-----Original Message----- From: Lew Wolfgang <wolfgang@sweet-haven.com> Reply-to: wolfgang@sweet-haven.com To: OS-en <opensuse@opensuse.org> Subject: [opensuse] How Much Swap? Date: Wed, 26 Jun 2013 07:12:53 -0700 Hi Folks, Back in the '80s we configured swap space to be 1.5 x RAM as a rule of thumb. But I'm configuring 6 boxes now that contain 64-GB of RAM and I'm wondering if swap should be anything close to 96-GB. The boxes have only 128-GB of SSD for the operating system, so I'd like to minimize swap as much as possible. As background, these devices will be used as dedicated data acquisition devices. They will pump data from four Gig-E Ethernet ports and store it all in a 24-disk RAID-6 array. Preliminary measurements show we should be able to maintain continuous throughput until the RAID is full. So, any opinions on swap size in relation to RAM? -----Original Message----- Indeed Lew, that amount of swap would be rediculous. However, still swap area should be considered as a "safety-lane" So keep one of a couple a gigs and turn the "swappiness" of the system low (5). Often it is "60", see: /proc/sys/vm/swappiness -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org