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
|
/**
* Copyright (C) 2014 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include "mongo/platform/atomic_proxy.h"
#include "mongo/platform/atomic_word.h"
namespace mongo {
//
// multi-plan ranking
//
// Max number of times we call work() on plans before comparing them,
// for small collections.
extern AtomicInt32 internalQueryPlanEvaluationWorks;
// For large collections, the number times we work() candidate plans is
// taken as this fraction of the collection size.
extern AtomicDouble internalQueryPlanEvaluationCollFraction;
// Stop working plans once a plan returns this many results.
extern AtomicInt32 internalQueryPlanEvaluationMaxResults;
// Do we give a big ranking bonus to intersection plans?
extern AtomicBool internalQueryForceIntersectionPlans;
// Do we have ixisect on at all?
extern AtomicBool internalQueryPlannerEnableIndexIntersection;
// Do we use hash-based intersection for rooted $and queries?
extern AtomicBool internalQueryPlannerEnableHashIntersection;
//
// plan cache
//
// How many entries in the cache?
extern AtomicInt32 internalQueryCacheSize;
// How many feedback entries do we collect before possibly evicting from the cache based on bad
// performance?
extern AtomicInt32 internalQueryCacheFeedbacksStored;
// How many times more works must we perform in order to justify plan cache eviction
// and replanning?
extern AtomicDouble internalQueryCacheEvictionRatio;
//
// Planning and enumeration.
//
// How many indexed solutions will QueryPlanner::plan output?
extern AtomicInt32 internalQueryPlannerMaxIndexedSolutions;
// How many solutions will the enumerator consider at each OR?
extern AtomicInt32 internalQueryEnumerationMaxOrSolutions;
// How many intersections will the enumerator consider at each AND?
extern AtomicInt32 internalQueryEnumerationMaxIntersectPerAnd;
// Do we want to plan each child of the OR independently?
extern AtomicBool internalQueryPlanOrChildrenIndependently;
// How many index scans are we willing to produce in order to obtain a sort order
// during explodeForSort?
extern AtomicInt32 internalQueryMaxScansToExplode;
// Allow the planner to generate covered whole index scans, rather than falling back to a COLLSCAN.
extern AtomicBool internalQueryPlannerGenerateCoveredWholeIndexScans;
// Ignore unknown JSON Schema keywords.
extern AtomicBool internalQueryIgnoreUnknownJSONSchemaKeywords;
//
// Query execution.
//
extern AtomicInt32 internalQueryExecMaxBlockingSortBytes;
// Yield after this many "should yield?" checks.
extern AtomicInt32 internalQueryExecYieldIterations;
// Yield if it's been at least this many milliseconds since we last yielded.
extern AtomicInt32 internalQueryExecYieldPeriodMS;
// Limit the size that we write without yielding to 16MB / 64 (max expected number of indexes)
const int64_t insertVectorMaxBytes = 256 * 1024;
// The number of bytes to buffer at once during a $facet stage.
extern AtomicInt32 internalQueryFacetBufferSizeBytes;
extern AtomicInt32 internalInsertMaxBatchSize;
extern AtomicInt32 internalDocumentSourceCursorBatchSizeBytes;
extern AtomicInt32 internalDocumentSourceLookupCacheSizeBytes;
extern AtomicBool internalQueryProhibitBlockingMergeOnMongoS;
} // namespace mongo
|
