Oracle Database Express Edition (XE)

Hi,

I have installed 11G XE to Linux CentOs 6.3.
I did increase sessions parameter value

-bash-4.1$ sqlplus '/as sysdba'

SQL*Plus: Release 11.2.0.2.0 Production on Thu Feb 7 07:06:42 2013

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit Production

SQL> alter system set sessions = 250 scope=spfile;

System altered.

SQL>

Here is file /u01/app/oracle/product/11.2.0/xe/dbs/spfileXE.ora content after change

XE.__java_pool_size=4194304
XE.__large_pool_size=4194304
XE.__oracle_base='/u01/app/oracle'#ORACLE_BASE set from environment
XE.__pga_aggregate_target=293601280
XE.__sga_target=545259520
XE.__shared_io_pool_size=0
XE.__shared_pool_size=318767104
XE.__streams_pool_size=4194304
*._disk_sector_size_override=TRUE
*.audit_file_dest='/var/log/oracle/admin/XE/adump'
*.cell_offload_processing=FALSE
*.compatible='11.2.0.0.0'
*.control_files='/u01/app/oracle/oradat^AC^@^@C"^@^@^C^@^@^@^@^@^@^@^@^@^A^DZ^\^@^@a/XE/control.dbf'
*.db_name='XE'
*.DB_RECOVERY_FILE_DEST='/u01/app/oracle/fast_recovery_area'
*.db_recovery_file_dest_size=26843545600
*.diagnostic_dest='/var/log/oracle'
*.dispatchers='(PROTOCOL=TCP) (SERVICE=XEXDB)'
*.filesystemio_options='SETALL'
*.job_queue_processes=4
*.memory_max_target=838860800
*.memory_target=838860800
*.open_cursors=800
*.plsql_code_type='NATIVE'
*.processes=200
*.remote_login_passwordfile='EXCLUSIVE'
*.sessions=250
*.shared_servers=4
*.undo_management='AUT^AC^@^@C"^@^@^D^@^@^@^@^@^@^@^@^@^A^DA^C^@^@O'
*.undo_tablespace='UNDOTBS1'

When I shutdown and start database I can see from alert log

Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit Production.
Using parameter settings in server-side spfile /u01/app/oracle/product/11.2.0/xe/dbs/spfileXE.ora
System parameters with non-default values:
  processes                = 200
  sessions                 = 322
  filesystemio_options     = "SETALL"
  _disk_sector_size_override= TRUE
  memory_target            = 800M
  memory_max_target        = 800M
  control_files            = "/u01/app/oracle/oradata/XE/control.dbf"
  compatible               = "11.2.0.0.0"
  db_recovery_file_dest    = "/u01/app/oracle/fast_recovery_area"
  db_recovery_file_dest_size= 25G
  undo_management          = "AUTO"
  undo_tablespace          = "UNDOTBS1"
  remote_login_passwordfile= "EXCLUSIVE"
  dispatchers              = "(PROTOCOL=TCP) (SERVICE=XEXDB)"
  shared_servers           = 4
  plsql_code_type          = "NATIVE"
  job_queue_processes      = 4
  audit_file_dest          = "/var/log/oracle/admin/XE/adump"
  cell_offload_processing  = FALSE
  db_name                  = "XE"
  open_cursors             = 800
  diagnostic_dest          = "/var/log/oracle"

And when I check sessions parameter value

-bash-4.1$ sqlplus '/as sysdba'

SQL*Plus: Release 11.2.0.2.0 Production on Thu Feb 7 07:11:09 2013

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit Production

SQL> show parameter sessions

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
java_max_sessionspace_size           integer     0
java_soft_sessionspace_limit         integer     0
license_max_sessions                 integer     0
license_sessions_warning             integer     0
sessions                             integer     322
shared_server_sessions               integer
SQL>

Why sessions parameter value is 322 even I did set it to 250?

Regards,
Jari
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