Statistics

EventStoreDB servers collect internal statistics and make it available via HTTP over the http://<host>:2113/stats in JSON format. Here, 2113 is the default external HTTP port. Monitoring applications and metric collectors can use this endpoint to gather the information about the cluster node. The stats endpoint only exposes information about the node where you fetch it from and doesn't contain any cluster information.

What you see in the stats endpoint response is the last collected state of the server. The server collects this information using events that are appended to the statistics stream. Each node has one. We use a reserved name for the stats stream, $stats-<host:port>. For example, for a single node running locally the stream name would be $stats-127.0.0.1:2113.

As all other events, stats events are also linked in the $all stream. These events have a reserved event type $statsCollected.

Click here to see an example of a stats event
{
  "proc-startTime": "2020-06-25T10:13:26.8281750Z",
  "proc-id": 5465,
  "proc-mem": 118648832,
  "proc-cpu": 2.44386363,
  "proc-cpuScaled": 0.152741477,
  "proc-threadsCount": 10,
  "proc-contentionsRate": 0.9012223,
  "proc-thrownExceptionsRate": 0.0,
  "sys-cpu": 100.0,
  "sys-freeMem": 25100288,
  "proc-gc-allocationSpeed": 0.0,
  "proc-gc-gen0ItemsCount": 8,
  "proc-gc-gen0Size": 0,
  "proc-gc-gen1ItemsCount": 2,
  "proc-gc-gen1Size": 0,
  "proc-gc-gen2ItemsCount": 0,
  "proc-gc-gen2Size": 0,
  "proc-gc-largeHeapSize": 0,
  "proc-gc-timeInGc": 0.0,
  "proc-gc-totalBytesInHeaps": 0,
  "proc-tcp-connections": 0,
  "proc-tcp-receivingSpeed": 0.0,
  "proc-tcp-sendingSpeed": 0.0,
  "proc-tcp-inSend": 0,
  "proc-tcp-measureTime": "00:00:19.0534210",
  "proc-tcp-pendingReceived": 0,
  "proc-tcp-pendingSend": 0,
  "proc-tcp-receivedBytesSinceLastRun": 0,
  "proc-tcp-receivedBytesTotal": 0,
  "proc-tcp-sentBytesSinceLastRun": 0,
  "proc-tcp-sentBytesTotal": 0,
  "es-checksum": 1613144,
  "es-checksumNonFlushed": 1613144,
  "sys-drive-/System/Volumes/Data-availableBytes": 545628151808,
  "sys-drive-/System/Volumes/Data-totalBytes": 2000481927168,
  "sys-drive-/System/Volumes/Data-usage": "72%",
  "sys-drive-/System/Volumes/Data-usedBytes": 1454853775360,
  "es-queue-Index Committer-queueName": "Index Committer",
  "es-queue-Index Committer-groupName": "",
  "es-queue-Index Committer-avgItemsPerSecond": 0,
  "es-queue-Index Committer-avgProcessingTime": 0.0,
  "es-queue-Index Committer-currentIdleTime": "0:00:00:29.9895180",
  "es-queue-Index Committer-currentItemProcessingTime": null,
  "es-queue-Index Committer-idleTimePercent": 100.0,
  "es-queue-Index Committer-length": 0,
  "es-queue-Index Committer-lengthCurrentTryPeak": 0,
  "es-queue-Index Committer-lengthLifetimePeak": 0,
  "es-queue-Index Committer-totalItemsProcessed": 0,
  "es-queue-Index Committer-inProgressMessage": "<none>",
  "es-queue-Index Committer-lastProcessedMessage": "<none>",
  "es-queue-MainQueue-queueName": "MainQueue",
  "es-queue-MainQueue-groupName": "",
  "es-queue-MainQueue-avgItemsPerSecond": 14,
