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Versions: 15
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Contents
module GitLab
module Exporter
module Database
# Helper to collect bloat metrics.
class BloatCollector < Base
def run(type = :btree)
execute(self.class.query_for(type)).each_with_object({}) do |row, h|
h[row["object_name"]] = row
end
end
private
def execute(query)
with_connection_pool do |conn|
conn.exec(query)
end
end
class << self
def query_for(type)
@queries ||= {}
return @queries[type] if @queries[type]
file = File.join(__dir__, "bloat_#{type}.sql")
fail "Unknown bloat query file: #{file}" unless File.exist?(file)
@queries[type] = File.read(file)
end
end
end
# Prober class to gather bloat metrics
class BloatProber
METRIC_KEYS = %w(bloat_ratio bloat_size extra_size real_size).freeze
attr_reader :metrics, :collector, :bloat_types
def initialize(opts,
metrics: PrometheusMetrics.new,
collector: BloatCollector.new(connection_string: opts[:connection_string]))
@metrics = metrics
@collector = collector
@bloat_types = opts[:bloat_types] || %i(btree table)
end
def probe_db
bloat_types.each do |type|
probe_for_type(type)
end
end
def write_to(target)
target.write(metrics.to_s)
end
private
def probe_for_type(type)
collector.run(type).each do |query_name, data|
METRIC_KEYS.each do |key|
metrics.add("gitlab_database_bloat_#{type}_#{key}", data[key].to_f, query_name: query_name)
end
end
self
rescue PG::ConnectionBad
self
end
end
end
end
end
Version data entries
15 entries across 15 versions & 1 rubygems