Yes, having 4 is a little odd. We are struggling with this server. It sits almost idle most of the month then for 1 or 2 days it gets 60 to 80 thousand hits/hour. Not sure what to make of this current display of the swap space.
Bobby Bauer Center for Information Technology National Institutes of Health Bethesda, MD 20892-5628 301-594-7474 -----Original Message----- From: RPN01 [mailto:[email protected]] Sent: Wednesday, November 02, 2011 10:14 AM To: [email protected] Subject: Re: Odd swap space behavior That's what you want when you're using "spindles", but on z, you're usually talking about v-disks, which are really virtual disks in memory. When they're not in use, they take up no space at all, but when you start using them, they start to occupy real memory and become a burden. So you set priorities on the swap spaces so that they each get used one at a time in turn. Ideally, you don't want to use them at all; they're a safeguard to keep the image from coming down. When they are used, they're an indication that you need more memory allocated to the image, and they give you a buffer to get to the moment when you can safely cycle the image to add that memory. Having four swap spaces allocated seems like a bit of overkill to me. It should be sufficient to have one to be the buffer, and a second larger one to be the trigger to increase the size of the image. -- Robert P. Nix Mayo Foundation .~. RO-OC-1-18 200 First Street SW /V\ 507-284-0844 Rochester, MN 55905 /( )\ ----- ^^-^^ "In theory, theory and practice are the same, but in practice, theory and practice are different." On 11/2/11 8:25 AM, "Richard Higson" <[email protected]> wrote: > On Wed, Nov 02, 2011 at 07:37:17AM -0400, Bauer, Bobby (NIH/CIT) [E] wrote: > haven't done Linux on Z for a while, but I have always used the same > "Priority" for the swapdisks > so that linux could spread out the IO to several disks (preferably on separate > spindles). > This works well on x86 (real & VMware) and P-Series > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
