Hi Joe. For the background page process, you would have to submit the page and run a background page process, which is not what you want.

You could add the parameters to a table (and probably the session id), and launch an APEX Automation to run in the background (p_run_in_background = TRUE). The Automation would pick the parameters up from the table and run your code.

APEX_AUTOMATION.EXECUTE (
    p_application_id    IN NUMBER DEFAULT {current application id},
    p_static_id         IN VARCHAR2,
    p_run_in_background IN BOOLEAN )

If you then need to pickup the results you can do so using the session ID.

Otherwise, you could go with DBMS_SCHEDULER

BEGIN
   -- Create the job
   DBMS_SCHEDULER.create_job (
      job_name        => 'MY_SCHEDULER_JOB',
      job_type        => 'PLSQL_BLOCK',
      job_action      => 'BEGIN my_procedure(:param_value); END;',
      number_of_arguments => 1,
      start_date      => SYSTIMESTAMP,
      repeat_interval => NULL, -- Set if recurring; NULL for one-time execution
      enabled         => FALSE  -- Disable until arguments are set
   );

   -- Set the parameter for the job
   DBMS_SCHEDULER.set_job_argument_value (
      job_name   => 'MY_SCHEDULER_JOB',
      argument_position => 1, 
      argument_value    => 'Sample Parameter Value' -- This is the parameter you are passing
   );

   -- Enable the job (so it can run)
   DBMS_SCHEDULER.enable('MY_SCHEDULER_JOB');

   -- Optionally run the job immediately (without waiting for scheduled time)
   DBMS_SCHEDULER.run_job('MY_SCHEDULER_JOB');

END;