel work stable and robust w/o swap or > should I provide a minimum-size swap device? Which configuration (1 or 2) > will give more robustness in case of physical memory shortage? > > Sincerely, Dmitry
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