我正在编写一个脚本，根据某些条件应该查询大量数据并分别移动到某些存档表。我有超过五千万条记录要扫描并选择匹配的记录，以便对六个存档表执行INSERT操作。以下脚本适用于大约50万条记录，但在运行数百万条记录时会抛出以下异常
Error report:
ORA-04036: PGA memory used by the instance exceeds PGA_ AGGREGATE _LIMIT
除了增加PGA_ AGGREGATE _LIMIT之外，我想改进我的脚本，避免将所有记录加载到内存中，但运行脚本并将值插入到块中的表中。目前我不知道应该如何做到这一点。有人建议我通过批量运行脚本来避免内存不足的问题
下面的是我脚本的一部分（显示了将值插入到四个表中）。
CREATE OR REPLACE TYPE R1_ID_TYPE IS TABLE OF NUMBER;
/
CREATE OR REPLACE TYPE R5_ID_TYPE IS TABLE OF NUMBER;
/
DECLARE
R01_IDS R1_ID_TYPE;
R05_IDS R5_ID_TYPE;
BEGIN
--add the R05_IDs which are older than five years from R5_TABLE and R6_TABLE to R5_ID_TYPE nested table
SELECT R5.R05_ID AS R05_ID
BULK COLLECT INTO R05_IDS
FROM R6_TABLE R6 , R5_TABLE R5
WHERE R5.R05_ID = R6.R06_R05_ID_FK
AND R5.R05_DATE_TIME_CAPTURED <= TRUNC(SYSDATE) - 1825
AND R5.R05_STATUS = 'D'
AND R6.R06_STATUS = 'D';
-- Inserts all the deregistered records which are older than five years from R5_TABLE and R6_TABLE tables to the relevant archive tables
INSERT ALL
INTO R5_TABLE_archived(
R05_ID,
R05_R01_ID_FK,
R05_NUMBER,
R05_NUMBER_TYPE,
R05_STATUS,
R05_GSM_SUBSCRIBER_TYPE
R05_DATE_TIME_CAPTURED)
values (
R5_R05_ID,
R5_R05_R01_ID_FK,
R5_NUMBER,
R5_NUMBER_TYPE,
R5_R05_STATUS,
R5_R05_GSM_SUBSCRIBER_TYPE,
R5_R05_DATE_TIME_CAPTURED)
INTO R6_TABLE_archived(
R06_ID,
R06_R05_ID_FK,
R06_R08_ID_FK,
R06_STATUS,
R06_REFERENCE_NUMBER,
R06_DATE_TIME_CAPTURED,
R06_DATE_EXPIRED)
values (
R6_R06_ID,
R6_R06_R05_ID_FK,
R6_R06_R08_ID_FK,
R6_R06_STATUS,
R6_R06_REFERENCE_NUMBER,
R6_R06_DATE_TIME_CAPTURED,
R6_R06_DATE_EXPIRED)
SELECT R5_R05_ID,
R5_R05_R01_ID_FK,
R5_NUMBER,
R5_NUMBER_TYPE,
R5_R05_STATUS,
R5_R05_GSM_SUBSCRIBER_TYPE,
R5_R05_DATE_TIME_CAPTURED,
R6_R06_ID,
R6_R06_R05_ID_FK,
R6_R06_R08_ID_FK,
R6_R06_CHANGE_SOURCE,
R6_R06_REFERENCE_NUMBER,
R6_R06_DATE_TIME_CAPTURED,
R6_R06_DATE_EXPIRED
FROM
(
SELECT R5.R05_ID R5_R05_ID,
R5.R05_R01_ID_FK R5_R05_R01_ID_FK,
R5.R05_NUMBER R5_NUMBER,
R5.R05_NUMBER_TYPE R5_NUMBER_TYPE,
R5.R05_STATUS R5_R05_STATUS,
R5.R05_GSM_SUBSCRIBER_TYPE R5_R05_GSM_SUBSCRIBER_TYPE,
R5.R05_DATE_TIME_CAPTURED R5_R05_DATE_TIME_CAPTURED,
R6.R06_ID R6_R06_ID,
R6.R06_R05_ID_FK R6_R06_R05_ID_FK,
R6.R06_R08_ID_FK R6_R06_R08_ID_FK,
R6.R06_STATUS R6_R06_STATUS,
R6.R06_REFERENCE_NUMBER R6_R06_REFERENCE_NUMBER,
R6.R06_DATE_TIME_CAPTURED R6_R06_DATE_TIME_CAPTURED,
R6.R06_DATE_EXPIRED R6_R06_DATE_EXPIRED
FROM R6_TABLE R6 , R5_TABLE R5
WHERE R5.R05_ID = R6.R06_R05_ID_FK
AND R5.R05_DATE_TIME_CAPTURED <= TRUNC(SYSDATE) - 1825
AND R5.R05_STATUS = 'D'
AND R6.R06_STATUS = 'D');
