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1 perry 1 DB_STAT
2 !!!DB_STAT
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 ENVIRONMENT VARIABLES
7 SEE ALSO
8 ----
9 !!NAME
10
11
12 db_stat - display DB statistics
13 !!SYNOPSIS
14
15
16 __db_stat__ [[__-clmNt__]
17
18
19 [[__-C Acfhlmo__] [[__-d file__] [[__-h home__] [[__-M
20 Ahlm__]
21 !!DESCRIPTION
22
23
24 The ''db_stat'' utility displays statistics for DB
25 environments.
26
27
28 The options are as follows:
29
30
31 __-C__
32
33
34 Display internal information about the lock region. (The
35 output from this option is often both voluminous and
36 meaningless, and is intended only for
37 debugging.)
38
39
40 __-A__
41
42
43 Display all information.
44
45
46 __-c__
47
48
49 Display lock conflict matrix.
50
51
52 __-f__
53
54
55 Display lock and object free lists.
56
57
58 __-l__
59
60
61 Display lockers within hash chains.
62
63
64 __-m__
65
66
67 Display region memory information.
68
69
70 __-o__
71
72
73 Display objects within hash chains.
74
75
76 __-c__
77
78
79 Display lock region statistics as described in
80 ''db_lock''(3).
81
82
83 __-d__
84
85
86 Display database statistics for the specified database as
87 described in ''db_open''(3).
88
89
90 __-h__
91
92
93 Specify a home directory for the database.
94
95
96 __-l__
97
98
99 Display log region statistics as described in
100 ''db_log''(3).
101
102
103 __-M__
104
105
106 Display internal information about the shared memory buffer
107 pool. (The output from this option is often both voluminous
108 and meaningless, and is intended only for
109 debugging.)
110
111
112 __-A__
113
114
115 Display all information.
116
117
118 __-h__
119
120
121 Display buffers within hash chains.
122
123
124 __-l__
125
126
127 Display buffers within LRU chains.
128
129
130 __-m__
131
132
133 Display region memory information.
134
135
136 __-m__
137
138
139 Display shared memory buffer pool statistics as described in
140 ''db_mpool''(3).
141
142
143 __-N__
144
145
146 Don't acquire locks while displaying the statistics. This
147 option is intended only for debugging corrupt regions and
148 should not be used under any other
149 circumstances.
150
151
152 __-t__
153
154
155 Display transaction region statistics as described in
156 ''db_txn''(3).
157
158
159 The ''db_stat'' utility attaches to DB shared memory
160 regions. In order to avoid region corruption, it should
161 always be given the chance to detach and exit gracefully. To
162 cause ''db_stat'' to clean up after itself and exit, send
163 it an interrupt signal (SIGINT).
164
165
166 Values smaller than 10 million are generally displayed
167 without any special notation. Values larger than 10 million
168 are normally displayed as ``
169
170
171 The ''db_stat'' utility exits 0 on success, and
172 ''
173 !!ENVIRONMENT VARIABLES
174
175
176 The following environment variables affect the execution of
177 ''db_stat'':
178
179
180 DB_HOME
181
182
183 If the __-h__ option is not specified and the environment
184 variable ''DB_HOME'' is set, it is used as the path of
185 the database home, as described in
186 ''db_appinit''(3).
187 !!SEE ALSO
188
189
190 The DB library is a family of groups of functions that
191 provides a modular programming interface to transactions and
192 record-oriented file access. The library includes support
193 for transactions, locking, logging and file page caching, as
194 well as various indexed access methods. Many of the
195 functional groups (e.g., the file page caching functions)
196 are useful independent of the other DB functions, although
197 some functional groups are explicitly based on other
198 functional groups (e.g., transactions and
199 logging).
200
201
202 ''db_archive''(1), ''db_checkpoint''(1),
203 ''db_deadlock''(1), ''db_dump''(1), ''db_load''(1),
204 ''db_recover''(1), ''db_stat''(1),
205 ----
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