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
|
/**
* Copyright (C) 2018-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.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/transaction_metrics_observer.h"
#include "mongo/db/server_transactions_metrics.h"
#include "mongo/db/transaction_participant.h"
namespace mongo {
void TransactionMetricsObserver::onStart(ServerTransactionsMetrics* serverTransactionsMetrics,
bool isAutoCommit,
TickSource* tickSource,
Date_t curWallClockTime,
Date_t expireDate) {
//
// Per transaction metrics.
//
_singleTransactionStats.setStartTime(tickSource->getTicks(), curWallClockTime);
_singleTransactionStats.setAutoCommit(isAutoCommit);
_singleTransactionStats.setExpireDate(expireDate);
//
// Server wide transactions metrics.
//
serverTransactionsMetrics->incrementTotalStarted();
serverTransactionsMetrics->incrementCurrentOpen();
serverTransactionsMetrics->incrementCurrentInactive();
}
void TransactionMetricsObserver::onChooseReadTimestamp(Timestamp readTimestamp) {
_singleTransactionStats.setReadTimestamp(readTimestamp);
}
void TransactionMetricsObserver::onStash(ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource* tickSource) {
//
// Per transaction metrics.
//
invariant(_singleTransactionStats.isActive());
_singleTransactionStats.setInactive(tickSource, tickSource->getTicks());
//
// Server wide transactions metrics.
//
// We accept possible slight inaccuracies in these counters from non-atomicity.
serverTransactionsMetrics->decrementCurrentActive();
serverTransactionsMetrics->incrementCurrentInactive();
}
void TransactionMetricsObserver::onUnstash(ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource* tickSource) {
//
// Per transaction metrics.
//
invariant(!_singleTransactionStats.isActive());
_singleTransactionStats.setActive(tickSource->getTicks());
//
// Server wide transactions metrics.
//
// We accept possible slight inaccuracies in these counters from non-atomicity.
serverTransactionsMetrics->incrementCurrentActive();
serverTransactionsMetrics->decrementCurrentInactive();
}
void TransactionMetricsObserver::onCommit(ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource* tickSource,
boost::optional<repl::OpTime> oldestOplogEntryOpTime,
Top* top) {
//
// Per transaction metrics.
//
// After the transaction has been committed, we must update the end time and mark it as
// inactive. We use the same "now" time to prevent skew in the time-related metrics.
auto curTick = tickSource->getTicks();
_singleTransactionStats.setEndTime(curTick);
invariant(_singleTransactionStats.isActive());
_singleTransactionStats.setInactive(tickSource, curTick);
//
// Server wide transactions metrics.
//
serverTransactionsMetrics->incrementTotalCommitted();
serverTransactionsMetrics->decrementCurrentOpen();
serverTransactionsMetrics->decrementCurrentActive();
if (_singleTransactionStats.isPrepared()) {
serverTransactionsMetrics->incrementTotalPreparedThenCommitted();
serverTransactionsMetrics->decrementCurrentPrepared();
}
auto duration =
durationCount<Microseconds>(_singleTransactionStats.getDuration(tickSource, curTick));
top->incrementGlobalTransactionLatencyStats(static_cast<uint64_t>(duration));
// Remove this transaction's oldest oplog entry OpTime if one was written.
if (oldestOplogEntryOpTime) {
serverTransactionsMetrics->removeActiveOpTime(*oldestOplogEntryOpTime);
}
}
void TransactionMetricsObserver::_onAbortActive(
ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource* tickSource,
boost::optional<repl::OpTime> oldestOplogEntryOpTime,
Top* top) {
auto curTick = tickSource->getTicks();
invariant(_singleTransactionStats.isActive());
_onAbort(serverTransactionsMetrics, curTick, tickSource, top);
//
// Per transaction metrics.
//
_singleTransactionStats.setInactive(tickSource, curTick);
//
// Server wide transactions metrics.