  "es-queue-MainQueue-avgProcessingTime": 0.0093527972027972021,
  "es-queue-MainQueue-currentIdleTime": "0:00:00:00.8050567",
  "es-queue-MainQueue-currentItemProcessingTime": null,
  "es-queue-MainQueue-idleTimePercent": 99.986616840364917,
  "es-queue-MainQueue-length": 0,
  "es-queue-MainQueue-lengthCurrentTryPeak": 3,
  "es-queue-MainQueue-lengthLifetimePeak": 6,
  "es-queue-MainQueue-totalItemsProcessed": 452,
  "es-queue-MainQueue-inProgressMessage": "<none>",
  "es-queue-MainQueue-lastProcessedMessage": "Schedule",
  "es-queue-MonitoringQueue-queueName": "MonitoringQueue",
  "es-queue-MonitoringQueue-groupName": "",
  "es-queue-MonitoringQueue-avgItemsPerSecond": 0,
  "es-queue-MonitoringQueue-avgProcessingTime": 1.94455,
  "es-queue-MonitoringQueue-currentIdleTime": "0:00:00:19.0601186",
  "es-queue-MonitoringQueue-currentItemProcessingTime": null,
  "es-queue-MonitoringQueue-idleTimePercent": 99.980537727681721,
  "es-queue-MonitoringQueue-length": 0,
  "es-queue-MonitoringQueue-lengthCurrentTryPeak": 0,
  "es-queue-MonitoringQueue-lengthLifetimePeak": 0,
  "es-queue-MonitoringQueue-totalItemsProcessed": 14,
  "es-queue-MonitoringQueue-inProgressMessage": "<none>",
  "es-queue-MonitoringQueue-lastProcessedMessage": "GetFreshTcpConnectionStats",
  "es-queue-PersistentSubscriptions-queueName": "PersistentSubscriptions",
  "es-queue-PersistentSubscriptions-groupName": "",
  "es-queue-PersistentSubscriptions-avgItemsPerSecond": 1,
  "es-queue-PersistentSubscriptions-avgProcessingTime": 0.010400000000000001,
  "es-queue-PersistentSubscriptions-currentIdleTime": "0:00:00:00.8052015",
  "es-queue-PersistentSubscriptions-currentItemProcessingTime": null,
  "es-queue-PersistentSubscriptions-idleTimePercent": 99.998954276430226,
  "es-queue-PersistentSubscriptions-length": 0,
  "es-queue-PersistentSubscriptions-lengthCurrentTryPeak": 0,
  "es-queue-PersistentSubscriptions-lengthLifetimePeak": 0,
  "es-queue-PersistentSubscriptions-totalItemsProcessed": 32,
  "es-queue-PersistentSubscriptions-inProgressMessage": "<none>",
  "es-queue-PersistentSubscriptions-lastProcessedMessage": "PersistentSubscriptionTimerTick",
  "es-queue-Projection Core #0-queueName": "Projection Core #0",
  "es-queue-Projection Core #0-groupName": "Projection Core",
  "es-queue-Projection Core #0-avgItemsPerSecond": 0,
  "es-queue-Projection Core #0-avgProcessingTime": 0.0,
  "es-queue-Projection Core #0-currentIdleTime": "0:00:00:29.9480513",
  "es-queue-Projection Core #0-currentItemProcessingTime": null,
  "es-queue-Projection Core #0-idleTimePercent": 100.0,
  "es-queue-Projection Core #0-length": 0,
  "es-queue-Projection Core #0-lengthCurrentTryPeak": 0,
  "es-queue-Projection Core #0-lengthLifetimePeak": 0,
  "es-queue-Projection Core #0-totalItemsProcessed": 2,
  "es-queue-Projection Core #0-inProgressMessage": "<none>",
  "es-queue-Projection Core #0-lastProcessedMessage": "SubComponentStarted",
  "es-queue-Projections Master-queueName": "Projections Master",
  "es-queue-Projections Master-groupName": "",
