我有一个突然开始花费更长时间执行的方法（旧遗留代码）。唯一改变的是我已经从SQL Server 2008 R2 Expr升级到SQL Server 2014 Expr，因此开始使用SMO 2014。 我有大量的数据库，大约180个，我试图找到它们中的一些。贯穿它们的代码看起来像这样。
foreach (Database db in instance.Databases)
{
foreach (FileGroup fileGroup in db.FileGroups)
{
foreach (DataFile dataFile in fileGroup.Files)
{
}
}
}
当我找到数据库时，我正在寻找第二个foreach，需要花费更长的时间来执行，最坏的情况是长达一分钟。 第二个和第三个foreach之间没有代码执行。 第三个foreach中的代码，我可以像往常一样快速执行。
我无法弄清楚为什么这么长时间。我试图找出SQL Server 2014中的SMO是否有任何改变可能导致这种情况，但我没有运气。
如果有人能给我一些关于在哪里看的想法，我会很感激。
*更新*
根据SQL Profiler，这是SMO 2014提出的查询需要时间。使用SMO 2008 R2时不会进行此查询
exec sp_executesql N'SELECT
ISNULL((case dmi.mirroring_redo_queue_type when N''UNLIMITED'' then 0 else
dmi.mirroring_redo_queue end),0) AS [MirroringRedoQueueMaxSize],
ISNULL(dmi.mirroring_connection_timeout,0) AS [MirroringTimeout],
ISNULL(dmi.mirroring_partner_name,'''') AS [MirroringPartner],
ISNULL(dmi.mirroring_partner_instance,'''') AS [MirroringPartnerInstance],
ISNULL(dmi.mirroring_role,0) AS [MirroringRole],
ISNULL(dmi.mirroring_safety_level + 1, 0) AS [MirroringSafetyLevel],
ISNULL(dmi.mirroring_state + 1, 0) AS [MirroringStatus],
ISNULL(dmi.mirroring_witness_name,'''') AS [MirroringWitness],
ISNULL(dmi.mirroring_witness_state + 1, 0) AS [MirroringWitnessStatus],
CAST(case when dmi.mirroring_partner_name is null then 0 else 1 end AS bit)
AS [IsMirroringEnabled],
ISNULL(dmi.mirroring_guid,''00000000-0000-0000-0000-0000000000000000'') AS
[MirroringID],
ISNULL(dmi.mirroring_role_sequence,0) AS [MirroringRoleSequence],
ISNULL(dmi.mirroring_safety_sequence,0) AS [MirroringSafetySequence],
ISNULL(dmi.mirroring_failover_lsn,0) AS
[MirroringFailoverLogSequenceNumber],
dtb.is_ansi_null_default_on AS [AnsiNullDefault],
dtb.is_ansi_nulls_on AS [AnsiNullsEnabled],
dtb.is_ansi_padding_on AS [AnsiPaddingEnabled],
dtb.is_ansi_warnings_on AS [AnsiWarningsEnabled],
dtb.is_arithabort_on AS [ArithmeticAbortEnabled],
dtb.is_auto_shrink_on AS [AutoShrink],
dtb.is_cursor_close_on_commit_on AS [CloseCursorsOnCommitEnabled],
dtb.is_concat_null_yields_null_on AS [ConcatenateNullYieldsNull],
dtb.is_numeric_roundabort_on AS [NumericRoundAbortEnabled],
dtb.is_quoted_identifier_on AS [QuotedIdentifiersEnabled],
dtb.is_read_only AS [ReadOnly],
dtb.is_recursive_triggers_on AS [RecursiveTriggersEnabled],
dtb.is_local_cursor_default AS [LocalCursorsDefault],
dtb.page_verify_option AS [PageVerify],
dtb.recovery_model AS [RecoveryModel],
dtb.user_access AS [UserAccess],
dtb.is_db_chaining_on AS [DatabaseOwnershipChaining],
dtb.is_auto_update_stats_async_on AS [AutoUpdateStatisticsAsync],
dtb.is_date_correlation_on AS [DateCorrelationOptimization],
dtb.is_trustworthy_on AS [Trustworthy],
dtb.name AS [Name],
dtb.database_id AS [ID],
dtb.create_date AS [CreateDate],
dtb.is_auto_create_stats_on AS [AutoCreateStatisticsEnabled],
dtb.is_auto_update_stats_on AS [AutoUpdateStatisticsEnabled],
dtb.is_parameterization_forced AS [IsParameterizationForced],
dtb.is_read_committed_snapshot_on AS [IsReadCommittedSnapshotOn],
dtb.is_auto_close_on AS [AutoClose],
dtb.is_broker_enabled AS [BrokerEnabled],
CAST(isnull(dtb.source_database_id, 0) AS bit) AS [IsDatabaseSnapshot],
