SELECT * FROM V$SGASTAT

POOL NAME BYTES
null fixed_sga 454744
null buffer_cache 125829120
null log_buffer 3066880
shared pool errors 9572
shared pool enqueue 213556
shared pool KGK heap 2092
shared pool KQR M PO 184856
shared pool KQR S PO 17920
shared pool KQR S SO 2560
shared pool sessions 543600
shared pool sql area 845564
shared pool 1M buffer 2098176
shared pool KGLS heap 350832
shared pool processes 192000
shared pool db_handles 144000
shared pool parameters 1044
shared pool free memory 20249580
shared pool transaction 264132
shared pool PL/SQL DIANA 424284
shared pool FileOpenBlock 438232
shared pool PL/SQL MPCODE 139192
shared pool library cache 1805432
shared pool miscellaneous 6274620
shared pool MTTR advisory 16928
shared pool PLS non-lib hp 2944
shared pool joxs heap init 4220
shared pool sim memory hea 29636
shared pool table definiti 56
shared pool trigger defini 460
shared pool trigger inform 464
shared pool trigger source 100
shared pool dictionary cache 1614976
shared pool ksm_file2sga region 370496
shared pool KSXR receive buffers 1033000
shared pool character set object 318524
shared pool FileIdentificatonBlock 156352
shared pool KSXR large reply queue 166584
shared pool message pool freequeue 665792
shared pool KSXR pending messages que 841036
shared pool event statistics per sess 2520000
shared pool fixed allocation callback 228
large pool free memory 16777216
java pool free memory 159383552