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 



215
216
217
 
# File 'app/controllers/pg_hero/home_controller.rb', line 215

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

#connections ⇒ Object 



271
272
273
274
275
276
277
278
 
# File 'app/controllers/pg_hero/home_controller.rb', line 271

def connections
  @title = "Connections"
  @connection_sources = @database.connection_sources
  @total_connections = @connection_sources.sum { |cs| cs[:total_connections] }

  @connections_by_database = group_connections(@connection_sources, :database)
  @connections_by_user = group_connections(@connection_sources, :user)
end

#cpu_usage ⇒ Object 



211
212
213
 
# File 'app/controllers/pg_hero/home_controller.rb', line 211

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

#enable_query_stats ⇒ Object 



304
305
306
307
308
309
 
# File 'app/controllers/pg_hero/home_controller.rb', line 304

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 



236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
 
# File 'app/controllers/pg_hero/home_controller.rb', line 236

def explain
  @title = "Explain"
  @query = params[:query]
  # TODO use get + token instead of post so users can share links
  # need to prevent CSRF and DoS
  if request.post? && @query
    begin
      prefix =
        case params[:commit]
        when "Analyze"
          "ANALYZE "
        when "Visualize"
          "(ANALYZE, COSTS, VERBOSE, BUFFERS, FORMAT JSON) "
        else
          ""
        end
      @explanation = @database.explain("#{prefix}#{@query}")
      @suggested_index = @database.suggested_indexes(queries: [@query]).first if @database.suggested_indexes_enabled?
      @visualize = params[:commit] == "Visualize"
    rescue ActiveRecord::StatementInvalid => e
      @error = e.message

      if @error.include?("bind message supplies 0 parameters")
        @error = "Can't explain queries with bind parameters"
      end
    end
  end
end

#free_space_stats ⇒ Object 



230
231
232
233
234
 
# File 'app/controllers/pg_hero/home_controller.rb', line 230

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 



21
22
23
24
25
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
 
# File 'app/controllers/pg_hero/home_controller.rb', line 21

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

  @autovacuum_queries, @long_running_queries = @database.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)

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

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

  @indexes = @database.indexes
  @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 



105
106
107
108
109
 
# File 'app/controllers/pg_hero/home_controller.rb', line 105

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

#kill ⇒ Object 



286
287
288
289
290
291
292
 
# File 'app/controllers/pg_hero/home_controller.rb', line 286

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 



299
300
301
302
 
# File 'app/controllers/pg_hero/home_controller.rb', line 299

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

#kill_long_running_queries ⇒ Object 



294
295
296
297
 
# File 'app/controllers/pg_hero/home_controller.rb', line 294

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

#live_queries ⇒ Object 



111
112
113
114
115
116
117
118
119
 
# File 'app/controllers/pg_hero/home_controller.rb', line 111

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 



223
224
225
226
227
228
 
# File 'app/controllers/pg_hero/home_controller.rb', line 223

def load_stats
  render json: [
    {name: "Read IOPS", data: @database.read_iops_stats(system_params).map { |k, v| [k, v.round] }, library: chart_library_options},
    {name: "Write IOPS", data: @database.write_iops_stats(system_params).map { |k, v| [k, v.round] }, library: chart_library_options}
  ]
end

#maintenance ⇒ Object 



280
281
282
283
284
 
# File 'app/controllers/pg_hero/home_controller.rb', line 280

def maintenance
  @title = "Maintenance"
  @maintenance_info = @database.maintenance_info
  @time_zone = PgHero.time_zone
end

#queries ⇒ Object 



121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
 
# File 'app/controllers/pg_hero/home_controller.rb', line 121

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

  @indexes = @database.indexes
  set_suggested_indexes

  # 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 



97
98
99
100
101
102
103
 
# File 'app/controllers/pg_hero/home_controller.rb', line 97

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 



219
220
221
 
# File 'app/controllers/pg_hero/home_controller.rb', line 219

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

#reset_query_stats ⇒ Object 



311
312
313
314
315
316
 
# File 'app/controllers/pg_hero/home_controller.rb', line 311

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

#show_query ⇒ Object 



160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
 
# File 'app/controllers/pg_hero/home_controller.rb', line 160

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)

      @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 = Hash[query_hash_stats.group_by { |r| r[:origin].to_s }.map { |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 = Hash[@database.table_stats(table: @tables).map { |i| [i[:table], i[:estimated_rows]] }]
      @indexes_by_table = @database.indexes.group_by { |i| i[:table] }
    end
  else
    render_text "Unknown query"
  end
end

#space ⇒ Object 



72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
 
# File 'app/controllers/pg_hero/home_controller.rb', line 72

def space
  @title = "Space"
  @days = (params[:days] || 7).to_i
  @database_size = @database.database_size
  @relation_sizes = params[:tables] ? @database.table_sizes : @database.relation_sizes
  @space_stats_enabled = @database.space_stats_enabled? && !params[:tables]
  if @space_stats_enabled
    space_growth = @database.space_growth(days: @days, relation_sizes: @relation_sizes)
    @growth_bytes_by_relation = Hash[ space_growth.map { |r| [[r[:schema], r[:relation]], r[:growth_bytes]] } ]
    case params[:sort]
    when "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]] }
    when "name"
      @relation_sizes.sort_by! { |r| r[:relation] || r[:table] }
    end
  end

  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 



193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
 
# File 'app/controllers/pg_hero/home_controller.rb', line 193

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

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

#tune ⇒ Object 



265
266
267
268
269
 
# File 'app/controllers/pg_hero/home_controller.rb', line 265

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