diff --git a/lib/tasks/statistic_subject_info.rake b/lib/tasks/statistic_subject_info.rake
index 330ebf629..402be454b 100644
--- a/lib/tasks/statistic_subject_info.rake
+++ b/lib/tasks/statistic_subject_info.rake
@@ -48,7 +48,7 @@ namespace :subjects do
     end
     subjects.find_in_batches(batch_size: 50) do |s|
       str = []
-      Parallel.each(s, in_processes: 4) do |subject|
+      Parallel.each(s, in_threads: 4) do |subject|
         puts("---------------------course_info_statistic: #{subject.id}")
         Rails.logger.info("---------------------course_info_statistic: #{subject.id}")
         data = Subjects::CourseUsedInfoService.call(subject)
@@ -57,6 +57,7 @@ namespace :subjects do
           str << ("(#{subject.id}, #{key[:school_id]}, '#{key[:school_name]}', #{key[:course_count]}, " +
               "#{key[:student_count]}, #{key[:choice_shixun_num]}, #{key[:choice_shixun_frequency]}, " +
               "'#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}', '#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}')")
+          puts "str: #{str}"
           if str.size == 1000
             sql = "REPLACE INTO subject_course_records(#{column_value}) VALUES #{str.uniq.join(",")}"
             str_c = str