44 lines
1.7 KiB
Ruby
44 lines
1.7 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
module Gitlab
|
|
module Database
|
|
module Reindexing
|
|
# Number of indexes to reindex per invocation
|
|
DEFAULT_INDEXES_PER_INVOCATION = 2
|
|
|
|
SUPPORTED_TYPES = %w(btree gist).freeze
|
|
|
|
# When dropping an index, we acquire a SHARE UPDATE EXCLUSIVE lock,
|
|
# which only conflicts with DDL and vacuum. We therefore execute this with a rather
|
|
# high lock timeout and a long pause in between retries. This is an alternative to
|
|
# setting a high statement timeout, which would lead to a long running query with effects
|
|
# on e.g. vacuum.
|
|
REMOVE_INDEX_RETRY_CONFIG = [[1.minute, 9.minutes]] * 30
|
|
|
|
# candidate_indexes: Array of Gitlab::Database::PostgresIndex
|
|
def self.perform(candidate_indexes, how_many: DEFAULT_INDEXES_PER_INVOCATION)
|
|
IndexSelection.new(candidate_indexes).take(how_many).each do |index|
|
|
Coordinator.new(index).perform
|
|
end
|
|
end
|
|
|
|
def self.cleanup_leftovers!
|
|
PostgresIndex.reindexing_leftovers.each do |index|
|
|
Gitlab::AppLogger.info("Removing index #{index.identifier} which is a leftover, temporary index from previous reindexing activity")
|
|
|
|
retries = Gitlab::Database::WithLockRetriesOutsideTransaction.new(
|
|
timing_configuration: REMOVE_INDEX_RETRY_CONFIG,
|
|
klass: self.class,
|
|
logger: Gitlab::AppLogger
|
|
)
|
|
|
|
retries.run(raise_on_exhaustion: false) do
|
|
ApplicationRecord.connection.tap do |conn|
|
|
conn.execute("DROP INDEX CONCURRENTLY IF EXISTS #{conn.quote_table_name(index.schema)}.#{conn.quote_table_name(index.name)}")
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|