  "es-queue-Projections Master-avgItemsPerSecond": 0,
  "es-queue-Projections Master-avgProcessingTime": 0.0,
  "es-queue-Projections Master-currentIdleTime": "0:00:00:29.8467445",
  "es-queue-Projections Master-currentItemProcessingTime": null,
  "es-queue-Projections Master-idleTimePercent": 100.0,
  "es-queue-Projections Master-length": 0,
  "es-queue-Projections Master-lengthCurrentTryPeak": 0,
  "es-queue-Projections Master-lengthLifetimePeak": 3,
  "es-queue-Projections Master-totalItemsProcessed": 10,
  "es-queue-Projections Master-inProgressMessage": "<none>",
  "es-queue-Projections Master-lastProcessedMessage": "RegularTimeout",
  "es-queue-Storage Chaser-queueName": "Storage Chaser",
  "es-queue-Storage Chaser-groupName": "",
  "es-queue-Storage Chaser-avgItemsPerSecond": 94,
  "es-queue-Storage Chaser-avgProcessingTime": 0.0043385023898035047,
  "es-queue-Storage Chaser-currentIdleTime": "0:00:00:00.0002530",
  "es-queue-Storage Chaser-currentItemProcessingTime": null,
  "es-queue-Storage Chaser-idleTimePercent": 99.959003031702224,
  "es-queue-Storage Chaser-length": 0,
  "es-queue-Storage Chaser-lengthCurrentTryPeak": 0,
  "es-queue-Storage Chaser-lengthLifetimePeak": 0,
  "es-queue-Storage Chaser-totalItemsProcessed": 2835,
  "es-queue-Storage Chaser-inProgressMessage": "<none>",
  "es-queue-Storage Chaser-lastProcessedMessage": "ChaserCheckpointFlush",
  "es-queue-StorageReaderQueue #1-queueName": "StorageReaderQueue #1",
  "es-queue-StorageReaderQueue #1-groupName": "StorageReaderQueue",
  "es-queue-StorageReaderQueue #1-avgItemsPerSecond": 0,
  "es-queue-StorageReaderQueue #1-avgProcessingTime": 0.22461000000000003,
  "es-queue-StorageReaderQueue #1-currentIdleTime": "0:00:00:00.9863988",
  "es-queue-StorageReaderQueue #1-currentItemProcessingTime": null,
  "es-queue-StorageReaderQueue #1-idleTimePercent": 99.988756844383616,
  "es-queue-StorageReaderQueue #1-length": 0,
  "es-queue-StorageReaderQueue #1-lengthCurrentTryPeak": 0,
  "es-queue-StorageReaderQueue #1-lengthLifetimePeak": 0,
  "es-queue-StorageReaderQueue #1-totalItemsProcessed": 15,
  "es-queue-StorageReaderQueue #1-inProgressMessage": "<none>",
  "es-queue-StorageReaderQueue #1-lastProcessedMessage": "ReadStreamEventsBackward",
  "es-queue-StorageReaderQueue #2-queueName": "StorageReaderQueue #2",
  "es-queue-StorageReaderQueue #2-groupName": "StorageReaderQueue",
  "es-queue-StorageReaderQueue #2-avgItemsPerSecond": 0,
  "es-queue-StorageReaderQueue #2-avgProcessingTime": 8.83216,
  "es-queue-StorageReaderQueue #2-currentIdleTime": "0:00:00:00.8051068",
  "es-queue-StorageReaderQueue #2-currentItemProcessingTime": null,
  "es-queue-StorageReaderQueue #2-idleTimePercent": 99.557874170777851,
  "es-queue-StorageReaderQueue #2-length": 0,
  "es-queue-StorageReaderQueue #2-lengthCurrentTryPeak": 0,
  "es-queue-StorageReaderQueue #2-lengthLifetimePeak": 0,
  "es-queue-StorageReaderQueue #2-totalItemsProcessed": 16,
  "es-queue-StorageReaderQueue #2-inProgressMessage": "<none>",
  "es-queue-StorageReaderQueue #2-lastProcessedMessage": "ReadStreamEventsForward",
