Class: Gitlab::Metrics::Samplers::DatabaseSampler

Inherits:
BaseSampler show all
Defined in:
lib/gitlab/metrics/samplers/database_sampler.rb

Constant Summary collapse

DEFAULT_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

Instance Attribute Summary

Attributes inherited from BaseSampler

#interval

Attributes inherited from Daemon

#thread

Instance Method Summary collapse

Methods inherited from BaseSampler

#initialize, #safe_sample, #sleep_interval

Methods inherited from Daemon

#enabled?, #initialize, initialize_instance, instance, #start, #stop, #thread?, #thread_name

Constructor Details

This class inherits a constructor from Gitlab::Metrics::Samplers::BaseSampler

Instance Method Details

#metrics ⇒ Object 



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# File 'lib/gitlab/metrics/samplers/database_sampler.rb', line 20

def metrics
  @metrics ||= init_metrics
end

#sample ⇒ Object 



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# File 'lib/gitlab/metrics/samplers/database_sampler.rb', line 24

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