簡單查看oracle的連接情況和內存使用情況

1、查看連接oracle的所有機器的連接數

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

2、查看連接oracle的所有機器的連接數和狀態

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

3、oracle的PGA、SGA和process count

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';

5、Oracle 11g設置內存自動管理:

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;

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總結

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