# File lib/memcache_util.rb, line 45
    def self.delete(key, delay = nil)
        start_time = Time.now.to_f
        CACHE.delete key, delay
        end_time = Time.now.to_f
        ActiveRecord::Base.logger.debug(
            sprintf("MemCache Delete (%0.6f)  %s",
                    end_time - start_time, key))
    rescue MemCache::MemCacheError => err
        # Ignore delete failure.
        ActiveRecord::Base.logger.debug("MemCache Error: #{err.message}")
    end