39 lines
1.4 KiB
Ruby
39 lines
1.4 KiB
Ruby
|
# 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 PopulateMrMetricsWithEventsData < ActiveRecord::Migration[4.2]
|
||
|
include Gitlab::Database::MigrationHelpers
|
||
|
|
||
|
DOWNTIME = false
|
||
|
BATCH_SIZE = 10_000
|
||
|
MIGRATION = 'PopulateMergeRequestMetricsWithEventsDataImproved'
|
||
|
PREVIOUS_MIGRATION = 'PopulateMergeRequestMetricsWithEventsData'
|
||
|
|
||
|
disable_ddl_transaction!
|
||
|
|
||
|
def up
|
||
|
# Perform any ongoing background migration that might still be running from
|
||
|
# previous try (see https://gitlab.com/gitlab-org/gitlab-ce/issues/47676).
|
||
|
Gitlab::BackgroundMigration.steal(PREVIOUS_MIGRATION)
|
||
|
|
||
|
say 'Scheduling `PopulateMergeRequestMetricsWithEventsData` jobs'
|
||
|
# It will update around 4_000_000 records in batches of 10_000 merge
|
||
|
# requests (running between 5 minutes) and should take around 53 hours to complete.
|
||
|
# Apparently, production PostgreSQL is able to vacuum 10k-20k dead_tuples
|
||
|
# per minute. So this should give us enough space.
|
||
|
#
|
||
|
# More information about the updates in `PopulateMergeRequestMetricsWithEventsDataImproved` class.
|
||
|
#
|
||
|
MergeRequest.all.each_batch(of: BATCH_SIZE) do |relation, index|
|
||
|
range = relation.pluck('MIN(id)', 'MAX(id)').first
|
||
|
|
||
|
BackgroundMigrationWorker.perform_in(index * 8.minutes, MIGRATION, range)
|
||
|
end
|
||
|
end
|
||
|
|
||
|
def down
|
||
|
end
|
||
|
end
|