forked from elastic/built-docs
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy path_profiling_aggregations.html
401 lines (381 loc) · 17.2 KB
/
_profiling_aggregations.html
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
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
342
343
344
345
346
347
348
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
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
<!DOCTYPE html>
<html lang="en-us">
<head>
<meta charset="UTF-8">
<title>Profiling Aggregations | Elasticsearch Guide [6.3] | Elastic</title>
<meta class="elastic" name="content" content="Profiling Aggregations | Elasticsearch Guide [6.3]">
<link rel="home" href="index.html" title="Elasticsearch Guide [6.3]"/>
<link rel="up" href="search-profile.html" title="Profile API"/>
<link rel="prev" href="_profiling_queries.html" title="Profiling Queries"/>
<link rel="next" href="_profiling_considerations.html" title="Profiling Considerations"/>
<meta class="elastic" name="product_version" content="6.3"/>
<meta class="elastic" name="product_name" content="Elasticsearch"/>
<meta class="elastic" name="website_area" content="documentation"/>
<meta name="DC.type" content="Learn/Docs/Elasticsearch/Reference/6.3"/>
<meta name="DC.subject" content="Elasticsearch"/>
<meta name="DC.identifier" content="6.3"/>
<meta name="robots" content="noindex,nofollow"/>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src="https://cdn.optimizely.com/js/18132920325.js"></script>
<link rel="apple-touch-icon" sizes="57x57" href="/apple-icon-57x57.png">
<link rel="apple-touch-icon" sizes="60x60" href="/apple-icon-60x60.png">
<link rel="apple-touch-icon" sizes="72x72" href="/apple-icon-72x72.png">
<link rel="apple-touch-icon" sizes="76x76" href="/apple-icon-76x76.png">
<link rel="apple-touch-icon" sizes="114x114" href="/apple-icon-114x114.png">
<link rel="apple-touch-icon" sizes="120x120" href="/apple-icon-120x120.png">
<link rel="apple-touch-icon" sizes="144x144" href="/apple-icon-144x144.png">
<link rel="apple-touch-icon" sizes="152x152" href="/apple-icon-152x152.png">
<link rel="apple-touch-icon" sizes="180x180" href="/apple-icon-180x180.png">
<link rel="icon" type="image/png" href="/favicon-32x32.png" sizes="32x32">
<link rel="icon" type="image/png" href="/android-chrome-192x192.png" sizes="192x192">
<link rel="icon" type="image/png" href="/favicon-96x96.png" sizes="96x96">
<link rel="icon" type="image/png" href="/favicon-16x16.png" sizes="16x16">
<link rel="manifest" href="/manifest.json">
<meta name="apple-mobile-web-app-title" content="Elastic">
<meta name="application-name" content="Elastic">
<meta name="msapplication-TileColor" content="#ffffff">
<meta name="msapplication-TileImage" content="/mstile-144x144.png">
<meta name="theme-color" content="#ffffff">
<meta name="naver-site-verification" content="936882c1853b701b3cef3721758d80535413dbfd" />
<meta name="yandex-verification" content="d8a47e95d0972434" />
<meta name="localized" content="true" />
<meta name="st:robots" content="follow,index" />
<meta property="og:image" content="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/blt280217a63b82a734/6202d3378b1f312528798412/elastic-logo.svg" />
<meta property="og:image:width" content="500" />
<meta property="og:image:height" content="172" />
<link rel="shortcut icon" href="/favicon.ico" type="image/x-icon">
<link rel="icon" href="/favicon.ico" type="image/x-icon">
<link rel="apple-touch-icon-precomposed" sizes="64x64" href="/favicon_64x64_16bit.png">
<link rel="apple-touch-icon-precomposed" sizes="32x32" href="/favicon_32x32.png">
<link rel="apple-touch-icon-precomposed" sizes="16x16" href="/favicon_16x16.png">
<!-- Give IE8 a fighting chance -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]-->
<link rel="stylesheet" type="text/css" href="/guide/static/styles.css" />
</head>
<!--© 2015-2022 Elasticsearch B.V. -->
<!-- All Elastic documentation is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. -->
<!-- http://creativecommons.org/licenses/by-nc-nd/4.0/ -->
<body>
<!-- Google Tag Manager -->
<script>dataLayer = [];</script><noscript><iframe src="//www.googletagmanager.com/ns.html?id=GTM-58RLH5" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= '//www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer','GTM-58RLH5');</script>
<!-- End Google Tag Manager -->
<!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-12395217-16"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'UA-12395217-16');
</script>
<!-- Google Tag Manager for GA4 -->
<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-KNJMG2M');</script>
<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-KNJMG2M" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
<!-- End Google Tag Manager for GA4-->
<div id='elastic-nav' style="display:none;"></div>
<script src='https://www.elastic.co/elastic-nav.js'></script>
<div class="main-container">
<section id="content" >
<div class="content-wrapper">
<section id="guide" lang="en">
<div class="container-fluid">
<div class="row pb-3">
<div class="col-12 order-2 col-md-4 order-md-1 col-lg-3 h-almost-full-md sticky-top-md" id="left_col">
<!-- The TOC is appended here -->
</div>
<div class="col-12 order-1 col-md-8 order-md-2 col-lg-7 order-lg-2 guide-section" id="middle_col">
<!-- start body -->
<div class="page_header">
<strong>IMPORTANT</strong>: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
<a href="../current/index.html">current release documentation</a>.