  "es-queue-StorageReaderQueue #3-queueName": "StorageReaderQueue #3",
  "es-queue-StorageReaderQueue #3-groupName": "StorageReaderQueue",
  "es-queue-StorageReaderQueue #3-avgItemsPerSecond": 0,
  "es-queue-StorageReaderQueue #3-avgProcessingTime": 6.4189888888888893,
  "es-queue-StorageReaderQueue #3-currentIdleTime": "0:00:00:02.8228372",
  "es-queue-StorageReaderQueue #3-currentItemProcessingTime": null,
  "es-queue-StorageReaderQueue #3-idleTimePercent": 99.710808119472517,
  "es-queue-StorageReaderQueue #3-length": 0,
  "es-queue-StorageReaderQueue #3-lengthCurrentTryPeak": 0,
  "es-queue-StorageReaderQueue #3-lengthLifetimePeak": 0,
  "es-queue-StorageReaderQueue #3-totalItemsProcessed": 14,
  "es-queue-StorageReaderQueue #3-inProgressMessage": "<none>",
  "es-queue-StorageReaderQueue #3-lastProcessedMessage": "ReadStreamEventsForward",
  "es-queue-StorageReaderQueue #4-queueName": "StorageReaderQueue #4",
  "es-queue-StorageReaderQueue #4-groupName": "StorageReaderQueue",
  "es-queue-StorageReaderQueue #4-avgItemsPerSecond": 0,
  "es-queue-StorageReaderQueue #4-avgProcessingTime": 0.36447,
  "es-queue-StorageReaderQueue #4-currentIdleTime": "0:00:00:01.8144419",
  "es-queue-StorageReaderQueue #4-currentItemProcessingTime": null,
  "es-queue-StorageReaderQueue #4-idleTimePercent": 99.981747643099709,
  "es-queue-StorageReaderQueue #4-length": 0,
  "es-queue-StorageReaderQueue #4-lengthCurrentTryPeak": 0,
  "es-queue-StorageReaderQueue #4-lengthLifetimePeak": 0,
  "es-queue-StorageReaderQueue #4-totalItemsProcessed": 14,
  "es-queue-StorageReaderQueue #4-inProgressMessage": "<none>",
  "es-queue-StorageReaderQueue #4-lastProcessedMessage": "ReadStreamEventsForward",
  "es-queue-StorageWriterQueue-queueName": "StorageWriterQueue",
  "es-queue-StorageWriterQueue-groupName": "",
  "es-queue-StorageWriterQueue-avgItemsPerSecond": 0,
  "es-queue-StorageWriterQueue-avgProcessingTime": 0.0,
  "es-queue-StorageWriterQueue-currentIdleTime": "0:00:00:29.9437790",
  "es-queue-StorageWriterQueue-currentItemProcessingTime": null,
  "es-queue-StorageWriterQueue-idleTimePercent": 100.0,
  "es-queue-StorageWriterQueue-length": 0,
  "es-queue-StorageWriterQueue-lengthCurrentTryPeak": 0,
  "es-queue-StorageWriterQueue-lengthLifetimePeak": 0,
  "es-queue-StorageWriterQueue-totalItemsProcessed": 6,
  "es-queue-StorageWriterQueue-inProgressMessage": "<none>",
  "es-queue-StorageWriterQueue-lastProcessedMessage": "WritePrepares",
  "es-queue-Subscriptions-queueName": "Subscriptions",
  "es-queue-Subscriptions-groupName": "",
  "es-queue-Subscriptions-avgItemsPerSecond": 1,
  "es-queue-Subscriptions-avgProcessingTime": 0.057019047619047622,
  "es-queue-Subscriptions-currentIdleTime": "0:00:00:00.8153708",
  "es-queue-Subscriptions-currentItemProcessingTime": null,
  "es-queue-Subscriptions-idleTimePercent": 99.993992971356,
  "es-queue-Subscriptions-length": 0,
  "es-queue-Subscriptions-lengthCurrentTryPeak": 0,
  "es-queue-Subscriptions-lengthLifetimePeak": 0,
  "es-queue-Subscriptions-totalItemsProcessed": 31,
  "es-queue-Subscriptions-inProgressMessage": "<none>",
