So, you're renovating your page datasets. How do you do that? Do you take a hammer and chisel and carve out some extra space on the disk? (I couldn't resist - its almost Friday).
Actually, as others have pointed out, swap datasets are pretty much dead. The paging algorithms have been changed to efficiently swap to the regular page datasets. Just make sure that you leave them about two thirds empty during peak periods, which you can monitor using RMF reports. Eric ---- "Chase wrote: > Hi, All, > > We're renovating our page dataset allocations (z/OS 1.7 -> 1.9) and > found that our previously-used DEFINE specs from "many moons ago" need > "tweaking" beyond space and volser; specifically, SWAP vs NOSWAP. From > reading the following: > > SWAP|NOSWAP > specifies whether page space is defined for > local system queue area (LSQA) pages or for pageable private area pages. > (Auxiliary storage management separates private area address space pages > into LSQA pages and pageable private area pages.) > > SWAP Specifies that the page space is a > high-speed data set used during a swap operation to store and retrieve > the set of LSQA pages owned by an address space. > > NOSWAP Indicates that the page space is a > conventional page space used to record pageable private area pages. > > It appears that we should take the default of NOSWAP for our LOCALs and > PLPA/COMMON datasets. But since we don't currently "swap-out" address > spaces like "in the old days" (we don't have any specific SWAP > datasets), should we consider defining a subset of our new page datasets > with the SWAP parameter? If so, how many or what proportion? Since > nowadays just about everything is a "high-speed data set" (device), > would it make a measurable difference one way or the other? > > Any advice / recommendations / caveats would be appreciated. > > TIA, > > -jc- -- Eric Bielefeld Systems Programmer Aviva USA Des Moines, Iowa 515-645-5153 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
