blob: fce1829c98271485d82616f0607b6ad45bf39eaf (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
# frozen_string_literal: true
# rubocop:disable GitlabSecurity/SqlInjection
class SchedulePopulateMergeRequestMetricsWithEventsData < ActiveRecord::Migration
DOWNTIME = false
BATCH_SIZE = 10_000
MIGRATION = 'PopulateMergeRequestMetricsWithEventsData'
disable_ddl_transaction!
class MergeRequest < ActiveRecord::Base
self.table_name = 'merge_requests'
include ::EachBatch
end
def up
say 'Scheduling `PopulateMergeRequestMetricsWithEventsData` jobs'
# It will update around 4_000_000 records in batches of 10_000 merge
# requests (running between 10 minutes) and should take around 66 hours to complete.
# Apparently, production PostgreSQL is able to vacuum 10k-20k dead_tuples by
# minute, and at maximum, each of these jobs should UPDATE 20k records.
#
# More information about the updates in `PopulateMergeRequestMetricsWithEventsData` class.
#
MergeRequest.all.each_batch(of: BATCH_SIZE) do |relation, index|
range = relation.pluck('MIN(id)', 'MAX(id)').first
BackgroundMigrationWorker.perform_in(index * 10.minutes, MIGRATION, range)
end
end
def down
execute "update merge_request_metrics set latest_closed_at = null"
execute "update merge_request_metrics set latest_closed_by_id = null"
execute "update merge_request_metrics set merged_by_id = null"
end
end
|
