mirror of https://github.com/mastodon/mastodon.git
Make CopyStatusStats migration use batches of 1000 to avoid locks (#8256)
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@ -3,13 +3,16 @@ class CopyStatusStats < ActiveRecord::Migration[5.2]
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def up
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def up
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safety_assured do
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safety_assured do
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execute <<-SQL.squish
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Status.where.not(id: StatusStat.select('status_id')).select('id').find_in_batches do |statuses|
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INSERT INTO status_stats (status_id, reblogs_count, favourites_count, created_at, updated_at)
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execute <<-SQL.squish
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SELECT id, reblogs_count, favourites_count, created_at, updated_at
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INSERT INTO status_stats (status_id, reblogs_count, favourites_count, created_at, updated_at)
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FROM statuses
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SELECT id, reblogs_count, favourites_count, created_at, updated_at
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ON CONFLICT (status_id) DO UPDATE
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FROM statuses
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SET reblogs_count = EXCLUDED.reblogs_count, favourites_count = EXCLUDED.favourites_count
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WHERE id IN (#{statuses.map(&:id).join(', ')})
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SQL
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ON CONFLICT (status_id) DO UPDATE
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SET reblogs_count = EXCLUDED.reblogs_count, favourites_count = EXCLUDED.favourites_count
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SQL
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end
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end
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end
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end
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end
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