Sql server 来自Oracle的SQLServer发布

我们的一位客户拥有一台Oracle 10.2.0.5RAC（HPUX）和两台SQL Server 2012（

Windows Server 2008R2

）。我们正在帮助他们将数据从Oracle发布到SQL Server。他们还需要知道哪些行被添加、更新和删除，但他们不想修改自己的应用程序

整个过程是这样的：

Oracle作为发布服务器->SQL Server A作为分发服务器->SQL Server B作为分发服务器 订户

我们的DBA已经通过SSMS（SQLServerManagementStudio）像这样配置了所有的数据库。这几天效果很好。但是Oracle的性能越来越差。最后，我们必须停止Oracle的数据发布

事实证明，SSMS将在Oracle中创建一个名为“HREPL”的包，其中包含一个名为“

PollEnd

”的过程。“

PollEnd

”将以非常高的频率执行，以删除表“

HREPL\u ARTICLE1LOG\u 1

”中的数据。但是“

PollEnd

”的执行时间会随着时间的推移而增加。最后，执行时间超过了执行的时间跨度，并且表被锁定，Oracle的性能将非常差

我们被困在这里

有人知道怎么解决这个问题吗？请帮忙

“PollEnd”程序：

-----------------------------------------------------------------------------------
--
--  Name:    PollEnd
--  Purpose: PollEnd request signifies that the change entries identified with the current
--           interval have been successfully entered into the store and forward database
--           and can be deleted from the article log tables.
--  Input:
--           argLSN         IN RAW(10)      LSN from distributor that was associated
--                                          with this poll interval
--  Output:
--  Notes:   This request causes those entries of the article log tables represented in the
--           Poll Table and having the current pollid to be deleted from both their article log
--           tables and from the Poll Table. The last request value is updated to reflect a
--           PollEnd request.
--
-----------------------------------------------------------------------------------
PROCEDURE PollEnd
(
    argLSN      IN RAW
)
AS
    SQLCommand      VARCHAR2(500);
    LogTable        VARCHAR2(255);
    CurrentPollID   NUMBER;
    TableIDs        number_tab;
    InstanceIDs     number_tab;
    IDCount         BINARY_INTEGER;
    PublisherLSN    RAW(10);

BEGIN
    -- Put the published tableIDs in a PL/SQL table of IDs
    HREPL.GetTableIDs(TableIDs, InstanceIDs);

    -- Get the current Poll ID
    SELECT Publisher_CurrentPollid INTO CurrentPollID FROM HREPL_Publisher;

    IDCount := TableIDs.COUNT;
    -- For each table represented in the ID list
    FOR id_ind IN 1 .. IDCount
    LOOP

        LogTable := REPLACE( REPLACE(ArticleLogTemplate, MatchString, TO_CHAR(TableIDs(id_ind))),
                                                         MatchStringY, TO_CHAR(InstanceIDs(id_ind)));

        BEGIN
            -- Generate command to delete from the article log those entries appearing in the
            -- Poll Table with the current PollID
            SQLCommand := 'DELETE FROM ' || LogTable || ' l ' ||
                              'WHERE EXISTS (SELECT p.POLL_POLLID FROM HREPL_POLL p ' ||
                              '              WHERE CHARTOROWID(l.ROWID) = p.Poll_ROWID '  ||
                              '              AND p.Poll_PollID = :Pollid)';

            HREPL.ExecuteCommandForPollID(SQLCommand, CurrentPollID);

        EXCEPTION
            WHEN OTHERS THEN NULL;
        END;
    END LOOP;

    FOR POLLID IN (SELECT CurrentPollid FROM DUAL)
    LOOP
        -- Delete from HREPL_Event those entries appearing in the Poll Table
        -- with the current PollID.
        DELETE FROM HREPL_Event e
        WHERE EXISTS (SELECT p.POLL_POLLID FROM HREPL_POLL p
                      WHERE CHARTOROWID(e.ROWID) = p.Poll_ROWID
                      AND p.Poll_PollID = POLLID.CurrentPollID);

        -- Delete entries from the Poll Table having the current Pollid
        DELETE FROM HREPL_Poll
        WHERE Poll_PollID = POLLID.CurrentPollID;
    END LOOP;

    -- Drop all views associated with articles that are marked as UnPublishPending.
    -- Note:  We cannot perform these drops in UnPublish table, since UnPublish
    --        table can execute concurrently with PollBegin and the querying
    --        of published tables by the log reader.  PollEnd, however, executes
    --        synchronously with respect to these activities, so can be used
    --        to cleanup log tables and views that are no longer needed.
    HREPL.CleanupLogsandViews;

    -- Mark the last request as PollEnd, and update the Publisher LSN
    -- to reflect the LSN committed at the publisher.
    UPDATE  HREPL_Publisher
    SET Publisher_PollInProcess = NoPollInProcess,
        Publisher_LSN = argLSN;

    -- Commit transaction
    COMMIT;

EXCEPTION
    WHEN OTHERS THEN
        ROLLBACK;
        RAISE;

END PollEnd;

编辑01:

全套资料如下：

编辑02:

最后我们放弃了。微软和甲骨文互相指责

我们尝试使用ogg将数据从oracle复制到sql server，这也很混乱

现在我们正在尝试使用ogg将数据从oracle复制到oracle

---

谢谢您的帮助。

转换您的

删除。。。WHERE EXISTS（…）

使用多表删除语法的查询

SQLCommand := 'DELETE l' || 
    ' FROM HREPL_POLL, ' || LogTable ||
    ' l WHERE CHARTOROWID(l.ROWID) = p.Poll_ROWID '  ||
    ' AND p.Poll_PollID = :Pollid)';

