forked from percona/pg_stat_monitor
-
Notifications
You must be signed in to change notification settings - Fork 0
/
guc.c
317 lines (291 loc) · 10.4 KB
/
guc.c
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
/*-------------------------------------------------------------------------
*
* guc.c
* guc variable handling of pg_stat_monitor
*
* Portions Copyright © 2018-2024, Percona LLC and/or its affiliates
*
* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
*
* Portions Copyright (c) 1994, The Regents of the University of California
*
* IDENTIFICATION
* contrib/pg_stat_monitor/guc.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "pg_stat_monitor.h"
/* GUC variables */
int pgsm_max;
int pgsm_query_max_len;
int pgsm_bucket_time;
int pgsm_max_buckets;
int pgsm_histogram_buckets;
double pgsm_histogram_min;
double pgsm_histogram_max;
int pgsm_query_shared_buffer;
bool pgsm_track_planning;
bool pgsm_extract_comments;
bool pgsm_enable_query_plan;
bool pgsm_enable_overflow;
bool pgsm_normalized_query;
bool pgsm_track_utility;
bool pgsm_track_application_names;
bool pgsm_enable_pgsm_query_id;
int pgsm_track;
static int pgsm_overflow_target; /* Not used since 2.0 */
/* Check hooks to ensure histogram_min < histogram_max */
static bool check_histogram_min(double *newval, void **extra, GucSource source);
static bool check_histogram_max(double *newval, void **extra, GucSource source);
static bool check_overflow_targer(int *newval, void **extra, GucSource source);
/*
* Define (or redefine) custom GUC variables.
*/
void
init_guc(void)
{
pgsm_track = PGSM_TRACK_TOP;
DefineCustomIntVariable("pg_stat_monitor.pgsm_max", /* name */
"Sets the maximum size of shared memory in (MB) used for statement's metadata tracked by pg_stat_monitor.", /* short_desc */
NULL, /* long_desc */
&pgsm_max, /* value address */
256, /* boot value */
10, /* min value */
10240, /* max value */
PGC_POSTMASTER, /* context */
GUC_UNIT_MB, /* flags */
NULL, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
DefineCustomIntVariable("pg_stat_monitor.pgsm_query_max_len", /* name */
"Sets the maximum length of query.", /* short_desc */
NULL, /* long_desc */
&pgsm_query_max_len, /* value address */
2048, /* boot value */
1024, /* min value */
INT_MAX, /* max value */
PGC_POSTMASTER, /* context */
0, /* flags */
NULL, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
DefineCustomIntVariable("pg_stat_monitor.pgsm_max_buckets", /* name */
"Sets the maximum number of buckets.", /* short_desc */
NULL, /* long_desc */
&pgsm_max_buckets, /* value address */
10, /* boot value */
1, /* min value */
20000, /* max value */
PGC_POSTMASTER, /* context */
0, /* flags */
NULL, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
DefineCustomIntVariable("pg_stat_monitor.pgsm_bucket_time", /* name */
"Sets the time in seconds per bucket.", /* short_desc */
NULL, /* long_desc */
&pgsm_bucket_time, /* value address */
60, /* boot value */
1, /* min value */
INT_MAX, /* max value */
PGC_POSTMASTER, /* context */
GUC_UNIT_S, /* flags */
NULL, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
DefineCustomRealVariable("pg_stat_monitor.pgsm_histogram_min", /* name */
"Sets the time in millisecond.", /* short_desc */
NULL, /* long_desc */
&pgsm_histogram_min, /* value address */
1, /* boot value */
0, /* min value */
HISTOGRAM_MAX_TIME, /* max value */
PGC_POSTMASTER, /* context */
GUC_UNIT_MS, /* flags */
check_histogram_min, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
DefineCustomRealVariable("pg_stat_monitor.pgsm_histogram_max", /* name */
"Sets the time in millisecond.", /* short_desc */
NULL, /* long_desc */
&pgsm_histogram_max, /* value address */
100000.0, /* boot value */
10.0, /* min value */
HISTOGRAM_MAX_TIME, /* max value */
PGC_POSTMASTER, /* context */
GUC_UNIT_MS, /* flags */
check_histogram_max, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
DefineCustomIntVariable("pg_stat_monitor.pgsm_histogram_buckets", /* name */
"Sets the maximum number of histogram buckets.", /* short_desc */
NULL, /* long_desc */
&pgsm_histogram_buckets, /* value address */
20, /* boot value */
2, /* min value */
MAX_RESPONSE_BUCKET, /* max value */
PGC_POSTMASTER, /* context */
0, /* flags */
NULL, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
DefineCustomIntVariable("pg_stat_monitor.pgsm_query_shared_buffer", /* name */
"Sets the maximum size of shared memory in (MB) used for query tracked by pg_stat_monitor.", /* short_desc */
NULL, /* long_desc */
&pgsm_query_shared_buffer, /* value address */
