Class: Gitlab::Database::Partitioning::MonthlyStrategy

Inherits:
Object
  • Object
show all
Defined in:
lib/gitlab/database/partitioning/monthly_strategy.rb

Constant Summary collapse

HEADROOM =

We create this many partitions in the future

6.months

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model, partitioning_key, retain_for: nil, retain_non_empty_partitions: false, analyze_interval: nil) ⇒ MonthlyStrategy

Returns a new instance of MonthlyStrategy.



14
15
16
17
18
19
20
21
22
 
# File 'lib/gitlab/database/partitioning/monthly_strategy.rb', line 14

def initialize(
  model, partitioning_key, retain_for: nil, retain_non_empty_partitions: false,
  analyze_interval: nil)
  @model = model
  @partitioning_key = partitioning_key
  @retain_for = retain_for
  @retain_non_empty_partitions = retain_non_empty_partitions
  @analyze_interval = analyze_interval
end

Instance Attribute Details

#analyze_interval ⇒ Object (readonly)

Returns the value of attribute analyze_interval.



7
8
9
 
# File 'lib/gitlab/database/partitioning/monthly_strategy.rb', line 7

def analyze_interval
  @analyze_interval
end

#model ⇒ Object (readonly)

Returns the value of attribute model.



7
8
9
 
# File 'lib/gitlab/database/partitioning/monthly_strategy.rb', line 7

def model
  @model
end

#partitioning_key ⇒ Object (readonly)

Returns the value of attribute partitioning_key.



7
8
9
 
# File 'lib/gitlab/database/partitioning/monthly_strategy.rb', line 7

def partitioning_key
  @partitioning_key
end

#retain_for ⇒ Object (readonly)

Returns the value of attribute retain_for.



7
8
9
 
# File 'lib/gitlab/database/partitioning/monthly_strategy.rb', line 7

def retain_for
  @retain_for
end

#retain_non_empty_partitions ⇒ Object (readonly)

Returns the value of attribute retain_non_empty_partitions.



7
8
9
 
# File 'lib/gitlab/database/partitioning/monthly_strategy.rb', line 7

def retain_non_empty_partitions
  @retain_non_empty_partitions
end

Instance Method Details

#after_adding_partitions ⇒ Object 



42
43
44
 
# File 'lib/gitlab/database/partitioning/monthly_strategy.rb', line 42

def after_adding_partitions
  # No-op, required by the partition manager
end

#current_partitions ⇒ Object 



24
25
26
27
28
 
# File 'lib/gitlab/database/partitioning/monthly_strategy.rb', line 24

def current_partitions
  Gitlab::Database::PostgresPartition.for_parent_table(table_name).map do |partition|
    TimePartition.from_sql(table_name, partition.name, partition.condition)
  end
end

#extra_partitions ⇒ Object 



35
36
37
38
39
40
 
# File 'lib/gitlab/database/partitioning/monthly_strategy.rb', line 35

def extra_partitions
  partitions = current_partitions - desired_partitions
  partitions.reject!(&:holds_data?) if retain_non_empty_partitions

  partitions
end

#missing_partitions ⇒ Object

Check the currently existing partitions and determine which ones are missing



31
32
33
 
# File 'lib/gitlab/database/partitioning/monthly_strategy.rb', line 31

def missing_partitions
  desired_partitions - current_partitions
end

#validate_and_fix ⇒ Object 



46
47
48
 
# File 'lib/gitlab/database/partitioning/monthly_strategy.rb', line 46

def validate_and_fix
  # No-op, required by the partition manager
end