Hi I would.first unset all _target and max_size parameters in a pfile and use manual memory management. Then migrate to an spfile. Then migrate to SGA and PGA targets. On 11 Oct 2010 19:01, "Crisler, Jon" <Jon.Crisler@xxxxxxx> wrote: I have been trying to get hugepages working on 11gR1 without success. Has anybody been able to get this to work properly? In order to use hugepages, you have to turn off 11g ASMM which uses the /dev/shm memory mapping. Hugepages are configured properly in OS, /etc/security/limits.conf updated for hugepages. If I attempt to set memory_target and memory_max_target to zero (or reset them) then I get ORA-00849 SGA_TARGET ### cannot be set to more than MEMORY_MAX_TARGET. I am following technote 749851.1, and even opened a support case with Oracle, and I am not getting anywhere. Any clues as to what I am missing? Thanks- Jon -- //www.freelists.org/webpage/oracle-l