I believe it's the Linux kernel overhead taking away from the 4GB you thought you had. You can get away with 2GB or so - less than that will certainly incur a lot of swapping. Just make sure all the other prereqs are there and then use the -ignoreSysprereqs flag on the installer - the amount you actually need depends on the features you install.
Moving forward, it's what you need at runtime, pretty much the same calculation you had before (SGA, PGA, Oracle kernel, Linux kernel, etc). And, no, I don't want to get into the wider discussion of why that 4GB number is there :-) Cheers Damian -----Original Message----- From: RPN01 [mailto:[email protected]] Sent: 03 August 2011 16:26 To: [email protected] Subject: Oracle 11G on zLinux We¹re in the process of doing an Oracle 11g install for proof of concept, and we¹ve run into the 4gig memory issue. We gave the machine 4g of memory, but it came up with an actual value of 3.9255gig and failed. Why is 4gig not 4gig? And, how much memory actually has to be allocated to install? Does that amount really have to be left in the image moving forward? How are other sites configuring Oracle on zLinux? -- 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." ---------------------------------------------------------------------- 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/