  "es-queue-Subscriptions-lastProcessedMessage": "CheckPollTimeout",
  "es-queue-Timer-queueName": "Timer",
  "es-queue-Timer-groupName": "",
  "es-queue-Timer-avgItemsPerSecond": 14,
  "es-queue-Timer-avgProcessingTime": 0.038568989547038329,
  "es-queue-Timer-currentIdleTime": "0:00:00:00.0002752",
  "es-queue-Timer-currentItemProcessingTime": null,
  "es-queue-Timer-idleTimePercent": 99.94364205726194,
  "es-queue-Timer-length": 17,
  "es-queue-Timer-lengthCurrentTryPeak": 17,
  "es-queue-Timer-lengthLifetimePeak": 17,
  "es-queue-Timer-totalItemsProcessed": 419,
  "es-queue-Timer-inProgressMessage": "<none>",
  "es-queue-Timer-lastProcessedMessage": "ExecuteScheduledTasks",
  "es-queue-Worker #1-queueName": "Worker #1",
  "es-queue-Worker #1-groupName": "Workers",
  "es-queue-Worker #1-avgItemsPerSecond": 2,
  "es-queue-Worker #1-avgProcessingTime": 0.076058695652173922,
  "es-queue-Worker #1-currentIdleTime": "0:00:00:00.8050943",
  "es-queue-Worker #1-currentItemProcessingTime": null,
  "es-queue-Worker #1-idleTimePercent": 99.982484504768721,
  "es-queue-Worker #1-length": 0,
  "es-queue-Worker #1-lengthCurrentTryPeak": 0,
  "es-queue-Worker #1-lengthLifetimePeak": 0,
  "es-queue-Worker #1-totalItemsProcessed": 73,
  "es-queue-Worker #1-inProgressMessage": "<none>",
  "es-queue-Worker #1-lastProcessedMessage": "ReadStreamEventsForwardCompleted",
  "es-queue-Worker #2-queueName": "Worker #2",
  "es-queue-Worker #2-groupName": "Workers",
  "es-queue-Worker #2-avgItemsPerSecond": 2,
  "es-queue-Worker #2-avgProcessingTime": 0.19399347826086957,
  "es-queue-Worker #2-currentIdleTime": "0:00:00:00.8356863",
  "es-queue-Worker #2-currentItemProcessingTime": null,
  "es-queue-Worker #2-idleTimePercent": 99.955350254886739,
  "es-queue-Worker #2-length": 0,
  "es-queue-Worker #2-lengthCurrentTryPeak": 0,
  "es-queue-Worker #2-lengthLifetimePeak": 0,
  "es-queue-Worker #2-totalItemsProcessed": 69,
  "es-queue-Worker #2-inProgressMessage": "<none>",
  "es-queue-Worker #2-lastProcessedMessage": "PurgeTimedOutRequests",
  "es-queue-Worker #3-queueName": "Worker #3",
  "es-queue-Worker #3-groupName": "Workers",
  "es-queue-Worker #3-avgItemsPerSecond": 2,
  "es-queue-Worker #3-avgProcessingTime": 0.068475555555555567,
  "es-queue-Worker #3-currentIdleTime": "0:00:00:00.8356754",
  "es-queue-Worker #3-currentItemProcessingTime": null,
  "es-queue-Worker #3-idleTimePercent": 99.984583460721979,
  "es-queue-Worker #3-length": 0,
  "es-queue-Worker #3-lengthCurrentTryPeak": 0,
  "es-queue-Worker #3-lengthLifetimePeak": 0,
  "es-queue-Worker #3-totalItemsProcessed": 68,
  "es-queue-Worker #3-inProgressMessage": "<none>",
  "es-queue-Worker #3-lastProcessedMessage": "PurgeTimedOutRequests",
  "es-queue-Worker #4-queueName": "Worker #4",
  "es-queue-Worker #4-groupName": "Workers",
  "es-queue-Worker #4-avgItemsPerSecond": 2,
  "es-queue-Worker #4-avgProcessingTime": 0.040221428571428575,
  "es-queue-Worker #4-currentIdleTime": "0:00:00:00.8356870",
  "es-queue-Worker #4-currentItemProcessingTime": null,
