1)檢查oracle系統臨時表空間大小:
select sum(bytes)/1024/1024 "temp size(M)" from dba_temp_files where tablespace_name='TEMP';
2)查詢undo表空間大小
select sum(bytes)/1024/1024 "current undo size(M)" from dba_data_files where tablespace_name='UNDOTBS1';
3)查詢SGA和PGA:
SQL> show parameter sga;
獲得sga_max_size和sga_target的值
SQL> show parameter pga;
獲得pga_aggregate_target的值
參考值:
現場服務器是8G內存,SGA設置爲4G,PGA設置爲1G
現場服務器是16G內存,SGA設置爲10G,PGA設置爲2G
現場服務器是32G內存,SGA設置爲20G,PGA設置爲4G
修改方法:
pfile:
sga_max_size=4G
sga_target=4G
pga_aggregate_target=1G
spfile:
SQL> alter system set sga_max_size=4G scope=spfile;
SQL> alter system set sga_target=4G scope=spfile;
SQL> alter system set pga_aggregate_target=1G scope=spfile;