We recently upgraded many of our instances to 2016. As a result, a SELECT statement from sqlpackage.exe is timing out on some instances.
After some testing, I found that by updating the statistics on the database's system tables showing up in the execution plan, the SELECT stopped timing out.
update statistics sys.[sysclsobjs] with fullscan
update statistics sys.[syscolpars] with fullscan
update statistics sys.[sysidxstats] with fullscan
update statistics sys.[sysiscols] with fullscan
update statistics sys.[sysobjvalues] with fullscan
Is there anyway either through the standard maintenance packages, Ola Hallengren's scripts or some other process to only update system table statistics?
Update 08/01
Here are the steps I took after upgrade
About the 4199 traceflag KB974006
-- for the instance
/*
Turn on traceflag 4199 (my understanding of this traceflag is that it disables
optimizer hotfixes in 2016
*/
-- disable automatic numa
sp_configure 'automatic soft-NUMA disabled', 1
GO
-- For each database
-- Turn on Query optimizer hotfixes
-- Turn off Legacy cardinality estimation
exec sp_MSforeachDB 'ALTER DATABASE [?] SET COMPATIBILITY_LEVEL = 130;
USE [?];
ALTER DATABASE SCOPED CONFIGURATION SET QUERY_OPTIMIZER_HOTFIXES = ON;
ALTER DATABASE SCOPED CONFIGURATION SET LEGACY_CARDINALITY_ESTIMATION = OFF;
-- update statistics for all tables, system tables are ignored
EXEC sp_MSforeachtable ''UPDATE STATISTICS [?] WITH FULLSCAN''
'
Update 08/02
Here is the SELECT from sqlpackage.exe causing timeouts for TFS
SELECT * FROM (
SELECT
SCHEMA_NAME([o].[schema_id]) AS [SchemaName],
[si].[object_id] AS [ColumnSourceId],
[o].[name] AS [ColumnSourceName],
[o].[type] AS [ColumnSourceType],
[ic].[column_id] AS [ColumnId],
[c].[name] AS [ColumnName],
[si].[index_id] AS [IndexId],
[si].[name] AS [IndexName],
[ds].[type] AS [DataspaceType],
[ds].[data_space_id] AS [DataspaceId],
[ds].[name] AS [DataspaceName],
[si].[fill_factor] AS [FillFactor],
[si].[is_padded] AS [IsPadded],
[si].[is_disabled] AS [IsDisabled],
[si].[allow_page_locks] AS [DoAllowPageLocks],
[si].[allow_row_locks] AS [DoAllowRowLocks],
[sit].[cells_per_object] AS [CellsPerObject],
[sit].[bounding_box_xmin] AS [XMin],
[sit].[bounding_box_xmax] AS [XMax],
[sit].[bounding_box_ymin] AS [YMin],
[sit].[bounding_box_ymax] AS [YMax],
[sit].[level_1_grid] AS [Level1Grid],
[sit].[level_2_grid] AS [Level2Grid],
[sit].[level_3_grid] AS [Level3Grid],
[sit].[level_4_grid] AS [Level4Grid],
[sit].[tessellation_scheme] AS [TessellationScheme],
[s].[no_recompute] AS [NoRecomputeStatistics],
[p].[data_compression] AS [DataCompressionId],
CONVERT(bit, CASE WHEN [ti].[data_space_id] = [ds].[data_space_id] THEN 1 ELSE 0 END)
AS [EqualsParentDataSpace]
FROM
[sys].[spatial_indexes] AS [si] WITH (NOLOCK)
INNER JOIN [sys].[objects] AS [o] WITH (NOLOCK) ON [si].[object_id] = [o].[object_id]
INNER JOIN [sys].[spatial_index_tessellations] [sit] WITH (NOLOCK) ON [si].[object_id] = [sit].[object_id] AND [si].[index_id] = [sit].[index_id]
INNER JOIN [sys].[data_spaces] AS [ds] WITH (NOLOCK) ON [ds].[data_space_id] = [si].[data_space_id]
INNER JOIN [sys].[index_columns] AS [ic] WITH (NOLOCK) ON [si].[object_id] = [ic].[object_id] AND [si].[index_id] = [ic].[index_id]
INNER JOIN [sys].[columns] AS [c] WITH (NOLOCK) ON [si].[object_id] = [c].[object_id] AND [ic].[column_id] = [c].[column_id]
INNER JOIN [sys].[objects] AS [o2] WITH (NOLOCK) ON [o2].[parent_object_id] = [si].[object_id]
INNER JOIN [sys].[stats] AS [s] WITH (NOLOCK) ON [o2].[object_id] = [s].[object_id] AND [s].[name] = [si].[name]
INNER JOIN [sys].[partitions] AS [p] WITH (NOLOCK) ON [p].[object_id] = [o2].[object_id] AND [p].[partition_number] = 1
LEFT JOIN [sys].[indexes] AS [ti] WITH (NOLOCK) ON [o].[object_id] = [ti].[object_id]
LEFT JOIN [sys].[tables] AS [t] WITH (NOLOCK) ON [t].[object_id] = [si].[object_id]
WHERE [si].[is_hypothetical] = 0
AND [ti].[index_id] < 2
AND OBJECTPROPERTY([o].[object_id], N'IsSystemTable') = 0
AND ([t].[is_filetable] = 0 OR [t].[is_filetable] IS NULL)
AND ([o].[is_ms_shipped] = 0 AND NOT EXISTS (SELECT *
FROM [sys].[extended_properties]
WHERE [major_id] = [o].[object_id]
AND [minor_id] = 0
AND [class] = 1
AND [name] = N'microsoft_database_tools_support'
))
) AS [_results]
If I don't update system table statistics for the database, then this SELECT can and will timeout when deploying via sqlpackage.exe
