Class: RailsPulse::Jobs::Cards::P95Duration

Inherits:
Cards::Base
  • Object
show all
Defined in:
app/models/rails_pulse/jobs/cards/p95_duration.rb

Instance Method Summary collapse

Constructor Details

#initialize(job: nil, disabled_tags: [], show_non_tagged: true, period: 14, period_type: "day") ⇒ P95Duration

Returns a new instance of P95Duration.



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# File 'app/models/rails_pulse/jobs/cards/p95_duration.rb', line 5

def initialize(job: nil, disabled_tags: [], show_non_tagged: true, period: 14, period_type: "day")
  @job = job
  @disabled_tags = disabled_tags
  @show_non_tagged = show_non_tagged
  @period = period
  @period_type = period_type
end

Instance Method Details

#to_metric_card ⇒ Object 



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# File 'app/models/rails_pulse/jobs/cards/p95_duration.rb', line 13

def to_metric_card
  base_query = RailsPulse::Summary
    .with_tag_filters(@disabled_tags, @show_non_tagged)
    .where(
      summarizable_type: "RailsPulse::Job",
      period_type: @period_type,
      period_start: range_start..now
    )
  base_query = base_query.where(summarizable_id: @job.id) if @job

  metrics = base_query.select(
    "SUM(rails_pulse_summaries.p95_duration * rails_pulse_summaries.count) AS total_weighted_p95",
    "SUM(rails_pulse_summaries.count) AS total_runs",
    "SUM(CASE WHEN rails_pulse_summaries.period_start >= #{quote(current_window_start)} THEN rails_pulse_summaries.p95_duration * rails_pulse_summaries.count ELSE 0 END) AS current_weighted_p95",
    "SUM(CASE WHEN rails_pulse_summaries.period_start >= #{quote(current_window_start)} THEN rails_pulse_summaries.count ELSE 0 END) AS current_runs",
    "SUM(CASE WHEN rails_pulse_summaries.period_start >= #{quote(range_start)} AND rails_pulse_summaries.period_start < #{quote(current_window_start)} THEN rails_pulse_summaries.p95_duration * rails_pulse_summaries.count ELSE 0 END) AS previous_weighted_p95",
    "SUM(CASE WHEN rails_pulse_summaries.period_start >= #{quote(range_start)} AND rails_pulse_summaries.period_start < #{quote(current_window_start)} THEN rails_pulse_summaries.count ELSE 0 END) AS previous_runs"
  ).take

  total_runs = metrics&.total_runs.to_i
  total_weighted_p95 = metrics&.total_weighted_p95.to_f
  current_runs = metrics&.current_runs.to_i
  current_weighted_p95 = metrics&.current_weighted_p95.to_f
  previous_runs = metrics&.previous_runs.to_i
  previous_weighted_p95 = metrics&.previous_weighted_p95.to_f

  p95_duration = weighted_average(total_weighted_p95, total_runs)
  current_p95 = weighted_average(current_weighted_p95, current_runs)
  previous_p95 = weighted_average(previous_weighted_p95, previous_runs)

  trend_icon, trend_amount = trend_for(current_p95, previous_p95) if show_trend?

  grouped_weighted = base_query
    .group_by_date(:period_start)
    .sum(Arel.sql("rails_pulse_summaries.p95_duration * rails_pulse_summaries.count"))

  grouped_counts = base_query
    .group_by_date(:period_start)
    .sum("rails_pulse_summaries.count")

  sparkline_data = sparkline_from_averages(grouped_weighted, grouped_counts)

  {
    id: "jobs_p95_duration",
    chart_color: RailsPulse::ChartColors::P95,
    context: "jobs",
    title: "95th Percentile Duration",
    summary: format_duration(p95_duration),
    chart_data: sparkline_data,
    trend_icon: trend_icon,
    trend_amount: trend_amount,
    trend_text: (show_trend? ? comparison_period_text : nil),
    period_stat: total_runs > 0 ? "Across #{format_number(total_runs)} runs" : period_date_range,
    help_heading: "P95 Duration",
    help_text: "The 95th percentile execution time — 95% of jobs complete faster than this. Weighted by job volume across all classes. A rising P95 indicates jobs are becoming slower, which may cause queue backlog."
  }
end