I have a doc type and want to remove a property from it. I go to the backoffice and delete it and after 30 seconds or so I get the error below. I have 2-3k pieces of content that rely on this doc type.

Some config values that might be of interest:

<!-- Enable / disable xml content cache -->    
<XmlCacheEnabled>true</XmlCacheEnabled>

<!-- Update disk cache every time content has changed -->    
<ContinouslyUpdateXmlDiskCache>false</ContinouslyUpdateXmlDiskCache>

<!-- Update in-memory cache if xml file is changed -->    
<XmlContentCheckForDiskChanges>false</XmlContentCheckForDiskChanges>

Error details

The wait operation timed out

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.ComponentModel.Win32Exception: The wait operation timed out

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace: 


[Win32Exception (0x80004005): The wait operation timed out]

[SqlException (0x80131904): Timeout expired.  The timeout period elapsed prior to completion of the operation or the server is not responding.  This failure occurred while attempting to connect to the routing destination. The duration spent while attempting to connect to the original server was - [Pre-Login] initialization=26; handshake=2; [Login] initialization=0; authentication=0; [Post-Login] complete=1;  
The statement has been terminated.]
   System.Runtime.Remoting.Proxies.RealProxy.EndInvokeHelper(Message reqMsg, Boolean bProxyCase) +412
   System.Runtime.Remoting.Proxies.RemotingProxy.Invoke(Object NotUsed, MessageData& msgData) +11160232
   System.Action`1.EndInvoke(IAsyncResult result) +0
   umbraco.controls.ContentTypeControlNew.EndAsyncDeleteOperation(IAsyncResult ar) +242
   System.Web.UI.LegacyPageAsyncTask.CompleteTask(Boolean timedOut, Boolean syncTimeoutCaller) +263

[HttpException (0x80004005): Exception of type 'System.Web.HttpException' was thrown.]
   System.Web.UI.Page.ExecuteRegisteredAsyncTasks() +9666173
   umbraco.controls.ContentTypeControlNew.gpw_Delete(Object sender, EventArgs e) +280
   umbraco.controls.GenericProperties.GenericPropertyWrapper.GenericPropertyWrapper_Delete(Object sender, EventArgs e) +28
   System.EventHandler.Invoke(Object sender, EventArgs e) +0
   umbraco.controls.GenericProperties.GenericProperty.DeleteButton2_Click(Object sender, EventArgs e) +28
   System.Web.UI.WebControls.LinkButton.OnClick(EventArgs e) +116
   System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument) +101
   System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +9664274
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1724

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.36283