SQL> show parameter sga;
NAME
------------------------------------ ---------------------------------------------
lock_sga boolean FALSE
pre_page_sga boolean FALSE
sga_max_size big integer 892M
sga_target big integer 892M
一、對sga_max_size提高、降低的限制
1、用戶調高sga_max_size,不對sga_target進行修改,重啓oracle時,sga_max_size會相應變化
SQL> alter system set sga_max_size=1024mscope=spfile;
System altered.
SQL> show parameter sga;
NAME TYPE VALUE
------------------------------------ ---------------------------------------------
lock_sga boolean FALSE
pre_page_sga boolean FALSE
sga_max_size big integer 892M
sga_target big integer 892M
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup
ORACLE instance started.
Total System Global Area 1073741824 bytes
Fixed Size 2026296 bytes
Variable Size 377488584 bytes
Database Buffers 687865856 bytes
Redo Buffers 6361088 bytes
Database mounted.
Database opened.
SQL> show parameter sga
NAME TYPE VALUE
------------------------------------ ---------------------------------------------
lock_sga boolean FALSE
pre_page_sga boolean FALSE
sga_max_size big integer 1G
sga_target