spDeleteUpdate 存储过程运行缓慢

spDeleteUpdate当存储过程运行时，可能需要数十秒才能删除单个更新。 在 Windows Server 更新服务（WSUS）维护期间用于 spDeleteUpdate 删除数百或数千个更新时，可能需要几天时间才能完成。

原因

性能缓慢，因为主键未在由创建的 spDeleteUpdate临时表上设置。

解决方法

若要解决此问题，请在每个受影响的 WSUS 服务器上针对 WSUS 数据库（SUSDB）运行以下 SQL 脚本。 此脚本在 @revisionList 临时表上设置主键。

USE [SUSDB]
GO

/****** Object:  StoredProcedure [dbo].[spDeleteUpdate]    Script Date: 11/2/2020 8:55:02 AM ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

 
ALTER PROCEDURE [dbo].[spDeleteUpdate]
    @localUpdateID int
AS
SET NOCOUNT ON
BEGIN TRANSACTION
SAVE TRANSACTION DeleteUpdate
DECLARE @retcode INT
DECLARE @revisionID INT
DECLARE @revisionList TABLE(RevisionID INT PRIMARY KEY)
INSERT INTO @revisionList (RevisionID)
    SELECT r.RevisionID FROM dbo.tbRevision r
        WHERE r.LocalUpdateID = @localUpdateID
IF EXISTS (SELECT b.RevisionID FROM dbo.tbBundleDependency b WHERE b.BundledRevisionID IN (SELECT RevisionID FROM @revisionList))
   OR EXISTS (SELECT p.RevisionID FROM dbo.tbPrerequisiteDependency p WHERE p.PrerequisiteRevisionID IN (SELECT RevisionID FROM @revisionList))
BEGIN
    RAISERROR('spDeleteUpdate got error: cannot delete update as it is still referenced by other update(s)', 16, -1)
    ROLLBACK TRANSACTION DeleteUpdate
    COMMIT TRANSACTION
    RETURN(1)
END
INSERT INTO @revisionList (RevisionID)
    SELECT DISTINCT b.BundledRevisionID FROM dbo.tbBundleDependency b
        INNER JOIN dbo.tbRevision r ON r.RevisionID = b.RevisionID
        INNER JOIN dbo.tbProperty p ON p.RevisionID = b.BundledRevisionID
        WHERE r.LocalUpdateID = @localUpdateID
            AND p.ExplicitlyDeployable = 0
IF EXISTS (SELECT IsLocallyPublished FROM dbo.tbUpdate WHERE LocalUpdateID = @localUpdateID AND IsLocallyPublished = 1)
BEGIN
    INSERT INTO @revisionList (RevisionID)
        SELECT DISTINCT pd.PrerequisiteRevisionID FROM dbo.tbPrerequisiteDependency pd
            INNER JOIN dbo.tbUpdate u ON pd.PrerequisiteLocalUpdateID = u.LocalUpdateID
            INNER JOIN dbo.tbProperty p ON pd.PrerequisiteRevisionID = p.RevisionID
            WHERE u.IsLocallyPublished = 1 AND p.UpdateType = 'Category'
END
DECLARE #cur CURSOR LOCAL FAST_FORWARD FOR
    SELECT t.RevisionID FROM @revisionList t ORDER BY t.RevisionID DESC
OPEN #cur
FETCH #cur INTO @revisionID
WHILE (@@ERROR=0 AND @@FETCH_STATUS=0)
BEGIN
    IF EXISTS (SELECT b.RevisionID FROM dbo.tbBundleDependency b WHERE b.BundledRevisionID = @revisionID
                   AND b.RevisionID NOT IN (SELECT RevisionID FROM @revisionList))
       OR EXISTS (SELECT p.RevisionID FROM dbo.tbPrerequisiteDependency p WHERE p.PrerequisiteRevisionID = @revisionID
                      AND p.RevisionID NOT IN (SELECT RevisionID FROM @revisionList))
    BEGIN
        DELETE FROM @revisionList WHERE RevisionID = @revisionID
        IF (@@ERROR <> 0)
        BEGIN
            RAISERROR('Deleting disqualified revision from temp table failed', 16, -1)
            GOTO Error
        END
    END
    FETCH NEXT FROM #cur INTO @revisionID
END
IF (@@ERROR <> 0)
BEGIN
    RAISERROR('Fetching a cursor to value a revision', 16, -1)
    GOTO Error
END
CLOSE #cur
DEALLOCATE #cur
DECLARE #cur CURSOR LOCAL FAST_FORWARD FOR
    SELECT t.RevisionID FROM @revisionList t ORDER BY t.RevisionID DESC
OPEN #cur
FETCH #cur INTO @revisionID
WHILE (@@ERROR=0 AND @@FETCH_STATUS=0)
BEGIN
    EXEC @retcode = dbo.spDeleteRevision @revisionID
    IF @@ERROR <> 0 OR @retcode <> 0
    BEGIN
        RAISERROR('spDeleteUpdate got error from spDeleteRevision', 16, -1)
        GOTO Error
    END
    FETCH NEXT FROM #cur INTO @revisionID
END
IF (@@ERROR <> 0)
BEGIN
    RAISERROR('Fetching a cursor to delete a revision', 16, -1)
    GOTO Error
END
CLOSE #cur
DEALLOCATE #cur
COMMIT TRANSACTION
RETURN(0)
Error:
    CLOSE #cur
    DEALLOCATE #cur
    IF (@@TRANCOUNT > 0)
    BEGIN
        ROLLBACK TRANSACTION DeleteUpdate
        COMMIT TRANSACTION
    END
    RETURN(1)
GO