ISNULL(DB_NAME(dtb.source_database_id), N'''') AS
[DatabaseSnapshotBaseName],
dtb.is_fulltext_enabled AS [IsFullTextEnabled],
dtb.service_broker_guid AS [ServiceBrokerGuid],
dtb.snapshot_isolation_state AS [SnapshotIsolationState],
(dtb.is_published*1+dtb.is_subscribed*2+dtb.is_merge_published*4) AS
[ReplicationOptions],
ISNULL(suser_sname(dtb.owner_sid),'''') AS [Owner],
ISNULL(dtb.log_reuse_wait,0) AS [LogReuseWaitStatus],
drs.recovery_fork_guid AS [RecoveryForkGuid],
drs.database_guid AS [DatabaseGuid],
CAST((case when drs.last_log_backup_lsn is not null then 1 else 0 end) AS
bit) AS [HasFullBackup],
CAST(case when dtb.name in (''master'',''model'',''msdb'',''tempdb'') then 1
else dtb.is_distributor end AS bit) AS [IsSystemObject],
CAST(case when ctb.database_id is null then 0 else 1 end AS bit) AS
[ChangeTrackingEnabled],
CAST(ISNULL(ctb.is_auto_cleanup_on,0) AS bit) AS
[ChangeTrackingAutoCleanUp],
ISNULL(ctb.retention_period,0) AS [ChangeTrackingRetentionPeriod],
CAST(ISNULL(ctb.retention_period_units,0) AS tinyint) AS
[ChangeTrackingRetentionPeriodUnits],
dtb.containment AS [ContainmentType],
dtb.default_language_lcid AS [DefaultLanguageLcid],
dtb.default_language_name AS [DefaultLanguageName],
dtb.default_fulltext_language_lcid AS [DefaultFullTextLanguageLcid],
ISNULL(dtb.default_fulltext_language_name,N'''') AS
[DefaultFullTextLanguageName],
CAST(dtb.is_nested_triggers_on AS bit) AS [NestedTriggersEnabled],
CAST(dtb.is_transform_noise_words_on AS bit) AS [TransformNoiseWords],
dtb.two_digit_year_cutoff AS [TwoDigitYearCutoff],
dtb.target_recovery_time_in_seconds AS [TargetRecoveryTime],
dtb.delayed_durability AS [DelayedDurability],
dtb.is_auto_create_stats_incremental_on AS
[AutoCreateIncrementalStatisticsEnabled],
case
when dtb.collation_name is null then 0x200
else 0
end |
case
when 1 = dtb.is_in_standby then 0x40
else 0
end |
case dtb.state
when 1 then 0x2
when 2 then 0x8
when 3 then 0x4
when 4 then 0x10
when 5 then 0x100
when 6 then 0x20
else 1
end
AS [Status],
CAST(( case LOWER(convert( nvarchar(128), DATABASEPROPERTYEX(dtb.name,
''Updateability''))) when ''read_write'' then 1 else 0 end) AS bit) AS
[IsUpdateable],
CAST(dtb.is_encrypted AS bit) AS [EncryptionEnabled],
CAST(dtb.is_honor_broker_priority_on AS bit) AS [HonorBrokerPriority],
CAST(has_dbaccess(dtb.name) AS bit) AS [IsAccessible],
ISNULL(fsopt.directory_name , N'''') AS [FilestreamDirectoryName],
ISNULL(fsopt.non_transacted_access , 0) AS [FilestreamNonTransactedAccess],
dtb.name AS [DatabaseName2],
dtb.containment AS [ContainmentType2]
FROM
master.sys.databases AS dtb
LEFT OUTER JOIN sys.database_mirroring AS dmi ON dmi.database_id =
dtb.database_id
LEFT OUTER JOIN sys.database_recovery_status AS drs ON drs.database_id =
dtb.database_id
LEFT OUTER JOIN sys.change_tracking_databases AS ctb ON ctb.database_id =
dtb.database_id
LEFT OUTER JOIN sys.database_filestream_options AS fsopt ON
fsopt.database_id = dtb.database_id
WHERE
(dtb.name=@_msparam_0)',N'@_msparam_0 nvarchar(4000)',@_msparam_0=N'2016-11-
03'
此查询是否已添加到SMO 2014？ 有没有人知道为什么会这样运行？