Index: openacs-4/packages/xotcl-core/tcl/01-debug-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xotcl-core/tcl/01-debug-procs.tcl,v
diff -u -N -r1.93.2.23 -r1.93.2.24
--- openacs-4/packages/xotcl-core/tcl/01-debug-procs.tcl	22 Jul 2020 11:31:25 -0000	1.93.2.23
+++ openacs-4/packages/xotcl-core/tcl/01-debug-procs.tcl	23 Jul 2020 12:24:03 -0000	1.93.2.24
@@ -450,11 +450,21 @@
       ns_log Error "ns_ictl trace returned: $errorMsg"
     }
   }
-  # ns_ictl trace idle {
-  #   ns_log notice =====IDLE=====START    
-  #   ::xo::broadcast receive
-  #   ns_log notice =====IDLE=====END
-  # }
+
+  if {![::acs::icanuse "ns_ictl trace idle"]} {
+    #
+    # In case the server has way to many connection threads defined,
+    # broadcast messages might pile up. In these situations, the idle
+    # callback provides a means to keep these idle connection threads
+    # uptodate.
+    #
+    ns_ictl trace idle {
+      ns_log notice =====IDLE=====START
+      ::xo::broadcast receive
+      ns_log notice =====IDLE=====END
+    }
+  }
+
   #
   # Register::xo::at_delete function only once
   #