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# frozen_string_literal: true
# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.
class EnqueueResetMergeStatus < ActiveRecord::Migration[5.1]
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
BATCH_SIZE = 10_000
MIGRATION = 'ResetMergeStatus'
DELAY_INTERVAL = 5.minutes.to_i
disable_ddl_transaction!
def up
say 'Scheduling `ResetMergeStatus` jobs'
# We currently have around 135_000 opened, mergeable MRs in GitLab.com. This iteration
# will schedule around 13 batches of 10_000 MRs, which should take around 1 hour to
# complete.
relation = MergeRequest.where(state: 'opened', merge_status: 'can_be_merged')
relation.each_batch(of: BATCH_SIZE) do |batch, index|
range = batch.pluck('MIN(id)', 'MAX(id)').first
BackgroundMigrationWorker.perform_in(index * DELAY_INTERVAL, MIGRATION, range)
end
end
end
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