ora-27123 on Solaris 10 with larger than 1.6 - 1.7Gb SGA (Doc ID 390766.1)

Last updated on APRIL 06, 2015

Applies to:

Oracle Database - Enterprise Edition - Version 9.2.0.7 and later
Oracle Solaris on SPARC (64-bit)
Checked for relevance on 23 Jul 2012

Symptoms

Attempting to start and instance on Solaris 10 with greater than 1.6 - 1.7Gb SGA results in:-

ORA-27123: unable to attach to shared memory segment
SVR4 Error: 22: Invalid argument

Changes

ulimit for the environment of the Oracle user shows:-

time(seconds) unlimited
file(blocks) unlimited
data(kbytes) unlimited
stack(kbytes) unlimited
coredump(blocks) unlimited
nofiles(descriptors) 3072
vmemory(kbytes) unlimited

sgabeg is at :-

nm -P $ORACLE_HOME/bin/oracle|grep sgabeg
sgabeg n 20000000 0

Cause

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