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
|
// top.h : DB usage monitor.
/* Copyright 2009 10gen 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 <boost/date_time/posix_time/posix_time.hpp>
#include "mongo/db/commands.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/stats/operation_latency_histogram.h"
#include "mongo/util/concurrency/mutex.h"
#include "mongo/util/net/message.h"
#include "mongo/util/string_map.h"
namespace mongo {
class ServiceContext;
/**
* tracks usage by collection
*/
class Top {
public:
static Top& get(ServiceContext* service);
Top() = default;
struct UsageData {
UsageData() : time(0), count(0) {}
UsageData(const UsageData& older, const UsageData& newer);
long long time;
long long count;
void inc(long long micros) {
count++;
time += micros;
}
};
struct CollectionData {
/**
* constructs a diff
*/
CollectionData() {}
CollectionData(const CollectionData& older, const CollectionData& newer);
UsageData total;
UsageData readLock;
UsageData writeLock;
UsageData queries;
UsageData getmore;
UsageData insert;
UsageData update;
UsageData remove;
UsageData commands;
OperationLatencyHistogram opLatencyHistogram;
};
typedef StringMap<CollectionData> UsageMap;
public:
void record(OperationContext* txn,
StringData ns,
LogicalOp logicalOp,
int lockType,
long long micros,
bool command,
Command::ReadWriteType readWriteType);
void append(BSONObjBuilder& b);
void cloneMap(UsageMap& out) const;
void collectionDropped(StringData ns, bool databaseDropped = false);
/**
* Appends the collection-level latency statistics
*/
void appendLatencyStats(StringData ns, bool includeHistograms, BSONObjBuilder* builder);
/**
* Increments the global histogram.
*/
void incrementGlobalLatencyStats(OperationContext* txn,
uint64_t latency,
Command::ReadWriteType readWriteType);
/**
* Appends the global latency statistics.
*/
void appendGlobalLatencyStats(bool includeHistograms, BSONObjBuilder* builder);
private:
void _appendToUsageMap(BSONObjBuilder& b, const UsageMap& map) const;
void _appendStatsEntry(BSONObjBuilder& b, const char* statsName, const UsageData& map) const;
void _record(OperationContext* txn,
CollectionData& c,
LogicalOp logicalOp,
int lockType,
long long micros,
Command::ReadWriteType readWriteType);
void _incrementHistogram(OperationContext* txn,
long long latency,
OperationLatencyHistogram* histogram,
Command::ReadWriteType readWriteType);
mutable SimpleMutex _lock;
OperationLatencyHistogram _globalHistogramStats;
UsageMap _usage;
std::string _lastDropped;
};
} // namespace mongo
|