Oracle 11G: Reading data directly from oracle instance memory using "oradebug direct_access"

Use Oradebug direct_access to directly read data from x$tables

SQL> oradebug help direct_access

DIRECT_ACCESS  <set/enable/disable command | select query> Fixed table access

oradebug direct_access [enable/disable] trace - to start/stop writing data to trace file

Select Sample - getting information about library cache:

SQL> oradebug setmypid
Statement processed.

SQL> oradebug direct_access SELECT * FROM X$KSMLRU
ADDR    = D28F85C
INDX    = 0
INST_ID = 1
KSMLRIDX        = 1
KSMLRDUR        = 0
KSMLRSHRPOOL    = 1
KSMLRCOM        =
KSMLRSIZ        = 0
KSMLRNUM        = 0
KSMLRHON        =
KSMLROHV        = 0
KSMLRSES        = 0
KSMLRADU        = 0
KSMLRNID        = 0
KSMLRNSD        = 0
KSMLRNCD        = 0
KSMLRNED        = 0

"Where" clause is not supported:

SQL> oradebug direct_access SELECT * FROM X$KSMLRU WHERE KSMLRSIZ > 0
ORA-00933: SQL command not properly ended