Unix system memory

UNIX for Beginners Q & A UNIX for Dummies Questions & Answers
1

Can you please tell me how to find out System Memory (RAM) for a AIX unix server?
The command prtconf will do for Solaris but I don't know for AIX Unix.

2

As root: bootinfo -r
As any user: lsattr -E -l sys0 -a realmem