In my experience if you are regularly using the swap you need more ram. You would do better to add a gig of ram then a flash device. this assumes you dont have some extraordinary use which requires allot of data movement making the swap necessary in which case I would still look at adding more ram or another hard disk. Hard drives are going for .10-.50 a gig definately worth it On Thu, Dec 3, 2009 at 8:35 PM, Stephen wrote: > I do but its in production as a xenserver... > > when we migrate the VM's off of it ill have some time to do this > experiment. > > On Thu, Dec 3, 2009 at 7:30 PM, Bob Elzer wrote: > > What about a large database maybe a couple of terabytes, and maybe lots > of > > users. > > > > And then lets say we spread our 6GB of swap over several disks. > > > > Maybe a system with 32GB of memory, and dual quad processors. > > > > Maybe we could run some tests, anybody have a system like this ??? > > > > What does ebay and amazon and new egg run on, I heard they were doing > lots > > of processing for black Friday ? > > > > Well maybe. > > > > > > > > -----Original Message----- > > From: plug-discuss-bounces@lists.plug.phoenix.az.us > > [mailto:plug-discuss-bounces@lists.plug.phoenix.az.us] On Behalf Of Kurt > > Granroth > > Sent: Thursday, December 03, 2009 5:06 PM > > To: plug-discuss@lists.plug.phoenix.az.us > > Subject: Re: FLASH disk as swap > > > > On 12/3/09 9:39 AM, der.hans wrote: > >> Having swap be 1.5 times the size of ram is good, double the size of > >> ram is better. > > > > Those are old-school heuristics from back in the day when 32 MB was a lot > of > > RAM. I stretch to think of a case where 6-8 GB of swap would come into > play > > at *all*. That is, if you have a case where the system is using > multi-gig > > amounts of swap, then I can almost guarantee that it is utterly unusable. > > One could say that it's there as a "just-in-case"... but I'm having a > hard > > time buying that. Unusable is unusable. It would take so incredibly > long > > to recover that any production server would have long been rebooted or > > managed some other way. > > > > I think I did 2x RAM up until I had 512MB and then 1x RAM until I got to > > 1GB. Then I was .5x at 2GB RAM and finally .25x now ;-) > > --------------------------------------------------- > > PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us > > To subscribe, unsubscribe, or to change your mail settings: > > http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss > > > > --------------------------------------------------- > > PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us > > To subscribe, unsubscribe, or to change your mail settings: > > http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss > > > > > > -- > A mouse trap, placed on top of your alarm clock, will prevent you from > rolling over and going back to sleep after you hit the snooze button. > > Stephen > --------------------------------------------------- > PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us > To subscribe, unsubscribe, or to change your mail settings: > http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss > -- James Finstrom Rhino Equipment Corp. http://rhinoequipment.com ~ http://postug.com Phone: 1-877-RHINO-T1 ~ FAX: +1 (480) 961-1826 Twitter: http://twitter.com/rhinoequipment IP: guest@asterisk.rhinoequipment.com