slow_delete

 #Method to slowly delete items from a db giving sleep time between deletions to prevent longer term locking
 def slow_delete(num1, num2=nil, options={})
   step = options[:step] || 5000
   sleeptime = options[:sleep] || 2
   klazz = options[:class] || Log
   
   if num2.nil?
     num2 = num1
     num1 = 0
   end

   m = num1+step
   t = 0
   while m < num2
     t += klazz.delete_all("id < #{m} and id >= #{m-step}")
     m += step
     print "."
	 sleep sleeptime
   end

   t += klazz.delete_all("id < #{num2} and id >= #{m}")

   t
 end