在涉及的每个表上创建函数索引：

CREATE INDEX MYTABLE_CHARTOROWID ON MYTABLE(CHARTOROWID(ROWID));

然后再往下走：

DELETE e
FROM HREPL_POLL p, HREPL_Event e
WHERE CHARTOROWID(e.ROWID) = p.Poll_ROWID
  AND p.Poll_PollID = POLLID.CurrentPollID;

---

最后，完全删除dual上的

循环

——它完全不做任何事情；只需直接使用

CurrentPollid

执行其中的代码。

某些连接条件似乎不合理，使用此版本您可能会更幸运-如果您在生产环境中尝试，您将自行承担风险

-----------------------------------------------------------------------------------
--
--  Name:    PollEnd
--  Purpose: PollEnd request signifies that the change entries identified with the current
--           interval have been successfully entered into the store and forward database
--           and can be deleted from the article log tables.
--  Input:
--           argLSN         IN RAW(10)      LSN from distributor that was associated
--                                          with this poll interval
--  Output:
--  Notes:   This request causes those entries of the article log tables represented in the
--           Poll Table and having the current pollid to be deleted from both their article log
--           tables and from the Poll Table. The last request value is updated to reflect a
--           PollEnd request.
--
-----------------------------------------------------------------------------------
PROCEDURE PollEnd
(
    argLSN      IN RAW
)
AS
    SQLCommand      VARCHAR2(500);
    LogTable        VARCHAR2(255);
    CurrentPollID   NUMBER;
    TableIDs        number_tab;
    InstanceIDs     number_tab;
    IDCount         BINARY_INTEGER;
    PublisherLSN    RAW(10);

BEGIN
    -- Put the published tableIDs in a PL/SQL table of IDs
    HREPL.GetTableIDs(TableIDs, InstanceIDs);

    -- Get the current Poll ID
    SELECT Publisher_CurrentPollid INTO CurrentPollID FROM HREPL_Publisher;

    IDCount := TableIDs.COUNT;
    -- For each table represented in the ID list
    FOR id_ind IN 1 .. IDCount
    LOOP

        LogTable := REPLACE( REPLACE(ArticleLogTemplate, MatchString, TO_CHAR(TableIDs(id_ind))),
                                                         MatchStringY, TO_CHAR(InstanceIDs(id_ind)));

        BEGIN
            -- Generate command to delete from the article log those entries appearing in the
            -- Poll Table with the current PollID
            SQLCommand := 'DELETE FROM ' || LogTable || ' l ' ||
                              'WHERE l.ROWID IN (SELECT chartorowid(p.Poll_ROWID) FROM HREPL_POLL p ' ||
                              '              WHERE p.Poll_PollID = :Pollid)';

            HREPL.ExecuteCommandForPollID(SQLCommand, CurrentPollID);

        EXCEPTION
            WHEN OTHERS THEN NULL;
        END;
    END LOOP;

   -- Delete from HREPL_Event those entries appearing in the Poll Table
   -- with the current PollID.
   DELETE FROM HREPL_Event e
       WHERE ROWID in (SELECT chartorowid(p.Poll_ROWID) FROM HREPL_POLL p
                      WHERE p.Poll_PollID = CurrentPollID);

        -- Delete entries from the Poll Table having the current Pollid
    DELETE FROM HREPL_Poll
        WHERE Poll_PollID = CurrentPollID;

    -- Drop all views associated with articles that are marked as UnPublishPending.
    -- Note:  We cannot perform these drops in UnPublish table, since UnPublish
    --        table can execute concurrently with PollBegin and the querying
    --        of published tables by the log reader.  PollEnd, however, executes
    --        synchronously with respect to these activities, so can be used
    --        to cleanup log tables and views that are no longer needed.
    HREPL.CleanupLogsandViews;

    -- Mark the last request as PollEnd, and update the Publisher LSN
    -- to reflect the LSN committed at the publisher.
    UPDATE  HREPL_Publisher
    SET Publisher_PollInProcess = NoPollInProcess,
        Publisher_LSN = argLSN;

    -- Commit transaction
    COMMIT;

EXCEPTION
    WHEN OTHERS THEN
        ROLLBACK;
        RAISE;

END PollEnd;

---

像这样的问题很难仅通过一个过程来诊断。您是否知道您的

PollEnd

过程中增加的执行时间与哪个部分有关？那么，

IDCount

有多大？随着时间的推移，这个数字会急剧增加吗？另外（可能不相关），为什么要循环使用双表？该表不应该有多行。下游服务器上的数据需要是最新的吗？@MJH我上传了完整的数据包，我会向我们的dba询问您需要的参数。@Bohemian他们希望数据是“实时的”。我认为这不到15秒。这个问题应该继续问。如果你摆脱了无意义的循环，你必须删除循环中的

POLLID.

引用。无论如何，循环不太可能对整体性能产生明显的影响。@ammoQ我对代码的厌恶影响了我的rational方面。我修改了我的评论，直接使用

CurrentPollid

。干杯。你可能已经注意到我已经多次删除和取消删除了这个答案，但现在我相信它可能会起作用。。。当然，它首先应该在安全的环境中进行彻底的测试。