--selects all the R01 IDs which matches with the above criteria and copy values to respective archive tables
SELECT UNIQUE R1.R01_ID AS R01_ID
BULK COLLECT INTO R01_IDS
FROM R1_TABLE R1, R5_TABLE R5
WHERE R5.R05_ID IN (Select column_value from table(R05_IDS))
AND R1.R01_ID NOT IN (
SELECT R01.R01_ID
FROM R1_TABLE R01,
R5_TABLE R05
WHERE R05.R05_STATUS != 'D'
AND R01.R01_ID = R05.R05_R01_ID_FK)
AND R1.R01_ID = R5.R05_R01_ID_FK;
--insert R1_TABLE tables values which matches with the above criteria into the R1_TABLE_ARCHIVED table
INSERT ALL
INTO R1_TABLE_ARCHIVED(R01_ID,R01_ID_TYPE,R01_IDENTITY_NUMBER,R01_PASSPORT_COUNTRY,R01_DATE_TIME_CAPTURED)
VALUES (RA1_R01_ID,RA1_R01_ID_TYPE,RA1_R01_IDENTITY_NUMBER,RA1_R01_PASSPORT_COUNTRY,RA1_R01_DATE_TIME_CAPTURED)
SELECT RA1_R01_ID,RA1_R01_ID_TYPE,RA1_R01_IDENTITY_NUMBER,RA1_R01_PASSPORT_COUNTRY,RA1_R01_DATE_TIME_CAPTURED
FROM (
SELECT
r1.R01_ID RA1_R01_ID,
r1.R01_ID_TYPE RA1_R01_ID_TYPE,
r1.R01_IDENTITY_NUMBER RA1_R01_IDENTITY_NUMBER,
r1.R01_PASSPORT_COUNTRY RA1_R01_PASSPORT_COUNTRY,
r1.R01_DATE_TIME_CAPTURED RA1_R01_DATE_TIME_CAPTURED
FROM
R1_TABLE r1
WHERE
r1.R01_ID IN (Select column_value from table(R01_IDS))
);
--insert R2_TABLE tables values which matches with the above criteria into the R2_TABLE_ARCHIVED table
INSERT ALL
INTO R2_TABLE_ARCHIVED(R02_ID,R02_R01_ID_FK,R02_fname,R02_SURNAME,R02_CONTACT_NUMBER,R02_DATE_TIME_CAPTURED)
VALUES(RA2_R02_ID,RA2_R02_R01_ID_FK,RA2_R02_fname,RA2_R02_SURNAME,RA2_R02_CONTACT_NUMBER,RA2_R02_DATE_TIME_CAPTURED)
SELECT RA2_R02_ID,RA2_R02_R01_ID_FK,RA2_R02_fname,RA2_R02_SURNAME,RA2_R02_CONTACT_NUMBER,RA2_R02_DATE_TIME_CAPTURED
FROM (
SELECT
r2.R02_ID RA2_R02_ID,
r2.R02_R01_ID_FK RA2_R02_R01_ID_FK,
r2.R02_fname RA2_R02_fname,
r2.R02_SURNAME RA2_R02_SURNAME,
r2.R02_CONTACT_NUMBER RA2_R02_CONTACT_NUMBER,
r2.R02_DATE_TIME_CAPTURED RA2_R02_DATE_TIME_CAPTURED
FROM
R2_TABLE r2
WHERE
r2.R02_R01_ID_FK IN (Select column_value from table(R01_IDS)));
--All the delete queries to remove the above copied values from the parent tables respectively
DELETE FROM R1_TABLE WHERE R01_ID IN (Select column_value from table(R01_IDS));
DELETE FROM R2_TABLE WHERE R02_R01_ID_FK IN (Select column_value from table(R01_IDS));
DELETE FROM R5_TABLE WHERE R05_R01_ID_FK IN (Select column_value from table(R05_IDS));
DELETE FROM R6_TABLE WHERE R06_R05_ID_FK IN (R05_IDS);
COMMIT;
END;
/
COMMIT;
答案 0 :(得分：1)
集合（和其他PL / SQL构造）存储在会话内存中。 （与存储在全局存储器中的查询数据不同）。因为会话内存是基于每个用户分配的，所以必须有一个限制，因为RAM仍然是一个相对昂贵的资源。
所以，你收到这个错误......