  "es-queue-Worker #4-idleTimePercent": 99.99154911144629,
  "es-queue-Worker #4-length": 0,
  "es-queue-Worker #4-lengthCurrentTryPeak": 0,
  "es-queue-Worker #4-lengthLifetimePeak": 0,
  "es-queue-Worker #4-totalItemsProcessed": 65,
  "es-queue-Worker #4-inProgressMessage": "<none>",
  "es-queue-Worker #4-lastProcessedMessage": "PurgeTimedOutRequests",
  "es-queue-Worker #5-queueName": "Worker #5",
  "es-queue-Worker #5-groupName": "Workers",
  "es-queue-Worker #5-avgItemsPerSecond": 2,
  "es-queue-Worker #5-avgProcessingTime": 0.17759268292682928,
  "es-queue-Worker #5-currentIdleTime": "0:00:00:00.8052165",
  "es-queue-Worker #5-currentItemProcessingTime": null,
  "es-queue-Worker #5-idleTimePercent": 99.9635548548067,
  "es-queue-Worker #5-length": 0,
  "es-queue-Worker #5-lengthCurrentTryPeak": 0,
  "es-queue-Worker #5-lengthLifetimePeak": 0,
  "es-queue-Worker #5-totalItemsProcessed": 70,
  "es-queue-Worker #5-inProgressMessage": "<none>",
  "es-queue-Worker #5-lastProcessedMessage": "IODispatcherDelayedMessage",
  "es-writer-lastFlushSize": 0,
  "es-writer-lastFlushDelayMs": 0.0134,
  "es-writer-meanFlushSize": 0,
  "es-writer-meanFlushDelayMs": 0.0134,
  "es-writer-maxFlushSize": 0,
  "es-writer-maxFlushDelayMs": 0.0134,
  "es-writer-queuedFlushMessages": 0,
  "es-readIndex-cachedRecord": 676,
  "es-readIndex-notCachedRecord": 0,
  "es-readIndex-cachedStreamInfo": 171,
  "es-readIndex-notCachedStreamInfo": 32,
  "es-readIndex-cachedTransInfo": 0,
  "es-readIndex-notCachedTransInfo": 0
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
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
113
114
115
116
117
118
119
120
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
159
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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
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
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299

Stats stream has the max time-to-live set to 24 hours, so all the events that are older than 24 hours will be deleted.

Stats period

Using this setting you can control how often stats events are generated. By default, the node will produce one event in 30 seconds. If you want to decrease network pressure on subscribers to the $all stream, you can tell EventStoreDB to produce stats less often.

FormatSyntax
Command line--stats-period-sec
YAMLStatsPeriodSec
Environment variableEVENTSTORE_STATS_PERIOD_SEC

Default: 30

Write stats to database

As mentioned before, stats events are quite large and whilst it is sometimes beneficial to keep the stats history, it is most of the time not necessary. Therefore, we do not write stats events to the database by default. When this option is set to true, all the stats events will be persisted.

As mentioned before, stats events have a TTL of 24 hours and when writing stats to the database is enabled, you'd need to scavenge more often to release the disk space.

FormatSyntax
Command line--write-stats-to-db
YAMLWriteStatsToDb
Environment variableEVENTSTORE_WRITE_STATS_TO_DB

Default: false