//
serverTransactionsMetrics->decrementCurrentActive();
if (_singleTransactionStats.isPrepared()) {
serverTransactionsMetrics->incrementTotalPreparedThenAborted();
serverTransactionsMetrics->decrementCurrentPrepared();
}
// Remove this transaction's oldest oplog entry OpTime if one was written.
if (oldestOplogEntryOpTime) {
serverTransactionsMetrics->removeActiveOpTime(*oldestOplogEntryOpTime);
}
}
void TransactionMetricsObserver::_onAbortInactive(
ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource* tickSource,
boost::optional<repl::OpTime> oldestOplogEntryOpTime,
Top* top) {
auto curTick = tickSource->getTicks();
invariant(!_singleTransactionStats.isActive());
invariant(!_singleTransactionStats.isPrepared());
_onAbort(serverTransactionsMetrics, curTick, tickSource, top);
//
// Server wide transactions metrics.
//
serverTransactionsMetrics->decrementCurrentInactive();
// Remove this transaction's oldest oplog entry OpTime if one was written.
if (oldestOplogEntryOpTime) {
serverTransactionsMetrics->removeActiveOpTime(*oldestOplogEntryOpTime);
}
}
void TransactionMetricsObserver::onAbort(ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource* tickSource,
boost::optional<repl::OpTime> oldestOplogEntryOpTime,
Top* top) {
if (_singleTransactionStats.isActive()) {
_onAbortActive(serverTransactionsMetrics, tickSource, oldestOplogEntryOpTime, top);
} else {
_onAbortInactive(serverTransactionsMetrics, tickSource, oldestOplogEntryOpTime, top);
}
}
void TransactionMetricsObserver::onTransactionOperation(OperationContext* opCtx,
OpDebug::AdditiveMetrics additiveMetrics,
bool isPrepared) {
// Add the latest operation stats to the aggregate OpDebug::AdditiveMetrics object stored in the
// SingleTransactionStats instance on the TransactionMetricsObserver.
_singleTransactionStats.getOpDebug()->additiveMetrics.add(additiveMetrics);
// If there are valid storage statistics for this operation, put those in the
// SingleTransactionStats instance either by creating a new storageStats instance or by adding
// into an existing storageStats instance stored in SingleTransactionStats.
// WiredTiger doesn't let storage statistics be collected when transaction is prepared.
if (!isPrepared) {
std::shared_ptr<StorageStats> storageStats =
opCtx->recoveryUnit()->getOperationStatistics();
if (storageStats) {
CurOp::get(opCtx)->debug().storageStats = storageStats;
if (!_singleTransactionStats.getOpDebug()->storageStats) {
_singleTransactionStats.getOpDebug()->storageStats = storageStats->getCopy();
} else {
*_singleTransactionStats.getOpDebug()->storageStats += *storageStats;
}
}
}
// Update the LastClientInfo object stored in the SingleTransactionStats instance on the
// TransactionMetricsObserver with this Client's information. This is the last client that ran a
// transaction operation on the txnParticipant.
_singleTransactionStats.updateLastClientInfo(opCtx->getClient());
}
void TransactionMetricsObserver::_onAbort(ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource::Tick curTick,
TickSource* tickSource,
Top* top) {
//
// Per transaction metrics.
//
_singleTransactionStats.setEndTime(curTick);
//
// Server wide transactions metrics.
//
serverTransactionsMetrics->incrementTotalAborted();
serverTransactionsMetrics->decrementCurrentOpen();
auto latency =
durationCount<Microseconds>(_singleTransactionStats.getDuration(tickSource, curTick));
top->incrementGlobalTransactionLatencyStats(static_cast<uint64_t>(latency));
}
void TransactionMetricsObserver::onPrepare(ServerTransactionsMetrics* serverTransactionsMetrics,
repl::OpTime prepareOpTime,
TickSource::Tick curTick) {
//
// Per transaction metrics.
//
_singleTransactionStats.setPreparedStartTime(curTick);
// Since we currently only write an oplog entry for an in progress transaction when it is in
// the prepare state, the prepareOpTime is currently the oldest optime written to the
// oplog for this transaction.
serverTransactionsMetrics->addActiveOpTime(prepareOpTime);
serverTransactionsMetrics->incrementCurrentPrepared();
serverTransactionsMetrics->incrementTotalPrepared();
}
} // namespace mongo
|