Class: PgHero::HomeController

Inherits:
ActionController::Base
  • Object
show all
Defined in:
app/controllers/pg_hero/home_controller.rb

Instance Method Summary collapse

Instance Method Details

#connection_stats ⇒ Object 



239
240
241
 
# File 'app/controllers/pg_hero/home_controller.rb', line 239

def connection_stats
  render json: [{name: "Connections", data: @database.connection_stats(**system_params), library: chart_library_options}]
end

#connections ⇒ Object 



349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
 
# File 'app/controllers/pg_hero/home_controller.rb', line 349

def connections
  @title = "Connections"
  connections = @database.connections

  @total_connections = connections.count
  @connection_sources = group_connections(connections, [:database, :user, :source, :ip])
  @connections_by_database = group_connections_by_key(connections, :database)
  @connections_by_user = group_connections_by_key(connections, :user)

  if params[:security] && @database.server_version_num >= 90500
    connections.each do |connection|
      connection[:ssl_status] =
        if connection[:ssl]
          # no way to tell if client used verify-full
          # so connection may not be actually secure
          "SSL"
        else
          # variety of reasons for no SSL
          if !connection[:database].present?
            "Internal Process"
          elsif !connection[:ip]
            if connection[:state]
              "Socket"
            else
              # tcp or socket, don't have permission to tell
              "No SSL"
            end
          else
            # tcp
            # could separate out localhost since this should be safe
            "No SSL"
          end
        end
    end

    @connections_by_ssl_status = group_connections_by_key(connections, :ssl_status)
  end
end

#cpu_usage ⇒ Object 



235
236
237
 
# File 'app/controllers/pg_hero/home_controller.rb', line 235

def cpu_usage
  render json: [{name: "CPU", data: @database.cpu_usage(**system_params).map { |k, v| [k, v ? v.round : v] }, library: chart_library_options}]
end

#enable_query_stats ⇒ Object 



413
414
415
416
417
418
 
# File 'app/controllers/pg_hero/home_controller.rb', line 413

def enable_query_stats
  @database.enable_query_stats
  redirect_backward notice: "Query stats enabled"
rescue ActiveRecord::StatementInvalid
  redirect_backward alert: "The database user does not have permission to enable query stats"
end

#explain ⇒ Object 



281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
 
# File 'app/controllers/pg_hero/home_controller.rb', line 281

def explain
  unless @explain_enabled
    render_text "Explain not enabled", status: :bad_request
    return
  end

  @title = "Explain"
  @query = params[:query]
  @explain_analyze_enabled = PgHero.explain_mode == "analyze"

  # TODO use get + token instead of post so users can share links
  # need to prevent CSRF and DoS
  if request.post? && @query.present?
    begin
      generic_plan = @database.server_version_num >= 160000 && @query.include?("$1")

      explain_options =
        case params[:commit]
        when "Analyze"
          {analyze: true}
        when "Visualize"
          if @explain_analyze_enabled && !generic_plan
            {analyze: true, costs: true, verbose: true, buffers: true, format: "json"}
          else
            {costs: true, verbose: true, format: "json"}
          end
        else
          {}
        end

      explain_options[:generic_plan] = true if generic_plan

      if explain_options[:analyze] && !@explain_analyze_enabled
        render_text "Explain analyze not enabled", status: :bad_request
        return
      end

      @explanation = @database.explain_v2(@query, **explain_options)
      @suggested_index = @database.suggested_indexes(queries: [@query]).first if @database.suggested_indexes_enabled?
      @visualize = params[:commit] == "Visualize"
    rescue ActiveRecord::StatementInvalid => e
      message = e.message
      @error =
        if message == "Unsafe statement"
          "Unsafe statement"
        elsif message.start_with?("PG::UndefinedParameter")
          "Can't explain queries with bind parameters"
        elsif message.include?("EXPLAIN options ANALYZE and GENERIC_PLAN cannot be used together")
          "Can't analyze queries with bind parameters"
        elsif message.start_with?("PG::SyntaxError")
          "Syntax error with query"
        elsif message.start_with?("PG::QueryCanceled")
          "Query timed out"
        else
          # default to a generic message
          # since data can be extracted through the Postgres error message
          "Error explaining query"
        end
    end
  end
end

#free_space_stats ⇒ Object 



275
276
277
278
279
 
# File 'app/controllers/pg_hero/home_controller.rb', line 275

def free_space_stats
  render json: [
    {name: "Free Space", data: @database.free_space_stats(duration: 14.days, period: 1.hour), library: chart_library_options},
  ]
end