</div>
<div id="content">
<div class="breadcrumbs">
<span class="breadcrumb-link"><a href="/guide/">Elastic Docs</a></span>
<span class="chevron-right">›</span><span class="breadcrumb-link"><a href="index.html">Elasticsearch Guide [6.3]</a></span>
<span class="chevron-right">›</span><span class="breadcrumb-link"><a href="search.html">Search APIs</a></span>
<span class="chevron-right">›</span><span class="breadcrumb-link"><a href="search-profile.html">Profile API</a></span>
</div>
<div class="navheader">
<span class="prev">
<a href="_profiling_queries.html">« Profiling Queries</a>
</span>
<span class="next">
<a href="_profiling_considerations.html">Profiling Considerations »</a>
</span>
</div>
<div class="section">
<div class="titlepage"><div><div>
<h2 class="title"><a id="_profiling_aggregations"></a>Profiling Aggregations<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/6.3/docs/reference/search/profile.asciidoc">edit</a></h2>
</div></div></div>
<div class="section">
<div class="titlepage"><div><div>
<h3 class="title"><a id="agg-section"></a><code class="literal">aggregations</code> Section<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/6.3/docs/reference/search/profile.asciidoc">edit</a></h3>
</div></div></div>
<p>The <code class="literal">aggregations</code> section contains detailed timing of the aggregation tree executed by a particular shard.
The overall structure of this aggregation tree will resemble your original Elasticsearch request. Let’s
execute the previous query again and look at the aggregation profile this time:</p>
<div class="pre_wrapper lang-console">
<pre class="programlisting prettyprint lang-console">GET /twitter/_search
{
"profile": true,
"query": {
"term": {
"user": {
"value": "test"
}
}
},
"aggs": {
"my_scoped_agg": {
"terms": {
"field": "likes"
}
},
"my_global_agg": {
"global": {},
"aggs": {
"my_level_agg": {
"terms": {
"field": "likes"
}
}
}
}
},
"post_filter": {
"match": {
"message": "some"
}
}
}</pre>
</div>
<div class="console_widget" data-snippet="snippets/346.console"></div>
<p>Which yields the following aggregation profile output</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js">{
"profile" : {
"shards" : [
{
"aggregations" : [
{
"type" : "LongTermsAggregator",
"description" : "my_scoped_agg",
"time_in_nanos" : 195386,
"breakdown" : {
"reduce" : 0,
"build_aggregation" : 81171,
"build_aggregation_count" : 1,
"initialize" : 22753,
"initialize_count" : 1,
"reduce_count" : 0,
"collect" : 91456,
"collect_count" : 4
}
},
{
"type" : "GlobalAggregator",
"description" : "my_global_agg",
"time_in_nanos" : 190430,
"breakdown" : {
"reduce" : 0,
"build_aggregation" : 59990,
"build_aggregation_count" : 1,
"initialize" : 29619,
"initialize_count" : 1,
"reduce_count" : 0,
"collect" : 100815,
"collect_count" : 4
},
"children" : [
{
"type" : "LongTermsAggregator",
"description" : "my_level_agg",
"time_in_nanos" : 160329,
"breakdown" : {
"reduce" : 0,
"build_aggregation" : 55712,
"build_aggregation_count" : 1,
"initialize" : 10559,
"initialize_count" : 1,
"reduce_count" : 0,
"collect" : 94052,
"collect_count" : 4
}
}
]
}
]
}
]
}
}</pre>
</div>
<p>From the profile structure we can see that the <code class="literal">my_scoped_agg</code> is internally being run as a <code class="literal">LongTermsAggregator</code> (because the field it is
aggregating, <code class="literal">likes</code>, is a numeric field). At the same level, we see a <code class="literal">GlobalAggregator</code> which comes from <code class="literal">my_global_agg</code>. That
aggregation then has a child <code class="literal">LongTermsAggregator</code> which from the second terms aggregation on <code class="literal">likes</code>.</p>
<p>The <code class="literal">time_in_nanos</code> field shows the time executed by each aggregation, and is inclusive of all children. While the overall time is useful,
the <code class="literal">breakdown</code> field will give detailed stats about how the time was spent.</p>
<div class="section">
<div class="titlepage"><div><div>
<h4 class="title"><a id="_timing_breakdown_2"></a>Timing Breakdown<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/6.3/docs/reference/search/profile.asciidoc">edit</a></h4>
</div></div></div>
