3

我正在编写一个脚本，其中应根据某些条件查询大量数据并分别移动到某些存档表中。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一百万条记录，但在运行数百万条记录时会引发以下异常

Error report:
ORA-04036: PGA memory used by the instance exceeds PGA_ AGGREGATE _LIMIT

除了增加 PGA_AGGREGATE _LIMIT 之外，我还想改进我的脚本，避免将所有记录加载到内存中，而是运行脚本并将值分块插入表中。目前我不知道该怎么做。有人可以建议我通过让脚本批量运行来避免内存不足的问题吗

下面是我的脚本的一部分（显示了将值插入四个表）。

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;
4

2 回答 2

1

集合（和其他 PL/SQL 结构）存储在会话内存中。（与存储在全局内存中的查询数据不同）。因为会话内存是按用户分配的，所以必须有一个限制，因为 RAM 仍然是一种相对昂贵的资源。

所以，你得到这个错误......

ORA-04036: PGA memory used by the instance exceeds PGA_ AGGREGATE _LIMIT

...因为您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）。

问题是您正试图用数百万行填充集合。即使那行很窄，但仍然没有。幸运的是 PL/SQL 有一个解决方案：它是 LIMIT 子句。

使用 LIMIT，我们可以用结果集的一个块填充一个集合，处理它并获取下一个块。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;
/

不要忘记向下滚动到 END LOOP 并关闭光标！

于 2017-12-14T08:19:13.490 回答
1

表空间是到物理存储的映射。除了要求您的 DBA 添加另一个数据文件外，没有太多的解决方法。

于 2017-12-14T11:29:49.680 回答