Found it finally:
https://support.oracle.com/CSP/main/article?cmd=show&type=NOT&doctype=PROBLEM&id=790205.1
UNABLE TO START INSTANCE WITH LARGE SGA ORA-27102 SVR4 ERROR: 22: INVALID ARGUMENT [ID 790205.1]\
Solaris 10 memory management conflicts with Automatic PGA Memory Management [ID 460424.1]
Citation (this is what I do):
“…Sleep 5 minutes between the shutdown abort and startup (this doesn’t always work) …”
Workaround: “…Essentially the /etc/system settings disable Large Page Out Of Box (LPOOB) support which was enabled by default with Solaris 10…”
One more:
“Solaris 10 memory management conflicts with Automatic PGA Memory Management [ID 460424.1]“
Yegawds! It really gives one a great sense of confidence when using Solaris – an Oracle OS – one has to turn off largepage support in order to speed-up shutdown and start-up…
Unbelievable! Give me Aix or Linux any day…