<p>The <code class="literal">breakdown</code> component lists detailed timing statistics about low-level Lucene execution:</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js">"breakdown": {
"reduce": 0,
"reduce_count": 0,
"build_aggregation": 49765,
"build_aggregation_count": 300,
"initialize": 52785,
"initialize_count": 300,
"reduce_count": 0,
"collect": 3155490036,
"collect_count": 1800
}</pre>
</div>
<p>Timings are listed in wall-clock nanoseconds and are not normalized at all. All caveats about the overall
<code class="literal">time</code> apply here. The intention of the breakdown is to give you a feel for A) what machinery in Elasticsearch is
actually eating time, and B) the magnitude of differences in times between the various components. Like the overall time,
the breakdown is inclusive of all children times.</p>
<p>The meaning of the stats are as follows:</p>
<h4><a id="_all_parameters_4"></a>All parameters:<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/6.3/docs/reference/search/profile.asciidoc">edit</a></h4>
<div class="informaltable">
<table border="0" cellpadding="4px">
<colgroup>
<col/>
<col/>
</colgroup>
<tbody valign="top">
<tr>
<td valign="top">
<p>
<code class="literal">initialise</code>
</p>
</td>
<td valign="top">
<p>
This times how long it takes to create and initialise the aggregation before starting to collect documents.
</p>
</td>
</tr>
<tr>
<td valign="top">
<p>
<code class="literal">collect</code>
</p>
</td>
<td valign="top">
<p>
This represents the cumulative time spent in the collect phase of the aggregation. This is where matching documents are passed to the aggregation and the state of the aggregator is updated based on the information contained in the documents.
</p>
</td>
</tr>
<tr>
<td valign="top">
<p>
<code class="literal">build_aggregation</code>
</p>
</td>
<td valign="top">
<p>
This represents the time spent creating the shard level results of the aggregation ready to pass back to the reducing node after the collection of documents is finished.
</p>
</td>
</tr>
<tr>
<td valign="top">
<p>
<code class="literal">reduce</code>
</p>
</td>
<td valign="top">
<p>
This is not currently used and will always report <code class="literal">0</code>. Currently aggregation profiling only times the shard level parts of the aggregation execution. Timing of the reduce phase will be added later.
</p>
</td>
</tr>
<tr>
<td valign="top">
<p>
<code class="literal">*_count</code>
</p>
</td>
<td valign="top">
<p>
Records the number of invocations of the particular method. For example, <code class="literal">"collect_count": 2,</code>
means the <code class="literal">collect()</code> method was called on two different documents.
</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
</div>
<div class="navfooter">
<span class="prev">
<a href="_profiling_queries.html">« Profiling Queries</a>
</span>
<span class="next">
<a href="_profiling_considerations.html">Profiling Considerations »</a>
</span>
</div>
</div>
<!-- end body -->
</div>
<div class="col-12 order-3 col-lg-2 order-lg-3 h-almost-full-lg sticky-top-lg" id="right_col">
<div id="sticky_content">
<!-- The OTP is appended here -->
<div class="row">
<div class="col-0 col-md-4 col-lg-0" id="bottom_left_col"></div>
<div class="col-12 col-md-8 col-lg-12">
<div id="rtpcontainer">
<div class="mktg-promo" id="most-popular">
<p class="aside-heading">Most Popular</p>
<div class="pb-2">
<p class="media-type">Video</p>
<a href="https://www.elastic.co/webinars/getting-started-elasticsearch?page=docs&placement=top-video">
<p class="mb-0">Get Started with Elasticsearch</p>
</a>
</div>
<div class="pb-2">
<p class="media-type">Video</p>
<a href="https://www.elastic.co/webinars/getting-started-kibana?page=docs&placement=top-video">
<p class="mb-0">Intro to Kibana</p>
</a>
</div>
<div class="pb-2">
<p class="media-type">Video</p>
<a href="https://www.elastic.co/webinars/introduction-elk-stack?page=docs&placement=top-video">
<p class="mb-0">ELK for Logs & Metrics</p>
</a>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</section>
</div>
<div id='elastic-footer'></div>
<script src='https://www.elastic.co/elastic-footer.js'></script>
<!-- Footer Section end-->
</section>
</div>
<script src="/guide/static/jquery.js"></script>
<script type="text/javascript" src="/guide/static/docs.js"></script>
<script type="text/javascript">
window.initial_state = {}</script>
</body>
</html>