Hi!

Suddenly the tree in the backend (mostly the content tree) remains empty and after looking in the log I saw that it is timing out:

At /umbraco/tree.aspx?rnd=b2d06b97-5204-4c56-9a46-7b65b5268fb4&id=-1&treeType=content&contextMenu=true&isDialog=false (Referred by: http://www.bktravelsolutions.se/umbraco/TreeInit.aspx?app=content): umbraco.DataLayer.SqlHelperException: Umbraco Exception (DataLayer): SQL helper exception in ExecuteReader ---> MySql.Data.MySqlClient.MySqlException: Timeout expired.  The timeout period elapsed prior to completion of the operation or the server is not responding.
   at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior)
   at MySql.Data.MySqlClient.MySqlHelper.ExecuteReader(MySqlConnection connection, MySqlTransaction transaction, String commandText, MySqlParameter[] commandParameters, Boolean ExternalConn)
   at MySql.Data.MySqlClient.MySqlHelper.ExecuteReader(String connectionString, String commandText, MySqlParameter[] commandParameters)
   at umbraco.DataLayer.SqlHelpers.MySql.MySqlHelper.ExecuteReader(String commandText, MySqlParameter[] parameters)
   at umbraco.DataLayer.SqlHelper`1.ExecuteReader(String commandText, IParameter[] parameters)
   --- End of inner exception stack trace ---
   at umbraco.DataLayer.SqlHelper`1.ExecuteReader(String commandText, IParameter[] parameters)
   at umbraco.cms.businesslogic.web.Document.GetChildrenForTree(Int32 NodeId)
   at umbraco.cms.presentation.Trees.BaseContentTree.Render(XmlTree& Tree)
   at umbraco.loadContent.Render(XmlTree& Tree)
   at umbraco.cms.presentation.tree.LoadTree(String treeAlias)
   at umbraco.cms.presentation.tree.Page_Load(Object sender, EventArgs e)
   at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e)
   at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e)
   at System.Web.UI.Control.OnLoad(EventArgs e)
   at umbraco.BasePages.BasePage.OnLoad(EventArgs e)
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

 Im using a shared host and My SQL. Is it absolutely clear that it is a problem of the DB or could it be something else?