Update README.md - document reschedule_at

README.md

@@ -289,6 +289,19 @@ NewsletterJob = Struct.new(:text, :emails) do
 end
 ```
 
+On error, the job is scheduled again in 5 seconds + N ** 4, where N is the number of retries. This behavior can be overridden when you define `reschedule_at` method.
+
+```ruby
+NewsletterJob = Struct.new(:text, :emails) do
+  def perform
+    emails.each { |e| NewsletterMailer.deliver_text_to_email(text, e) }
+  end
+
+  def reschedule_at(current_time, attempts)
+    current_time + 5.seconds
+  end
+end
+```
 
 Hooks
 =====
@@ -345,7 +358,7 @@ create_table :delayed_jobs, :force => true do |table|
 end
 ```
 
-On failure, the job is scheduled again in 5 seconds + N ** 4, where N is the number of retries.
+On failure, unless `reschedule_at` is defined, the job is scheduled again in 5 seconds + N ** 4, where N is the number of retries. 
 
 The default `Worker.max_attempts` is 25. After this, the job either deleted (default), or left in the database with "failed_at" set.
 With the default of 25 attempts, the last retry will be 20 days later, with the last interval being almost 100 hours.