Add latest changes from gitlab-org/gitlab@master

1 files changed, 30 insertions, 0 deletions

diff --git a/db/post_migrate/20191002031332_schedule_pages_metadata_migration.rb b/db/post_migrate/20191002031332_schedule_pages_metadata_migration.rb
new file mode 100644
index 00000000000..0cd24da50d0
--- /dev/null
+++ b/db/post_migrate/20191002031332_schedule_pages_metadata_migration.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+class SchedulePagesMetadataMigration < ActiveRecord::Migration[5.2]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  BATCH_SIZE = 10_000
+  MIGRATION = 'MigratePagesMetadata'
+
+  disable_ddl_transaction!
+
+  class Project < ActiveRecord::Base
+    include ::EachBatch
+
+    self.table_name = 'projects'
+  end
+
+  def up
+    say "Scheduling `#{MIGRATION}` jobs"
+
+    # At the time of writing there are ~10_669_292 records to be inserted for GitLab.com,
+    # batches of 10_000 with delay interval of 2 minutes gives us an estimate of close to 36 hours.
+    queue_background_migration_jobs_by_range_at_intervals(Project, MIGRATION, 2.minutes, batch_size: BATCH_SIZE)
+  end
+
+  def down
+    # no-op
+  end
+end