David Boyes wrote: >1) Move this to a VM environment. The I/O caching and optimization in >the VM environment significantly helps Oracle performance. Giving this >about .5G of XSTORE for MDISK cache and VDISK helps immensely.
This strikes me as odd, seeing as databases usually want all the layers below them to get out of the way as much as possible; they perform all the caching they need themselves. In fact, Oracle was one of the folks who lobbied the most for getting 'raw' (uncached by the Linux kernel) device access, and this did in fact turn out to improve Oracle performance (on Linux/Intel). Do you have performance data comparing the scenarios? Bye, Ulrich -- Dr. Ulrich Weigand [EMAIL PROTECTED]
