58 lines
1.6 KiB
Ruby
58 lines
1.6 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
module Gitlab
|
|
module Metrics
|
|
module Samplers
|
|
class DatabaseSampler < BaseSampler
|
|
SAMPLING_INTERVAL_SECONDS = 5
|
|
|
|
METRIC_PREFIX = 'gitlab_database_connection_pool_'
|
|
|
|
METRIC_DESCRIPTIONS = {
|
|
size: 'Total connection pool capacity',
|
|
connections: 'Current connections in the pool',
|
|
busy: 'Connections in use where the owner is still alive',
|
|
dead: 'Connections in use where the owner is not alive',
|
|
idle: 'Connections not in use',
|
|
waiting: 'Threads currently waiting on this queue'
|
|
}.freeze
|
|
|
|
def metrics
|
|
@metrics ||= init_metrics
|
|
end
|
|
|
|
def sample
|
|
host_stats.each do |host_stat|
|
|
METRIC_DESCRIPTIONS.each_key do |metric|
|
|
metrics[metric].set(host_stat[:labels], host_stat[:stats][metric])
|
|
end
|
|
end
|
|
end
|
|
|
|
private
|
|
|
|
def init_metrics
|
|
METRIC_DESCRIPTIONS.map do |name, description|
|
|
[name, ::Gitlab::Metrics.gauge(:"#{METRIC_PREFIX}#{name}", description)]
|
|
end.to_h
|
|
end
|
|
|
|
def host_stats
|
|
return [] unless ActiveRecord::Base.connected?
|
|
|
|
[{ labels: labels_for_class(ActiveRecord::Base), stats: ActiveRecord::Base.connection_pool.stat }]
|
|
end
|
|
|
|
def labels_for_class(klass)
|
|
{
|
|
host: klass.connection_config[:host],
|
|
port: klass.connection_config[:port],
|
|
class: klass.to_s
|
|
}
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
Gitlab::Metrics::Samplers::DatabaseSampler.prepend_if_ee('EE::Gitlab::Metrics::Samplers::DatabaseSampler')
|