title: Oracle APEX framework is too slow responding to pages requests
body: <p>Edited: Any page takes long time to open, starting from the sign in page along with app builder, any custom app, object browser, sql commands, etc... .
  I am using <code>APEX 20.1, ords-20.2.0.178.1804, DB 18c XE , windows 7 64bits, Google chrome Version 84.0.4147.125 (Official Build) (64-bit) and opera Version:70.0.3728.106.</code>
  The problem occurred too when I used <code>12c release 1 enterprise edition with apex 18.2 and ords 18.4.</code>
  Here is a video to show you what I mean and the details follow,
  <a href="https://www.youtube.com/watch?v=7fz31jimCuA" rel="nofollow noreferrer">https://www.youtube.com/watch?v=7fz31jimCuA</a>
  When I am using it, Task Manager shows that I have about 700 Free memory space.
  Here is a system summary</p>
  <pre><code>OS Name Microsoft Windows 7 Ultimate  
  Version 6.1.7601 Service Pack 1 Build 7601  
  Other OS Description Not Available  
  OS Manufacturer Microsoft Corporation  
  System Name A-PC  
  System Manufacturer Dell Inc.  
  System Model Latitude E6410  
  System Type x64-based PC  
  Processor Intel(R) Core(TM) i5 CPU       M 560  @ 2.67GHz, 2667 Mhz, 2 Core(s), 4 Logical Processor(s)  
  BIOS Version/Date Dell Inc. A17, 12/05/2017  
  SMBIOS Version 2.6  
  Windows Directory C:\Windows  
  System Directory C:\Windows\system32  
  Boot Device \Device\HarddiskVolume1  
  Locale Egypt  
  Hardware Abstraction Layer Version = &quot;6.1.7601.17514&quot;  
  User Name a-PC\a  
  Time Zone Egypt Standard Time  
  Installed Physical Memory (RAM) 4.00 GB  
  Total Physical Memory 3.80 GB  
  Available Physical Memory 1.87 GB  
  Total Virtual Memory 7.60 GB  
  Available Virtual Memory 5.29 GB  
  Page File Space 3.80 GB  
  Page File D:\pagefile.sys  
  </code></pre>
  <p>The database has one pluggable database(the default one).
  Automatic Memory Management is enabled with MEMORY_TARGET set to 1100, SGA_TARGET and PGA_AGGREGATE_TARGET set to 0.</p>
  <p>The only thing I can notice in Task Manager&gt; Performance Tab&gt; Resource Monitor window is that there are number of hard faults/sec associated with processes <code>oracle.exe</code>, <code>searchindexer.exe</code> and one <code>chrome.exe</code> process. But the maximum number I've seen was 13 and rarely displayed. The majority were 1,2,3, etc... . And they're not always seen. I do not think it could cause this bad performance.
  What could be the cause? How do I investigate it?</p>