Class: Debloater::Engine

Inherits:
Object
  • Object
show all
Includes:
Helpers
Defined in:
lib/debloater/engine.rb

Instance Method Summary collapse

Methods included from Helpers

#_fatal, #_log

Constructor Details

#initialize(conn, confirm: true, min_mb: 50, max_density: 0.75) ⇒ Engine

Returns a new instance of Engine.



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# File 'lib/debloater/engine.rb', line 9

def initialize(conn, confirm: true, min_mb: 50, max_density: 0.75)
  @conn = conn
  @confirm = confirm
  @min_mb = min_mb
  @max_density = max_density
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/debloater/engine.rb', line 17

def run
  debloated_indices = []
  Index.each(@conn) do |index|
    if index.pkey?
      _log "Skipping primary key index '#{index.name}'"
      next
    end

    unless index.valid?
      _log "Skipping invalid (non-Btree) index '#{index.name}'"
      next
    end

    puts format('%<name>-65s %<size>10d %<frag>3d pct %<bloat>6d MB' % {
      name:  index.name,
      size:  index.size,
      frag:  (100 - index.density * 100).to_i,
      bloat: index.bloat,
    })

    if index.bloat < @min_mb || index.density > @max_density
      _log "Skipping non-bloated index '#{index.name}'"
      next
    end

    if @confirm
      $stderr.write "debloat this index? [y/N] "
      next unless $stdin.gets.strip =~ /^y$/i
    end

    index.debloat!
    debloated_indices << index
  end
  debloated_indices
end