Powershell empty large SharePoint 2013 lists

1. 
   
2. 
   
3. param($weburl,$listname)
4. if ($weburl -eq $null -or $listname -eq $null)
5. {
6.     write-host -foregroundcolor red "-weburl or -listname are null."
7.     return
8. }
10. Add-PSSnapin Microsoft.SharePoint.Powershell -EA 0
11. $web = get-spweb $weburl
12. $list = $web.lists[$listname]
14. $stringbuilder = new-object System.Text.StringBuilder
15.  
16. try
17. {
18.     $stringbuilder.Append("<?xml version=`"1.0`" encoding=`"UTF-8`"?><ows:Batch OnError=`"Return`">") > $null
20.     $i=0
22.     $spQuery = New-Object Microsoft.SharePoint.SPQuery
23.     $spQuery.ViewFieldsOnly = $true
25.     $items = $list.GetItems($spQuery);
26.     $count = $items.Count
28.     while ($i -le ($count-1))
29.     {
30.         write-host $i
31.         $item = $items[$i]
33.         $stringbuilder.AppendFormat("<Method ID=`"{0}`">", $i) > $null
34.         $stringbuilder.AppendFormat("<SetList Scope=`"Request`">{0}</SetList>", $list.ID) > $null
35.         $stringbuilder.AppendFormat("<SetVar Name=`"ID`">{0}</SetVar>", $item.Id) > $null
36.         $stringbuilder.Append("<SetVar Name=`"Cmd`">Delete</SetVar>") > $null
37.         $stringbuilder.Append("</Method>") > $null
39.         $i++
40.     }
41.     $stringbuilder.Append("</ows:Batch>") > $null
43.     $web.ProcessBatchData($stringbuilder.ToString()) > $null
44. }
45. catch
46. {
47.     Write-Host -ForegroundColor Red $_.Exception.ToString()
48. }
50. write-host -ForegroundColor Green "done."

Use

Delete-Items.ps1 -weburl [url of web] -listname [name of list]