#index ⇒ Object 



26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
 
# File 'app/controllers/pg_hero/home_controller.rb', line 26

def index
  @title = "Overview"
  @extended = params[:extended]

  if @replica
    @replication_lag = @database.replication_lag
    @good_replication_lag = @replication_lag ? @replication_lag < 5 : true
  else
    @inactive_replication_slots = @database.replication_slots.select { |r| !r[:active] }
  end

  @walsender_queries, long_running_queries = @database.long_running_queries.partition { |q| q[:backend_type] == "walsender" }
  @autovacuum_queries, @long_running_queries = long_running_queries.partition { |q| q[:query].starts_with?("autovacuum:") }

  connection_states = @database.connection_states
  @total_connections = connection_states.values.sum
  @idle_connections = connection_states["idle in transaction"].to_i

  @good_total_connections = @total_connections < @database.total_connections_threshold
  @good_idle_connections = @idle_connections < 100

  @transaction_id_danger = @database.transaction_id_danger(threshold: 1500000000)

  sequences, @sequences_timeout = rescue_timeout([]) { @database.sequences }
  @readable_sequences, @unreadable_sequences = sequences.partition { |s| s[:readable] }

  @sequence_danger = @database.sequence_danger(threshold: (params[:sequence_threshold] || 0.9).to_f, sequences: @readable_sequences)

  @indexes, @indexes_timeout =
    if @sequences_timeout
      # skip indexes for faster loading
      [[], true]
    else
      rescue_timeout([]) { @database.indexes }
    end
  @invalid_indexes = @database.invalid_indexes(indexes: @indexes)
  @invalid_constraints = @database.invalid_constraints
  @duplicate_indexes = @database.duplicate_indexes(indexes: @indexes)

  if @query_stats_enabled
    @query_stats = @database.query_stats(historical: true, start_at: 3.hours.ago)
    @slow_queries = @database.slow_queries(query_stats: @query_stats)
    set_suggested_indexes((params[:min_average_time] || 20).to_f, (params[:min_calls] || 50).to_i)
  else
    @query_stats_available = @database.query_stats_available?
    @query_stats_extension_enabled = @database.query_stats_extension_enabled? if @query_stats_available
    @suggested_indexes = []
  end

  if @extended
    @index_hit_rate = @database.index_hit_rate || 0
    @table_hit_rate = @database.table_hit_rate || 0
    @good_cache_rate = @table_hit_rate >= @database.cache_hit_rate_threshold / 100.0 && @index_hit_rate >= @database.cache_hit_rate_threshold / 100.0
    @unused_indexes = @database.unused_indexes(max_scans: 0)
  end

  @show_migrations = PgHero.show_migrations
end

#index_bloat ⇒ Object 



122
123
124
125
126
 
# File 'app/controllers/pg_hero/home_controller.rb', line 122

def index_bloat
  @title = "Index Bloat"
  @index_bloat = @database.index_bloat
  @show_sql = params[:sql]
end

#kill ⇒ Object 



395
396
397
398
399
400
401
 
# File 'app/controllers/pg_hero/home_controller.rb', line 395

def kill
  if @database.kill(params[:pid])
    redirect_backward notice: "Query killed"
  else
    redirect_backward notice: "Query no longer running"
  end
end

#kill_all ⇒ Object 



408
409
410
411
 
# File 'app/controllers/pg_hero/home_controller.rb', line 408

def kill_all
  @database.kill_all
  redirect_backward notice: "Connections killed"
end

#kill_long_running_queries ⇒ Object 



403
404
405
406
 
# File 'app/controllers/pg_hero/home_controller.rb', line 403

def kill_long_running_queries
  @database.kill_long_running_queries
  redirect_backward notice: "Queries killed"
end

#live_queries ⇒ Object 



128
129
130
131
132
133
134
135
136
 
# File 'app/controllers/pg_hero/home_controller.rb', line 128

def live_queries
  @title = "Live Queries"
  @running_queries = @database.running_queries(all: true)
  @vacuum_progress = @database.vacuum_progress.index_by { |q| q[:pid] }

  if params[:state]
    @running_queries.select! { |q| q[:state] == params[:state] }
  end
end

