Cache with a Gridview

Ok..please explain,,,
I have a gidview on a aspx (with a master pag). That is basically a blog, so the grid view can show 100 items or 1.
I have cached like this..at the top

<%@ OutputCache Duration="60" VaryByParam="jh65;su23" %>
And I have cached the SQL Datasource for the Gridview like this
<asp:SqlDataSource
 ID="SqlData1"
 runat="server"
 ConnectionString="<%$ ConnectionStrings:RTT_OPS_con %>"
 SelectCommandType="StoredProcedure"
 DataSourceMode ="DataSet"
 SelectCommand="procGetBlogNodesGroups"
 EnableCaching="true"
 CacheDuration="15">
<SelectParameters>
<asp:QueryStringParameter QueryStringField="jh65"  Name="cBlogID" DefaultValue="ODA ...