86 lines
3.4 KiB
Ruby
86 lines
3.4 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Database
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module Reindexing
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# Number of indexes to reindex per invocation
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DEFAULT_INDEXES_PER_INVOCATION = 2
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SUPPORTED_TYPES = %w(btree gist).freeze
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# When dropping an index, we acquire a SHARE UPDATE EXCLUSIVE lock,
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# which only conflicts with DDL and vacuum. We therefore execute this with a rather
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# high lock timeout and a long pause in between retries. This is an alternative to
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# setting a high statement timeout, which would lead to a long running query with effects
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# on e.g. vacuum.
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REMOVE_INDEX_RETRY_CONFIG = [[1.minute, 9.minutes]] * 30
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def self.enabled?
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Feature.enabled?(:database_reindexing, type: :ops)
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end
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def self.invoke(database = nil)
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Gitlab::Database::EachDatabase.each_database_connection do |connection, connection_name|
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next if database && database.to_s != connection_name.to_s
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Gitlab::Database::SharedModel.logger = Logger.new($stdout) if Gitlab::Utils.to_boolean(ENV['LOG_QUERIES_TO_CONSOLE'], default: false)
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# Hack: Before we do actual reindexing work, create async indexes
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Gitlab::Database::AsyncIndexes.create_pending_indexes! if Feature.enabled?(:database_async_index_creation, type: :ops)
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Gitlab::Database::AsyncIndexes.drop_pending_indexes!
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automatic_reindexing
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end
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rescue StandardError => e
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Gitlab::AppLogger.error(e)
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raise
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end
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# Performs automatic reindexing for a limited number of indexes per call
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# 1. Consume from the explicit reindexing queue
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# 2. Apply bloat heuristic to find most bloated indexes and reindex those
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def self.automatic_reindexing(maximum_records: DEFAULT_INDEXES_PER_INVOCATION)
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# Cleanup leftover temporary indexes from previous, possibly aborted runs (if any)
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cleanup_leftovers!
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# Consume from the explicit reindexing queue first
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done_counter = perform_from_queue(maximum_records: maximum_records)
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return if done_counter >= maximum_records
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# Execute reindexing based on bloat heuristic
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perform_with_heuristic(maximum_records: maximum_records - done_counter)
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end
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# Reindex based on bloat heuristic for a limited number of indexes per call
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#
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# We use a bloat heuristic to estimate the index bloat and pick the
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# most bloated indexes for reindexing.
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def self.perform_with_heuristic(candidate_indexes = Gitlab::Database::PostgresIndex.reindexing_support, maximum_records: DEFAULT_INDEXES_PER_INVOCATION)
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IndexSelection.new(candidate_indexes).take(maximum_records).each do |index|
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Coordinator.new(index).perform
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end
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end
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# Reindex indexes that have been explicitly enqueued (for a limited number of indexes per call)
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def self.perform_from_queue(maximum_records: DEFAULT_INDEXES_PER_INVOCATION)
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QueuedAction.in_queue_order.limit(maximum_records).each do |queued_entry|
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Coordinator.new(queued_entry.index).perform
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queued_entry.done!
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rescue StandardError => e
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queued_entry.failed!
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Gitlab::AppLogger.error("Failed to perform reindexing action on queued entry #{queued_entry}: #{e}")
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end.size
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end
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def self.cleanup_leftovers!
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PostgresIndex.reindexing_leftovers.each do |index|
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Coordinator.new(index).drop
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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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