ORA-04036: PGA memory used by the instance exceeds PGA_ AGGREGATE _LIMIT
...因为你的会话已经占用了分配给PGA的所有内存（会话可用的内存池）。
问题是您正在尝试使用数百万行填充集合。即使那行非常狭窄，但仍未开启。幸运的是PL / SQL有一个解决方案：它是LIMIT子句。
使用LIMIT，我们可以用一大块结果集填充一个集合，处理它并获得下一个块。没有太大的改变：
DECLARE
R01_IDS R1_ID_TYPE;
R05_IDS R5_ID_TYPE;
cursor r5_cur is
SELECT R5.R05_ID
BULK COLLECT INTO R05_IDS
FROM R6_TABLE R6 , R5_TABLE R5
WHERE R5.R05_ID = R6.R06_R05_ID_FK
AND R5.R05_DATE_TIME_CAPTURED <= TRUNC(SYSDATE) - 1825
AND R5.R05_STATUS = 'D'
AND R6.R06_STATUS = 'D';
BEGIN
-- this is new
open r5_cur;
loop
fetch r5_cur
BULK COLLECT INTO R05_IDS limit 100000;
exit when R05_IDS.count() = 0;
-- this is all your code
-- Inserts all the deregistered records which are older than five years from R5_TABLE and R6_TABLE tables to the relevant archive tables
INSERT ALL
INTO R5_TABLE_archived(
R05_ID,
R05_R01_ID_FK,
R05_NUMBER,
R05_NUMBER_TYPE,
R05_STATUS,
R05_GSM_SUBSCRIBER_TYPE
R05_DATE_TIME_CAPTURED)
values (
R5_R05_ID,
R5_R05_R01_ID_FK,
R5_NUMBER,
R5_NUMBER_TYPE,
R5_R05_STATUS,
R5_R05_GSM_SUBSCRIBER_TYPE,
R5_R05_DATE_TIME_CAPTURED)
INTO R6_TABLE_archived(
R06_ID,
R06_R05_ID_FK,
R06_R08_ID_FK,
R06_STATUS,
R06_REFERENCE_NUMBER,
R06_DATE_TIME_CAPTURED,
R06_DATE_EXPIRED)
values (
R6_R06_ID,
R6_R06_R05_ID_FK,
R6_R06_R08_ID_FK,
R6_R06_STATUS,
R6_R06_REFERENCE_NUMBER,
R6_R06_DATE_TIME_CAPTURED,
R6_R06_DATE_EXPIRED)
SELECT R5_R05_ID,
R5_R05_R01_ID_FK,
R5_NUMBER,
R5_NUMBER_TYPE,
R5_R05_STATUS,
R5_R05_GSM_SUBSCRIBER_TYPE,
R5_R05_DATE_TIME_CAPTURED,
R6_R06_ID,
R6_R06_R05_ID_FK,
R6_R06_R08_ID_FK,
R6_R06_CHANGE_SOURCE,
R6_R06_REFERENCE_NUMBER,
R6_R06_DATE_TIME_CAPTURED,
R6_R06_DATE_EXPIRED
FROM
(
SELECT R5.R05_ID R5_R05_ID,
R5.R05_R01_ID_FK R5_R05_R01_ID_FK,
R5.R05_NUMBER R5_NUMBER,
R5.R05_NUMBER_TYPE R5_NUMBER_TYPE,
R5.R05_STATUS R5_R05_STATUS,
R5.R05_GSM_SUBSCRIBER_TYPE R5_R05_GSM_SUBSCRIBER_TYPE,
R5.R05_DATE_TIME_CAPTURED R5_R05_DATE_TIME_CAPTURED,
R6.R06_ID R6_R06_ID,
R6.R06_R05_ID_FK R6_R06_R05_ID_FK,
R6.R06_R08_ID_FK R6_R06_R08_ID_FK,
R6.R06_STATUS R6_R06_STATUS,
R6.R06_REFERENCE_NUMBER R6_R06_REFERENCE_NUMBER,
R6.R06_DATE_TIME_CAPTURED R6_R06_DATE_TIME_CAPTURED,
R6.R06_DATE_EXPIRED R6_R06_DATE_EXPIRED
FROM R6_TABLE R6 , R5_TABLE R5
WHERE R5.R05_ID = R6.R06_R05_ID_FK
AND R5.R05_DATE_TIME_CAPTURED <= TRUNC(SYSDATE) - 1825
AND R5.R05_STATUS = 'D'
AND R6.R06_STATUS = 'D');
--selects all the R01 IDs which matches with the above criteria and copy values to respective archive tables