#load_stats ⇒ Object 



247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
 
# File 'app/controllers/pg_hero/home_controller.rb', line 247

def load_stats
  stats =
    case @database.system_stats_provider
    when :azure
      if @database.send(:azure_flexible_server?)
        [
          {name: "Read IOPS", data: @database.read_iops_stats(**system_params).map { |k, v| [k, v ? v.round : v] }, library: chart_library_options},
          {name: "Write IOPS", data: @database.write_iops_stats(**system_params).map { |k, v| [k, v ? v.round : v] }, library: chart_library_options}
        ]
      else
        [
          {name: "IO Consumption", data: @database.azure_stats("io_consumption_percent", **system_params), library: chart_library_options}
        ]
      end
    when :gcp
      [
        {name: "Read Ops", data: @database.read_iops_stats(**system_params).map { |k, v| [k, v ? v.round : v] }, library: chart_library_options},
        {name: "Write Ops", data: @database.write_iops_stats(**system_params).map { |k, v| [k, v ? v.round : v] }, library: chart_library_options}
      ]
    else
      [
        {name: "Read IOPS", data: @database.read_iops_stats(**system_params).map { |k, v| [k, v ? v.round : v] }, library: chart_library_options},
        {name: "Write IOPS", data: @database.write_iops_stats(**system_params).map { |k, v| [k, v ? v.round : v] }, library: chart_library_options}
      ]
    end
  render json: stats
end

#maintenance ⇒ Object 



388
389
390
391
392
393
 
# File 'app/controllers/pg_hero/home_controller.rb', line 388

def maintenance
  @title = "Maintenance"
  @maintenance_info = @database.maintenance_info
  @time_zone = PgHero.time_zone
  @show_dead_rows = params[:dead_rows]
end

#queries ⇒ Object 



138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
 
# File 'app/controllers/pg_hero/home_controller.rb', line 138

def queries
  @title = "Queries"
  @sort = %w(average_time calls).include?(params[:sort]) ? params[:sort] : nil
  @min_average_time = params[:min_average_time] ? params[:min_average_time].to_i : nil
  @min_calls = params[:min_calls] ? params[:min_calls].to_i : nil

  if @historical_query_stats_enabled
    begin
      @start_at = params[:start_at] ? Time.zone.parse(params[:start_at]) : 24.hours.ago
      @end_at = Time.zone.parse(params[:end_at]) if params[:end_at]
    rescue
      @error = true
    end
  end

  @query_stats =
    if @historical_query_stats_enabled && !request.xhr?
      []
    else
      @database.query_stats(
        historical: true,
        start_at: @start_at,
        end_at: @end_at,
        sort: @sort,
        min_average_time: @min_average_time,
        min_calls: @min_calls
      )
    end

  if !@historical_query_stats_enabled || request.xhr?
    set_suggested_indexes
  end

  # fix back button issue with caching
  response.headers["Cache-Control"] = "must-revalidate, no-store, no-cache, private"
  if request.xhr?
    render layout: false, partial: "queries_table", locals: {queries: @query_stats, xhr: true}
  end
end

#relation_space ⇒ Object 



114
115
116
117
118
119
120
 
# File 'app/controllers/pg_hero/home_controller.rb', line 114

def relation_space
  @schema = params[:schema] || "public"
  @relation = params[:relation]
  @title = @relation
  relation_space_stats = @database.relation_space_stats(@relation, schema: @schema)
  @chart_data = [{name: "Value", data: relation_space_stats.map { |r| [r[:captured_at].change(sec: 0), r[:size_bytes].to_i] }, library: chart_library_options}]
end

#replication_lag_stats ⇒ Object 



243
244
245
 
# File 'app/controllers/pg_hero/home_controller.rb', line 243

def replication_lag_stats
  render json: [{name: "Lag", data: @database.replication_lag_stats(**system_params), library: chart_library_options}]
end

#reset_query_stats ⇒ Object

TODO disable if historical query stats enabled?