20, /* boot value */
1, /* min value */
10000, /* max value */
PGC_POSTMASTER, /* context */
GUC_UNIT_MB, /* flags */
NULL, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
/* deprecated in V 2.0 */
DefineCustomIntVariable("pg_stat_monitor.pgsm_overflow_target", /* name */
"Sets the overflow target for pg_stat_monitor. (Deprecated, use pgsm_enable_overflow)", /* short_desc */
NULL, /* long_desc */
&pgsm_overflow_target, /* value address */
1, /* boot value */
0, /* min value */
1, /* max value */
PGC_POSTMASTER, /* context */
0, /* flags */
check_overflow_targer, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
DefineCustomBoolVariable("pg_stat_monitor.pgsm_track_utility", /* name */
"Selects whether utility commands are tracked.", /* short_desc */
NULL, /* long_desc */
&pgsm_track_utility, /* value address */
true, /* boot value */
PGC_USERSET, /* context */
0, /* flags */
NULL, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
DefineCustomBoolVariable("pg_stat_monitor.pgsm_track_application_names", /* name */
"Enable/Disable application names tracking.", /* short_desc */
NULL, /* long_desc */
&pgsm_track_application_names, /* value address */
true, /* boot value */
PGC_USERSET, /* context */
0, /* flags */
NULL, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
DefineCustomBoolVariable("pg_stat_monitor.pgsm_enable_pgsm_query_id", /* name */
"Enable/disable PGSM specific query id calculation which is very useful in comparing same query across databases and clusters..", /* short_desc */
NULL, /* long_desc */
&pgsm_enable_pgsm_query_id, /* value address */
true, /* boot value */
PGC_USERSET, /* context */
0, /* flags */
NULL, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
DefineCustomBoolVariable("pg_stat_monitor.pgsm_normalized_query", /* name */
"Selects whether save query in normalized format.", /* short_desc */
NULL, /* long_desc */
&pgsm_normalized_query, /* value address */
false, /* boot value */
PGC_USERSET, /* context */
0, /* flags */
NULL, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
DefineCustomBoolVariable("pg_stat_monitor.pgsm_enable_overflow", /* name */
"Enable/Disable pg_stat_monitor to grow beyond shared memory into swap space.", /* short_desc */
NULL, /* long_desc */
&pgsm_enable_overflow, /* value address */
true, /* boot value */
PGC_POSTMASTER, /* context */
0, /* flags */
NULL, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
DefineCustomBoolVariable("pg_stat_monitor.pgsm_enable_query_plan", /* name */
"Enable/Disable query plan monitoring.", /* short_desc */
NULL, /* long_desc */
&pgsm_enable_query_plan, /* value address */
false, /* boot value */
PGC_USERSET, /* context */
0, /* flags */
NULL, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
DefineCustomBoolVariable("pg_stat_monitor.pgsm_extract_comments", /* name */
"Enable/Disable extracting comments from queries.", /* short_desc */
NULL, /* long_desc */
&pgsm_extract_comments, /* value address */
false, /* boot value */
PGC_USERSET, /* context */
0, /* flags */
NULL, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
DefineCustomEnumVariable("pg_stat_monitor.pgsm_track", /* name */
"Selects which statements are tracked by pg_stat_monitor.", /* short_desc */
NULL, /* long_desc */
&pgsm_track, /* value address */
PGSM_TRACK_TOP, /* boot value */
track_options, /* enum options */
PGC_USERSET, /* context */
0, /* flags */
NULL, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
#if PG_VERSION_NUM >= 130000
DefineCustomBoolVariable("pg_stat_monitor.pgsm_track_planning", /* name */
"Selects whether planning statistics are tracked.", /* short_desc */
NULL, /* long_desc */
&pgsm_track_planning, /* value address */
false, /* boot value */
PGC_USERSET, /* context */
0, /* flags */
NULL, /* check_hook */
NULL, /* assign_hook */
NULL /* show_hook */
);
#endif
}
/* Maximum value must be greater or equal to minimum + 1.0 */
static bool
check_histogram_min(double *newval, void **extra, GucSource source)
{
/*
* During module initialization PGSM_HISTOGRAM_MIN is initialized before
* PGSM_HISTOGRAM_MAX, in this case PGSM_HISTOGRAM_MAX will be zero.
*/
return (pgsm_histogram_max == 0 || (*newval + 1.0) <= pgsm_histogram_max);
}
static bool
check_histogram_max(double *newval, void **extra, GucSource source)
{
return (*newval >= (pgsm_histogram_min + 1.0));
}
static bool
check_overflow_targer(int *newval, void **extra, GucSource source)
{
if (source != PGC_S_DEFAULT)
elog(WARNING, "pg_stat_monitor.pgsm_overflow_target is deprecated, use pgsm_enable_overflow");
return true;
}