33 lines
1 KiB
Ruby
33 lines
1 KiB
Ruby
class ScheduleMergeRequestDiffMigrationsTakeTwo < ActiveRecord::Migration
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = false
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BATCH_SIZE = 500
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MIGRATION = 'DeserializeMergeRequestDiffsAndCommits'
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DELAY_INTERVAL = 10.minutes
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disable_ddl_transaction!
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class MergeRequestDiff < ActiveRecord::Base
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self.table_name = 'merge_request_diffs'
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include ::EachBatch
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default_scope { where('st_commits IS NOT NULL OR st_diffs IS NOT NULL') }
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end
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# By this point, we assume ScheduleMergeRequestDiffMigrations - the first
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# version of this - has already run. On GitLab.com, we have ~220k un-migrated
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# rows, but these rows will, in general, take a long time.
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#
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# With a gap of 10 minutes per batch, and 500 rows per batch, these migrations
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# are scheduled over 220_000 / 500 / 6 ~= 74 hours, which is a little over
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# three days.
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def up
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queue_background_migration_jobs_by_range_at_intervals(MergeRequestDiff, MIGRATION, DELAY_INTERVAL, batch_size: BATCH_SIZE)
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end
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def down
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end
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end
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