gitlab-org--gitlab-foss/db/migrate/20160913162434_remove_projects_pushes_since_gc.rb

# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.

# rubocop:disable Migration/AddColumnWithDefaultToLargeTable
class RemoveProjectsPushesSinceGc < ActiveRecord::Migration
  include Gitlab::Database::MigrationHelpers

  DOWNTIME = true
  DOWNTIME_REASON = 'This migration removes an existing column'

  disable_ddl_transaction!

  def up
    remove_column :projects, :pushes_since_gc
  end

  def down
    add_column_with_default :projects, :pushes_since_gc, :integer, default: 0
  end
end
Move pushes_since_gc to Redis This moves tracking of the pushes since the last Git GC from PostgreSQL to Redis. This reduces the number of writes on the "projects" table. This in turn reduces the vacuuming overhead. The lease used for incrementing the counter has been removed. This lease was mostly put in place to prevent high database load but this isn't needed anymore due to the counter now being stored in Redis. Fixes gitlab-org/gitlab-ce#22125 2016-09-13 12:28:45 -04:00			`# See http://doc.gitlab.com/ce/development/migration_style_guide.html`
			`# for more information on how to write migrations for GitLab.`

Disable AddColumnWithDefaultToLargeTable cop for pre-existing migrations 2017-04-24 13:54:09 -04:00			`# rubocop:disable Migration/AddColumnWithDefaultToLargeTable`
Move pushes_since_gc to Redis This moves tracking of the pushes since the last Git GC from PostgreSQL to Redis. This reduces the number of writes on the "projects" table. This in turn reduces the vacuuming overhead. The lease used for incrementing the counter has been removed. This lease was mostly put in place to prevent high database load but this isn't needed anymore due to the counter now being stored in Redis. Fixes gitlab-org/gitlab-ce#22125 2016-09-13 12:28:45 -04:00			`class RemoveProjectsPushesSinceGc < ActiveRecord::Migration`
			`include Gitlab::Database::MigrationHelpers`

			`DOWNTIME = true`
			`DOWNTIME_REASON = 'This migration removes an existing column'`

			`disable_ddl_transaction!`

			`def up`
			`remove_column :projects, :pushes_since_gc`
			`end`

			`def down`
Fix undefined method when reverting migration RemoveProjectsPushesSinceGc 2016-09-15 21:43:23 -04:00			`add_column_with_default :projects, :pushes_since_gc, :integer, default: 0`
Move pushes_since_gc to Redis This moves tracking of the pushes since the last Git GC from PostgreSQL to Redis. This reduces the number of writes on the "projects" table. This in turn reduces the vacuuming overhead. The lease used for incrementing the counter has been removed. This lease was mostly put in place to prevent high database load but this isn't needed anymore due to the counter now being stored in Redis. Fixes gitlab-org/gitlab-ce#22125 2016-09-13 12:28:45 -04:00			`end`
			`end`