Invoke-WsusSUSDBOptimization.ps1

<#
.DESCRIPTION
    Microsoft recommended database maintenance script
 
    "The performance of large Windows Server Update Services (WSUS) deployments will degrade over time if the WSUS database
    is not maintained properly. The WSUSDBMaintenance script is a T-SQL script that can be run by SQL Server administrators
    to re-index and defragment WSUS databases. It should not be used on WSUS 2.0 databases.This script contributed by the
    Microsoft WSUS team."
 
    Reference: https://support.microsoft.com/en-us/help/4490644/complete-guide-to-microsoft-wsus-and-configuration-manager-sup-maint
#>
#Requires -Modules SqlServer
 
function Invoke-WsusSUSDBOptimization {
    [CmdletBinding()]
    Param()
    Begin
    {
        $location = Get-Location;
 
        # SQL script for SUSDB database optimization
        $sqlQuery = @'
/******************************************************************************
This sample T-SQL script performs basic maintenance tasks on SUSDB
1. Identifies indexes that are fragmented and defragments them. For certain
   tables, a fill-factor is set in order to improve insert performance.
   Based on MSDN sample at http://msdn2.microsoft.com/en-us/library/ms188917.aspx
   and tailored for SUSDB requirements
2. Updates potentially out-of-date table statistics.
******************************************************************************/
 
USE SUSDB;
GO
SET NOCOUNT ON;
 
-- Rebuild or reorganize indexes based on their fragmentation levels
DECLARE @work_to_do TABLE (
    objectid int
    , indexid int
    , pagedensity float
    , fragmentation float
    , numrows int
)
 
DECLARE @objectid int;
DECLARE @indexid int;
DECLARE @schemaname nvarchar(130);
DECLARE @objectname nvarchar(130);
DECLARE @indexname nvarchar(130);
DECLARE @numrows int
DECLARE @density float;
DECLARE @fragmentation float;
DECLARE @command nvarchar(4000);
DECLARE @fillfactorset bit
DECLARE @numpages int
 
-- Select indexes that need to be defragmented based on the following
-- * Page density is low
-- * External fragmentation is high in relation to index size
PRINT 'Estimating fragmentation: Begin. ' + convert(nvarchar, getdate(), 121)
INSERT @work_to_do
SELECT
    f.object_id
    , index_id
    , avg_page_space_used_in_percent
    , avg_fragmentation_in_percent
    , record_count
FROM
    sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL , NULL, 'SAMPLED') AS f
WHERE
    (f.avg_page_space_used_in_percent < 85.0 and f.avg_page_space_used_in_percent/100.0 * page_count < page_count - 1)
    or (f.page_count > 50 and f.avg_fragmentation_in_percent > 15.0)
    or (f.page_count > 10 and f.avg_fragmentation_in_percent > 80.0)
 
PRINT 'Number of indexes to rebuild: ' + cast(@@ROWCOUNT as nvarchar(20))
 
PRINT 'Estimating fragmentation: End. ' + convert(nvarchar, getdate(), 121)
 
SELECT @numpages = sum(ps.used_page_count)
FROM
    @work_to_do AS fi
    INNER JOIN sys.indexes AS i ON fi.objectid = i.object_id and fi.indexid = i.index_id
    INNER JOIN sys.dm_db_partition_stats AS ps on i.object_id = ps.object_id and i.index_id = ps.index_id
 
-- Declare the cursor for the list of indexes to be processed.
DECLARE curIndexes CURSOR FOR SELECT * FROM @work_to_do
 
-- Open the cursor.
OPEN curIndexes
 
-- Loop through the indexes
WHILE (1=1)
BEGIN
    FETCH NEXT FROM curIndexes
    INTO @objectid, @indexid, @density, @fragmentation, @numrows;
    IF @@FETCH_STATUS < 0 BREAK;
 
    SELECT
        @objectname = QUOTENAME(o.name)
        , @schemaname = QUOTENAME(s.name)
    FROM
        sys.objects AS o
        INNER JOIN sys.schemas as s ON s.schema_id = o.schema_id
    WHERE
        o.object_id = @objectid;
 
    SELECT
        @indexname = QUOTENAME(name)
        , @fillfactorset = CASE fill_factor WHEN 0 THEN 0 ELSE 1 END
    FROM
        sys.indexes
    WHERE
        object_id = @objectid AND index_id = @indexid;
 
    IF ((@density BETWEEN 75.0 AND 85.0) AND @fillfactorset = 1) OR (@fragmentation < 30.0)
        SET @command = N'ALTER INDEX ' + @indexname + N' ON ' + @schemaname + N'.' + @objectname + N' REORGANIZE';
    ELSE IF @numrows >= 5000 AND @fillfactorset = 0
        SET @command = N'ALTER INDEX ' + @indexname + N' ON ' + @schemaname + N'.' + @objectname + N' REBUILD WITH (FILLFACTOR = 90)';
    ELSE
        SET @command = N'ALTER INDEX ' + @indexname + N' ON ' + @schemaname + N'.' + @objectname + N' REBUILD';
    PRINT convert(nvarchar, getdate(), 121) + N' Executing: ' + @command;
    EXEC (@command);
    PRINT convert(nvarchar, getdate(), 121) + N' Done.';
END
 
-- Close and deallocate the cursor.
CLOSE curIndexes;
DEALLOCATE curIndexes;
 
 
IF EXISTS (SELECT * FROM @work_to_do)
BEGIN
    PRINT 'Estimated number of pages in fragmented indexes: ' + cast(@numpages as nvarchar(20))
    SELECT @numpages = @numpages - sum(ps.used_page_count)
    FROM
        @work_to_do AS fi
        INNER JOIN sys.indexes AS i ON fi.objectid = i.object_id and fi.indexid = i.index_id
        INNER JOIN sys.dm_db_partition_stats AS ps on i.object_id = ps.object_id and i.index_id = ps.index_id
 
    PRINT 'Estimated number of pages freed: ' + cast(@numpages as nvarchar(20))
END
GO
 
 
--Update all statistics
PRINT 'Updating all statistics.' + convert(nvarchar, getdate(), 121)
EXEC sp_updatestats
PRINT 'Done updating statistics.' + convert(nvarchar, getdate(), 121)
GO
'@;
        ### WSUS WID (Windows Internal Database) optimieren
        # Set the named pipe to be used based on WSUS database type (SQL or WID)
        $wsusSqlServerName = (Get-ItemProperty "HKLM:\Software\Microsoft\Update Services\Server\Setup" -Name "SqlServername").SqlServername
        $serverInstance = 'np:\\.\pipe\MSSQL$SQLEXPRESS\sql\query'
        If ($wsusSqlServerName -match '##WID') {
            $serverInstance = 'np:\\.\pipe\MICROSOFT##WID\tsql\query'
        }
        If ($wsusSqlServerName -match '##SSEE') {
            $serverInstance = 'np:\\.\pipe\MSSQL$MICROSOFT##SSEE\sql\query'
        }
    }
    Process {
        Invoke-Sqlcmd -ServerInstance $serverInstance -Query $sqlQuery
    }
    End {
        Set-Location $location
    }
};
 
Invoke-WsusSUSDBOptimization