统计Wait_Queue

function funhelp()
{
$helpText=@"
NAME:Collect_dm_os_wait_stats.ps1
This script Collect Wait and Queue information from DMV sys.dm_os_wait_stats
This is a hardcode script , you don't need to specify any parameter. Please modify 'computerList' if you want to add more computers..
Make sure you have a Disk_database in the host where this script runs. And the two tables dm_os_wait_stats_xxx exist in the database.
SYNTAX:
Collect_dm_os_wait_stats.ps1
"@
Write-Host $helpText -ForegroundColor Green

}


function GetData([string]$servername,$tableName,$orderbyColumn)
{
#get statistics from target instance
 $sqlStatement = @"
select top 20
       @@SERVERNAME
      ,[wait_type]
      ,[waiting_tasks_count]
      ,[wait_time_ms]
      ,[max_wait_time_ms]
      ,[signal_wait_time_ms]
from sys.dm_os_wait_stats
order by $orderbyColumn;
"@
$sqlStatement
#DBCC SQLPERF ('sys.dm_os_wait_stats', CLEAR);

    $SqlConnection = New-Object System.Data.SqlClient.SqlConnection 
    $SqlConnection.ConnectionString = "Server=$servername;Initial Catalog=master;Trusted_Connection=True;"
    $SqlCmd =New-Object System.Data.SqlClient.SqlCommand
    $SqlCmd.Connection=$SqlConnection
    $SqlCmd.CommandText=$sqlStatement
    $da= New-Object System.Data.SqlClient.SqlDataAdapter
    $da.SelectCommand=$SqlCmd
    $ds=New-Object system.Data.DataSet
    $da.Fill($ds)


    #purge into database
    SaveToDisk $ds.Tables[0] $tableName
    
}

function CleanWaitStats([string]$servername)
{
 $sqlStatement = @"
DBCC SQLPERF ('sys.dm_os_wait_stats', CLEAR)
"@

    $SqlConnection = New-Object System.Data.SqlClient.SqlConnection 
    $SqlConnection.ConnectionString = "Server=$servername;Initial Catalog=master;Integrated Security=SSPI;"
    $SqlCmd =New-Object System.Data.SqlClient.SqlCommand 
    $SqlCmd.Connection=$SqlConnection
    $SqlCmd.CommandText=$sqlStatement

                
    $SqlConnection.Open()
    $effectCount=$SqlCmd.ExecuteNonQuery()
    $SqlConnection.Close()
    
}


function SaveToDisk($table,$tableName)
{
    $SqlConnection = New-Object System.Data.SqlClient.SqlConnection 
    $SqlConnection.ConnectionString = "Server=.;Initial Catalog=disk_database;Trusted_Connection=True;"
    
    
    $sbc = New-Object System.Data.SqlClient.SqlBulkCopy($SqlConnection)
    $SqlConnection.Open()
    $sbc.DestinationTableName = $tableName
    
    $sbc.WriteToServer($table)
    "done"    
}



funhelp

$computerList="db-back-read-05","db-back-read-06"

foreach($computer in $computerList)
{
    Write-Host "Collect data against $computer..."
    GetData $computer "dm_os_wait_stats_waittime" "wait_time_ms desc"
    GetData $computer "dm_os_wait_stats_taskcounter" "waiting_tasks_count desc"
    
    #clear
    CleanWaitStats $computer
}

#defination of dm_os_wait_stats_xxxx
#CREATE TABLE [dbo].[dm_os_wait_stats_xxx](
#    [serverName] [nvarchar](50) ,
#    [wait_type] [nvarchar](60) NOT NULL,
#    [waiting_tasks_count] [bigint] NOT NULL,
#    [wait_time_ms] [bigint] NOT NULL,
#    [max_wait_time_ms] [bigint] NOT NULL,
#    [signal_wait_time_ms] [bigint] NOT NULL,
#    [createDate] datetime  not null default getdate(),
#    primary key (servername,wait_type,createDate)
#) ON [PRIMARY]