Processo não encerra no S.O após matar sessão no Oracle 10g

[HitotuziParticipante]

free:

         total       used       free     shared    buffers     cached

Mem: 6105660 6040460 65200 0 30576 5518684
-/+ buffers/cache: 491200 5614460
Swap: 4031600 30492 4001108

---

SQL> SHOW PARAMETER SGA

NAME TYPE VALUE

---

lock_sga boolean FALSE
pre_page_sga boolean FALSE
sga_max_size big integer 1152M
sga_target big integer 1152M

SQL> SHOW PARAMETER PGA

NAME TYPE VALUE

---

pga_aggregate_target big integer 384M

SQL> SHOW PARAMETER CACHE

NAME TYPE VALUE

---

db_cache_advice string ON
db_cache_size big integer 0
db_keep_cache_size big integer 0
db_recycle_cache_size big integer 0
db_16k_cache_size big integer 0
db_2k_cache_size big integer 0
db_32k_cache_size big integer 0
db_4k_cache_size big integer 0
db_8k_cache_size big integer 0
object_cache_max_size_percent integer 10
object_cache_optimal_size integer 102400
session_cached_cursors integer 20

SQL> SHOW PARAMETER SHARED

NAME TYPE VALUE

---

hi_shared_memory_address integer 0
max_shared_servers integer
shared_memory_address integer 0
shared_pool_reserved_size big integer 34393292
shared_pool_size big integer 0
shared_servers integer 1
shared_server_sessions integer