cmhealth

0.0.2.14

tests/Test-SqlIndexFragmentation.ps1

function Test-SqlIndexFragmentation {
    [CmdletBinding()]
    param (
        [parameter()][string] $TestName = "Test-SqlIndexFragmentation",
        [parameter()][string] $TestGroup = "database",
        [parameter()][string] $Description = "Validate SQL database index fragmentation status",
        [parameter()][hashtable] $ScriptParams
    )
    try {
        [int]$MinValue = Get-CmHealthDefaultValue -KeySet "sqlserver:IndexFragThresholdPercent" -DataSet $CmHealthConfig
        [System.Collections.Generic.List[PSObject]]$tempdata = @() # for detailed test output to return if needed
        $stat = "PASS"
        $msg = "No indexes were fragmented more than $MinValue percent"
        $query = "SELECT dbschemas.[name] as 'Schema',
dbtables.[name] as 'Table',
dbindexes.[name] as 'Index',
indexstats.avg_fragmentation_in_percent,
indexstats.page_count
FROM sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL, NULL, NULL) AS indexstats
INNER JOIN sys.tables dbtables on dbtables.[object_id] = indexstats.[object_id]
INNER JOIN sys.schemas dbschemas on dbtables.[schema_id] = dbschemas.[schema_id]
INNER JOIN sys.indexes AS dbindexes ON dbindexes.[object_id] = indexstats.[object_id]
AND indexstats.index_id = dbindexes.index_id
WHERE indexstats.database_id = DB_ID() and indexstats.avg_fragmentation_in_percent > $($MinValue)
ORDER BY indexstats.avg_fragmentation_in_percent desc"
        if ($ScriptParams.Credential) {
            $res = (Invoke-DbaQuery -SqlInstance $ScriptParams.SqlInstance -Database $ScriptParams.Database -Query $query -SqlCredential $ScriptParams.Credential)
        } else {
            $res = (Invoke-DbaQuery -SqlInstance $ScriptParams.SqlInstance -Database $ScriptParams.Database -Query $query)
        }
        $res = $res | ForEach-Object {
                [pscustomobject]@{
                    Schema = $_.Schema
                    Table  = $_.Table 
                    Index  = $_.Index
                    AvgFragPct = [math]::Round($_.avg_fragmentation_in_percent,2)
                    PageCount  = $_.PageCount
                }
        }
        if ($res.Count -gt 1) { 
            $stat = 'WARNING' 
            $msg = "$($res.Count) indexes were fragmented more than $MinValue percent"
            $res | Foreach-Object {$tempdata.Add("Table=$($_.Table),Index=$($_.Index),FragPct=$($_.AvgFragPct)") }
        }
    }
    catch {
        $stat = 'ERROR'
        $msg = $_.Exception.Message -join ';'
    }
    finally {
        Write-Output $([pscustomobject]@{
            TestName    = $TestName
            TestGroup   = $TestGroup
            TestData    = $tempdata
            Description = $Description
            Status      = $stat 
            Message     = $msg
            Credential  = $(if($ScriptParams.Credential){$($ScriptParams.Credential).UserName} else { $env:USERNAME })
        })
    }
}