Drizzled Public API Documentation

query_usage.h
1 /* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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3  *
4  * Copyright (C) 2010 Brian Aker
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #pragma once
22 
23 #include <drizzled/session.h>
24 #include <drizzled/util/storable.h>
25 
26 namespace performance_dictionary {
27 
28 #define USAGE_MAX_KEPT 5
29 
30 struct query_usage {
31  std::string query;
32  struct rusage start;
33  struct rusage buffer;
34 
35  query_usage()
36  {
37  memset(&start, 0, sizeof(struct rusage));
38  memset(&buffer, 0, sizeof(struct rusage));
39  }
40 
41  void set(const std::string &sql, const struct rusage &arg)
42  {
43  if (getrusage(RUSAGE_THREAD, &buffer))
44  {
45  memset(&start, 0, sizeof(struct rusage));
46  memset(&buffer, 0, sizeof(struct rusage));
47  return;
48  }
49  query= sql.substr(0, 512);
50  start= arg;
51 
52  buffer.ru_utime.tv_sec -= start.ru_utime.tv_sec;
53  buffer.ru_utime.tv_usec -= start.ru_utime.tv_usec;
54 
55  buffer.ru_stime.tv_sec -= start.ru_stime.tv_sec;
56  buffer.ru_stime.tv_usec -= start.ru_stime.tv_usec;
57 
58  buffer.ru_maxrss -= start.ru_maxrss;
59  buffer.ru_ixrss -= start.ru_ixrss;
60  buffer.ru_idrss -= start.ru_idrss;
61  buffer.ru_isrss -= start.ru_isrss;
62  buffer.ru_minflt -= start.ru_minflt;
63  buffer.ru_majflt -= start.ru_majflt;
64  buffer.ru_nswap -= start.ru_nswap;
65  buffer.ru_inblock -= start.ru_inblock;
66  buffer.ru_oublock -= start.ru_oublock;
67  buffer.ru_msgsnd -= start.ru_msgsnd;
68  buffer.ru_msgrcv -= start.ru_msgrcv;
69  buffer.ru_nsignals -= start.ru_nsignals;
70  buffer.ru_nvcsw -= start.ru_nvcsw;
71  buffer.ru_nivcsw -= start.ru_nivcsw;
72  }
73 
74  const struct rusage &delta(void) const
75  {
76  return buffer;
77  }
78 
79  ~query_usage()
80  { }
81 };
82 
83 typedef std::list <query_usage> Query_list;
84 
86 {
87 public:
88  Query_list query_list;
89 
90  QueryUsage()
91  {
92  query_list.resize(USAGE_MAX_KEPT);
93  }
94 
95  void push(drizzled::Session::QueryString query_string, const struct rusage &arg);
96 
97  Query_list &list(void)
98  {
99  return query_list;
100  }
101 };
102 
103 
104 } /* namespace performance_dictionary */
105 
boost::shared_ptr< const std::string > QueryString
Definition: session.h:137