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
|
/**
* Copyright (C) 2019-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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 <memory>
#include <vector>
#include "mongo/platform/atomic_word.h"
namespace mongo {
class BSONObjBuilder;
class OperationContext;
class ServiceContext;
struct TargetStats {
// the op targeted all shards that own chunks for the collection as long as the total number of
// shards in the cluster is > 1
AtomicWord<int> allShards;
// the op targeted > 1 shard that own chunks for the collection as long as the total number of
// shards in the cluster is > 1
AtomicWord<int> manyShards;
// the op targeted 1 shard (if there exists only one shard, the metric will count as 'oneShard')
AtomicWord<int> oneShard;
// the collection is unsharded
AtomicWord<int> unsharded;
};
class NumHostsTargetedMetrics {
public:
enum QueryType {
kFindCmd,
kInsertCmd,
kUpdateCmd,
kDeleteCmd,
kAggregateCmd,
kNumQueryType,
};
enum TargetType { kAllShards, kManyShards, kOneShard, kUnsharded };
void addNumHostsTargeted(QueryType queryType, TargetType targetType);
void appendSection(BSONObjBuilder* builder);
TargetType parseTargetType(OperationContext* opCtx,
int nShardsTargeted,
int nShardsOwningChunks);
static NumHostsTargetedMetrics& get(ServiceContext* serviceContext);
static NumHostsTargetedMetrics& get(OperationContext* opCtx);
void startup();
private:
std::vector<std::unique_ptr<TargetStats>> _numHostsTargeted;
};
} // namespace mongo
|
