简单查看oracle的连接情况和内存使用情况.

select machine,count(*) from v$session group by machine;


select machine,status,count(*) from v$session group by machine,status order by status;




select "SGA" AS NAME,ROUND(sum(value)/1024/1024,2)||"M" AS "SIZE(M)" from v$sga
UNION
select "PGA" AS NAME,ROUND(value/1024/1024,2)||"M" AS "SIZE(M)" from v$pgastat where name="total PGA allocated"
UNION
select "TOTAL" AS NAME,((SELECT ROUND(sum(value)/1024/1024,2) from v$sga)+(select ROUND(value/1024/1024,2) from v$pgastat where name="total PGA allocated"))||"M" AS "SIZE(M)" FROM DUAL
UNION

SELECT NAME,TO_CHAR(VALUE) FROM V$PGASTAT WHERE NAME="process count";

Oracle 11g设置内存自动管理:

ALTER SYSTEM SET MEMORY_TARGET = 1024M SCOPE=SPFILE;
ALTER SYSTEM SET memory_max_target = 1500M SCOPE=SPFILE;
ALTER SYSTEM SET SGA_TARGET = 0 SCOPE=SPFILE;
ALTER SYSTEM SET SGA_MAX_SIZE=800M SCOPE=SPFILE;
ALTER SYSTEM SET PGA_AGGREGATE_TARGET = 0 SCOPE=SPFILE;
alter system set pre_page_sga=FALSE scope=spfile;