Intermediate SQL Color Coded SQL, UNIX and Database Essays


Can ORACLE 11g memory_target work with AIX large pages ?

One of my readers recently asked me if ORACLE 11g can use memory_target along with AIX large pages … (Thanks Randolf!)

At the first blush this seems to be impossible. The main reason, of course, is that memory_target and large pages are used for the purposes that are, in fact, completely opposite!

  • The goal of 11g memory_target is to flow memory efficiently between ORACLE SGA and PGA to the place where it is most needed. This means that SGA may reduce its size from time to time, releasing memory to the operating system
  • AIX large pages, on the other hand, are designed to never leave physical memory

I hope, you can see a contradiction here …