SELECT UNIQUE R1.R01_ID AS R01_ID
BULK COLLECT INTO R01_IDS
FROM R1_TABLE R1, R5_TABLE R5
WHERE R5.R05_ID IN (Select column_value from table(R05_IDS))
AND R1.R01_ID NOT IN (
SELECT R01.R01_ID
FROM R1_TABLE R01,
R5_TABLE R05
WHERE R05.R05_STATUS != 'D'
AND R01.R01_ID = R05.R05_R01_ID_FK)
AND R1.R01_ID = R5.R05_R01_ID_FK;
--insert R1_TABLE tables values which matches with the above criteria into the R1_TABLE_ARCHIVED table
INSERT ALL
INTO R1_TABLE_ARCHIVED(R01_ID,R01_ID_TYPE,R01_IDENTITY_NUMBER,R01_PASSPORT_COUNTRY,R01_DATE_TIME_CAPTURED)
VALUES (RA1_R01_ID,RA1_R01_ID_TYPE,RA1_R01_IDENTITY_NUMBER,RA1_R01_PASSPORT_COUNTRY,RA1_R01_DATE_TIME_CAPTURED)
SELECT RA1_R01_ID,RA1_R01_ID_TYPE,RA1_R01_IDENTITY_NUMBER,RA1_R01_PASSPORT_COUNTRY,RA1_R01_DATE_TIME_CAPTURED
FROM (
SELECT
r1.R01_ID RA1_R01_ID,
r1.R01_ID_TYPE RA1_R01_ID_TYPE,
r1.R01_IDENTITY_NUMBER RA1_R01_IDENTITY_NUMBER,
r1.R01_PASSPORT_COUNTRY RA1_R01_PASSPORT_COUNTRY,
r1.R01_DATE_TIME_CAPTURED RA1_R01_DATE_TIME_CAPTURED
FROM
R1_TABLE r1
WHERE
r1.R01_ID IN (Select column_value from table(R01_IDS))
);
--insert R2_TABLE tables values which matches with the above criteria into the R2_TABLE_ARCHIVED table
INSERT ALL
INTO R2_TABLE_ARCHIVED(R02_ID,R02_R01_ID_FK,R02_fname,R02_SURNAME,R02_CONTACT_NUMBER,R02_DATE_TIME_CAPTURED)
VALUES(RA2_R02_ID,RA2_R02_R01_ID_FK,RA2_R02_fname,RA2_R02_SURNAME,RA2_R02_CONTACT_NUMBER,RA2_R02_DATE_TIME_CAPTURED)
SELECT RA2_R02_ID,RA2_R02_R01_ID_FK,RA2_R02_fname,RA2_R02_SURNAME,RA2_R02_CONTACT_NUMBER,RA2_R02_DATE_TIME_CAPTURED
FROM (
SELECT
r2.R02_ID RA2_R02_ID,
r2.R02_R01_ID_FK RA2_R02_R01_ID_FK,
r2.R02_fname RA2_R02_fname,
r2.R02_SURNAME RA2_R02_SURNAME,
r2.R02_CONTACT_NUMBER RA2_R02_CONTACT_NUMBER,
r2.R02_DATE_TIME_CAPTURED RA2_R02_DATE_TIME_CAPTURED
FROM
R2_TABLE r2
WHERE
r2.R02_R01_ID_FK IN (Select column_value from table(R01_IDS)));
--All the delete queries to remove the above copied values from the parent tables respectively
DELETE FROM R1_TABLE WHERE R01_ID IN (Select column_value from table(R01_IDS));
DELETE FROM R2_TABLE WHERE R02_R01_ID_FK IN (Select column_value from table(R01_IDS));
DELETE FROM R5_TABLE WHERE R05_R01_ID_FK IN (Select column_value from table(R05_IDS));
DELETE FROM R6_TABLE WHERE R06_R05_ID_FK IN (R05_IDS);
end loop;
close r5_cur;
COMMIT;
END;
/
不要忘记向下滚动END LOOP并关闭光标！
答案 1 :(得分：1)
表空间是物理存储的映射。除了要求您的DBA添加另一个数据文件之外，解决方法并不多。