diff options
Diffstat (limited to 'db/post_migrate/20171026082505_schedule_merge_request_latest_merge_request_diff_id_migrations.rb')
| -rw-r--r-- | db/post_migrate/20171026082505_schedule_merge_request_latest_merge_request_diff_id_migrations.rb | 29 |
1 files changed, 0 insertions, 29 deletions
diff --git a/db/post_migrate/20171026082505_schedule_merge_request_latest_merge_request_diff_id_migrations.rb b/db/post_migrate/20171026082505_schedule_merge_request_latest_merge_request_diff_id_migrations.rb deleted file mode 100644 index 764561de997..00000000000 --- a/db/post_migrate/20171026082505_schedule_merge_request_latest_merge_request_diff_id_migrations.rb +++ /dev/null @@ -1,29 +0,0 @@ -class ScheduleMergeRequestLatestMergeRequestDiffIdMigrations < ActiveRecord::Migration[4.2] - include Gitlab::Database::MigrationHelpers - - DOWNTIME = false - BATCH_SIZE = 50_000 - MIGRATION = 'PopulateMergeRequestsLatestMergeRequestDiffId' - - disable_ddl_transaction! - - class MergeRequest < ActiveRecord::Base - self.table_name = 'merge_requests' - - include ::EachBatch - end - - # On GitLab.com, we saw that we generated about 500,000 dead tuples over 5 minutes. - # To keep replication lag from ballooning, we'll aim for 50,000 updates over 5 minutes. - # - # Assuming that there are 5 million rows affected (which is more than on - # GitLab.com), and that each batch of 50,000 rows takes up to 5 minutes, then - # we can migrate all the rows in 8.5 hours. - def up - MergeRequest.where(latest_merge_request_diff_id: nil).each_batch(of: BATCH_SIZE) do |relation, index| - range = relation.pluck('MIN(id)', 'MAX(id)').first - - BackgroundMigrationWorker.perform_in(index * 5.minutes, MIGRATION, range) - end - end -end |