Drizzled Public API Documentation

statistics_variables.h
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
3  *
4  * Copyright (C) 2008 Sun Microsystems, Inc.
5  * Copyright (C) 2010 Joseph Daly
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; version 2 of the License.
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 namespace drizzled {
24 
25 extern struct global_counters current_global_counters;
26 
27 /*
28  * These statistics are global and are not per session
29  * they are not reset once initialized.
30  */
31 typedef struct global_counters
32 {
33  uint64_t max_used_connections;
34  uint64_t connections;
35  uint64_t locks_immediate;
36  uint64_t locks_waited;
38 
39 /*
40  * These statistics are per session and are reset at the end
41  * of each session, after being copied into a global
42  * system_status_var
43  */
44 typedef struct system_status_var
45 {
46  uint64_t aborted_connects;
47  uint64_t aborted_threads;
48  uint64_t access_denied;
49  uint64_t bytes_received;
50  uint64_t bytes_sent;
51  uint64_t com_other;
52  uint64_t created_tmp_disk_tables;
53  uint64_t created_tmp_tables;
54  uint64_t ha_commit_count;
55  uint64_t ha_delete_count;
56  uint64_t ha_read_first_count;
57  uint64_t ha_read_last_count;
58  uint64_t ha_read_key_count;
59  uint64_t ha_read_next_count;
60  uint64_t ha_read_prev_count;
61  uint64_t ha_read_rnd_count;
62  uint64_t ha_read_rnd_next_count;
63  uint64_t ha_rollback_count;
64  uint64_t ha_update_count;
65  uint64_t ha_write_count;
66  uint64_t ha_prepare_count;
67  uint64_t ha_savepoint_count;
68  uint64_t ha_savepoint_rollback_count;
69 
70  uint64_t select_full_join_count;
71  uint64_t select_full_range_join_count;
72  uint64_t select_range_count;
73  uint64_t select_range_check_count;
74  uint64_t select_scan_count;
75  uint64_t long_query_count;
76  uint64_t filesort_merge_passes;
77  uint64_t filesort_range_count;
78  uint64_t filesort_rows;
79  uint64_t filesort_scan_count;
80  uint64_t connection_time;
81  uint64_t execution_time_nsec;
82  uint64_t updated_row_count;
83  uint64_t deleted_row_count;
84  uint64_t inserted_row_count;
85  /*
86  Number of statements sent from the client
87  */
88  uint64_t questions;
89  /*
90  IMPORTANT!
91  SEE last_system_status_var DEFINITION BELOW.
92 
93  Below 'last_system_status_var' are all variables which doesn't make any
94  sense to add to the /global/ status variable counter.
95  */
96  double last_query_cost;
98 
99 #define last_system_status_var questions
100 
101 } /* namespace drizzled */
102