dead parallel

app/services/subjects/user_used_info_service.rb

@@ -13,7 +13,7 @@ class Subjects::UserUsedInfoService < ApplicationService
     users_info = []
     users = User.includes(myshixuns: :games).where(myshixuns: {shixun_id: shixun_ids}, games: {status: 2}, users: {is_test: false})
     users.find_in_batches(batch_size: 500) do |u|
-      Parallel.each(u, in_processes: 3) do |user|
+      Parallel.each(u, in_processes: 2) do |user|
         myshixuns = user.myshixuns.select{|m| shixun_ids.include?(m.shixun_id)}
         name =  "#{user.lastname}#{user.firstname}"
         passed_myshixun_count = myshixuns.select{|m| m.status == 1}.size

lib/tasks/statistic_subject_info.rake

@@ -124,7 +124,7 @@ namespace :subjects do
         "code_line_count, evaluate_count, cost_time, created_at, updated_at"
 
     subjects.find_in_batches(batch_size: 50) do |s|
-      Parallel.each(s, in_processes: 5) do |subject|
+      Parallel.each(s, in_processes: 4) do |subject|
         puts("---------------------user_info_statistic: #{subject.id}")
         data = Subjects::UserUsedInfoService.call(subject)
         data.each do |key|