blob: 7a22e324bdb3f0f5f06ea59cb018ed1619657dc8 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
# 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
# Performs automatic reindexing for a limited number of indexes per call
# 1. Consume from the explicit reindexing queue
# 2. Apply bloat heuristic to find most bloated indexes and reindex those
def self.automatic_reindexing(maximum_records: DEFAULT_INDEXES_PER_INVOCATION)
# Cleanup leftover temporary indexes from previous, possibly aborted runs (if any)
cleanup_leftovers!
# Consume from the explicit reindexing queue first
done_counter = perform_from_queue(maximum_records: maximum_records)
return if done_counter >= maximum_records
# Execute reindexing based on bloat heuristic
perform_with_heuristic(maximum_records: maximum_records - done_counter)
end
# Reindex based on bloat heuristic for a limited number of indexes per call
#
# We use a bloat heuristic to estimate the index bloat and pick the
# most bloated indexes for reindexing.
def self.perform_with_heuristic(candidate_indexes = Gitlab::Database::PostgresIndex.reindexing_support, maximum_records: DEFAULT_INDEXES_PER_INVOCATION)
IndexSelection.new(candidate_indexes).take(maximum_records).each do |index|
Coordinator.new(index).perform
end
end
# Reindex indexes that have been explicitly enqueued (for a limited number of indexes per call)
def self.perform_from_queue(maximum_records: DEFAULT_INDEXES_PER_INVOCATION)
QueuedAction.in_queue_order.limit(maximum_records).each do |queued_entry|
Coordinator.new(queued_entry.index).perform
queued_entry.done!
rescue StandardError => e
queued_entry.failed!
Gitlab::AppLogger.error("Failed to perform reindexing action on queued entry #{queued_entry}: #{e}")
end.size
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(
connection: index.connection,
timing_configuration: REMOVE_INDEX_RETRY_CONFIG,
klass: self.class,
logger: Gitlab::AppLogger
)
retries.run(raise_on_exhaustion: false) do
index.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
|
