SQL> !vmstat -S
 kthr      memory            page            disk          faults      cpu
 r b w   swap  free  si  so pi po fr de sr m0 m1 m3 m4   in   sy   cs us sy id
 0 0 0 5864088 5114360 0  0 114122802779 166 164 0 0 1 3 -0 -0 16470 30371 15706 4 3 94

SQL> set pages 200 lines 132
select server, count(1) from v$session
group by server;SQL>   2

SERVER      COUNT(1)
--------- ----------
DEDICATED       2538

NAME                                          VALUE UNIT
---------------------------------------- ---------- ------------
aggregate PGA target parameter           2097152000 bytes
aggregate PGA auto target                 131072000 bytes
global memory bound                       209715200 bytes
total PGA inuse                          3829838848 bytes
total PGA allocated                      6324478976 bytes
maximum PGA allocated                    6921444352 bytes
total freeable PGA memory                 641400832 bytes
process count                                  2561
max processes count                            2850
PGA memory freed back to OS              7.7713E+10 bytes
total PGA used for auto workareas           2102272 bytes
maximum PGA used for auto workareas       150141952 bytes
total PGA used for manual workareas               0 bytes
maximum PGA used for manual workareas        537600 bytes
over allocation count                        400469
bytes processed                          1.9377E+11 bytes
extra bytes read/written                 6706253824 bytes
cache hit percentage                          96.65 percent
recompute count (total)                      403688

ps -eorss,args | nawk 'END { print s/1024, "MB" } /ssh/ { s += $1 }'
658.383 MB
ps -eorss,args | nawk 'END { print s/1024, "MB" } /java/ { s += $1 }'
5800.34 MB

ps -eorss,args | grep -v oracleavt31 | grep -v java | grep -v PasswordAuthentication=no | grep -v oracleavt31 | grep -v asm | grep -v ora_ | nawk 'END { print s/1024, "MB" }  { s += $1 }'
1281.53 MB

ps -ef | grep PasswordAuthentication
oracle  2230  2190   0   Sep 16 ?           0:00 /usr/bin/ssh -o FallBackToRsh=no -o PasswordAuthentication=no -o StrictHostKeyC