421
422
423
424
425
426
427
428
429
430
431
432
433
434
 
# File 'app/controllers/pg_hero/home_controller.rb', line 421

def reset_query_stats
  success =
    if @database.server_version_num >= 120000
      @database.reset_query_stats
    else
      @database.reset_instance_query_stats
    end

  if success
    redirect_backward notice: "Query stats reset"
  else
    redirect_backward alert: "The database user does not have permission to reset query stats"
  end
end

#show_query ⇒ Object 



178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
 
# File 'app/controllers/pg_hero/home_controller.rb', line 178

def show_query
  @query_hash = params[:query_hash].to_i
  @user = params[:user].to_s
  @title = @query_hash

  stats = @database.query_stats(historical: true, query_hash: @query_hash, start_at: 24.hours.ago).find { |qs| qs[:user] == @user }
  if stats
    @query = stats[:query]
    @explainable_query = stats[:explainable_query]

    if @show_details
      query_hash_stats = @database.query_hash_stats(@query_hash, user: @user, current: true)

      @chart_data = [{name: "Value", data: query_hash_stats.map { |r| [r[:captured_at].change(sec: 0), (r[:total_minutes] * 60 * 1000).round] }, library: chart_library_options}]
      @chart2_data = [{name: "Value", data: query_hash_stats.map { |r| [r[:captured_at].change(sec: 0), r[:average_time].round(1)] }, library: chart_library_options}]
      @chart3_data = [{name: "Value", data: query_hash_stats.map { |r| [r[:captured_at].change(sec: 0), r[:calls]] }, library: chart_library_options}]

      @origins = query_hash_stats.group_by { |r| r[:origin].to_s }.to_h { |k, v| [k, v.size] }
      @total_count = query_hash_stats.size
    end

    @tables = PgQuery.parse(@query).tables rescue []
    @tables.sort!

    if @tables.any?
      @row_counts = @database.table_stats(table: @tables).to_h { |i| [i[:table], i[:estimated_rows]] }
      indexes, @indexes_timeout = rescue_timeout([]) { @database.indexes }
      @indexes_by_table = indexes.group_by { |i| i[:table] }
    end
  else
    render_text "Unknown query", status: :not_found
  end
end

#space ⇒ Object 



85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
 
# File 'app/controllers/pg_hero/home_controller.rb', line 85

def space
  @title = "Space"
  @days = (params[:days] || 7).to_i
  @database_size = @database.database_size
  @only_tables = params[:tables].present?
  @relation_sizes, @sizes_timeout = rescue_timeout([]) { @only_tables ? @database.table_sizes : @database.relation_sizes }
  @space_stats_enabled = @database.space_stats_enabled? && !@only_tables
  if @space_stats_enabled
    space_growth = @database.space_growth(days: @days, relation_sizes: @relation_sizes)
    @growth_bytes_by_relation = space_growth.to_h { |r| [[r[:schema], r[:relation]], r[:growth_bytes]] }
    if params[:sort] == "growth"
      @relation_sizes.sort_by! { |r| s = @growth_bytes_by_relation[[r[:schema], r[:relation]]]; [s ? 0 : 1, -s.to_i, r[:schema], r[:relation]] }
    end
  end

  if params[:sort] == "name"
    @relation_sizes.sort_by! { |r| r[:relation] || r[:table] }
  end

  @header_options = @only_tables ? {tables: "t"} : {}

  across = params[:across].to_s.split(",")
  @unused_indexes = @database.unused_indexes(max_scans: 0, across: across)
  @unused_index_names = Set.new(@unused_indexes.map { |r| r[:index] })
  @show_migrations = PgHero.show_migrations
  @system_stats_enabled = @database.system_stats_enabled?
  @index_bloat = [] # @database.index_bloat
end

#system ⇒ Object 



212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
 
# File 'app/controllers/pg_hero/home_controller.rb', line 212

def system
  @title = "System"
  @periods = {
    "1 hour" => {duration: 1.hour, period: 60.seconds},
    "1 day" => {duration: 1.day, period: 10.minutes},
    "1 week" => {duration: 1.week, period: 30.minutes},
    "2 weeks" => {duration: 2.weeks, period: 1.hours}
  }
  if @database.system_stats_provider == :azure
    # doesn't support 10, just 5 and 15
    @periods["1 day"][:period] = 15.minutes
  end

  @duration = (params[:duration] || 1.hour).to_i
  @period = (params[:period] || 60.seconds).to_i

  if @duration / @period > 1440
    render_text "Too many data points", status: :bad_request
  elsif @period % 60 != 0
    render_text "Period must be a multiple of 60", status: :bad_request
  end
end

#tune ⇒ Object 



343
344
345
346
347
 
# File 'app/controllers/pg_hero/home_controller.rb', line 343

def tune
  @title = "Tune"
  @settings = @database.settings
  @autovacuum_settings = @database.autovacuum_settings if params[:autovacuum]
end