How can I load ASP.NET page in various parts?

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ASP.NET

C#4.0

Dear all,


I am working in a application where database contains 20,000,00 records in heavily used tables and user dashboard is designed to show various information from database using these tables.
For this purpose I used asp.net timer control with ajax update panel and AsyncPostBackTrigger to load page in 2 parts, but my problem is that it works only when debug="true" in web.config. Since debug="true" slows application performance down then it can't be set as true.
Can anybody help me to solve this issue in my application.


Thanks a lot.

What I have tried:

Design:

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <contenttemplate>
        </contenttemplate>
        <triggers>
            <asp:AsyncPostBackTrigger ControlID="ddl_District" EventName="SelectedIndexChanged" />
            <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
            <asp:AsyncPostBackTrigger ControlID="Timer2" EventName="Tick" />
        </triggers>
    
    <asp:Timer ID="Timer1" runat="server" OnTick="Timer1_Tick" Interval="500">
    
    <asp:Timer ID="Timer2" runat="server" OnTick="Timer2_Tick" Interval="1000" Enabled="false">

Code:

protected void Timer1_Tick(object sender, EventArgs e)
{
    Fetch_Function();
    Timer1.Enabled = false;
    Timer2.Enabled = true;
}

protected void Timer2_Tick(object sender, EventArgs e)
{
    FillCount();
    Timer1.Enabled = false;
    Timer2.Enabled = false;
    //Timer3.Enabled = true;
}