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
|
# -*- ruby -*-
# vim: set noet nosta sw=4 ts=4 :
#
# Quickly dump size information for a given database.
# Top twenty objects, and size per schema.
#
# Mahlon E. Smith <mahlon@martini.nu>
#
# Based on work by Jeff Davis <ruby@j-davis.com>.
#
require 'ostruct'
require 'optparse'
require 'etc'
require 'pg'
SCRIPT_VERSION = %q$Id$
### Gather data and output it to $stdout.
###
def report( opts )
db = PG.connect(
:dbname => opts.database,
:host => opts.host,
:port => opts.port,
:user => opts.user,
:password => opts.pass,
:sslmode => 'prefer'
)
# -----------------------------------------
db_info = db.exec %Q{
SELECT
count(oid) AS num_relations,
pg_size_pretty(pg_database_size('#{opts.database}')) AS dbsize
FROM
pg_class
}
puts '=' * 70
puts "Disk usage information for %s: (%d relations, %s total)" % [
opts.database,
db_info[0]['num_relations'],
db_info[0]['dbsize']
]
puts '=' * 70
# -----------------------------------------
top_twenty = db.exec %q{
SELECT
relname AS name,
relkind AS kind,
pg_size_pretty(pg_relation_size(pg_class.oid)) AS size
FROM
pg_class
ORDER BY
pg_relation_size(pg_class.oid) DESC
LIMIT 20
}
puts 'Top twenty objects by size:'
puts '-' * 70
top_twenty.each do |row|
type = case row['kind']
when 'i'; 'index'
when 't'; 'toast'
when 'r'; 'table'
when 'S'; 'sequence'
else; '???'
end
puts "%40s %10s (%s)" % [ row['name'], row['size'], type ]
end
puts '-' * 70
# -----------------------------------------
schema_sizes = db.exec %q{
SELECT
table_schema,
pg_size_pretty( CAST( SUM(pg_total_relation_size(table_schema || '.' || table_name)) AS bigint)) AS size
FROM
information_schema.tables
GROUP BY
table_schema
ORDER BY
CAST( SUM(pg_total_relation_size(table_schema || '.' || table_name)) AS bigint ) DESC
}
puts 'Size per schema:'
puts '-' * 70
schema_sizes.each do |row|
puts "%20s %10s" % [ row['table_schema'], row['size'] ]
end
puts '-' * 70
puts
db.finish
end
### Parse command line arguments. Return a struct of global options.
###
def parse_args( args )
options = OpenStruct.new
options.database = Etc.getpwuid( Process.uid ).name
options.host = '127.0.0.1'
options.port = 5432
options.user = Etc.getpwuid( Process.uid ).name
options.sslmode = 'prefer'
options.interval = 5
opts = OptionParser.new do |opts|
opts.banner = "Usage: #{$0} [options]"
opts.separator ''
opts.separator 'Connection options:'
opts.on( '-d', '--database DBNAME',
"specify the database to connect to (default: \"#{options.database}\")" ) do |db|
options.database = db
end
opts.on( '-h', '--host HOSTNAME', 'database server host' ) do |host|
options.host = host
end
opts.on( '-p', '--port PORT', Integer,
"database server port (default: \"#{options.port}\")" ) do |port|
options.port = port
end
opts.on( '-U', '--user NAME',
"database user name (default: \"#{options.user}\")" ) do |user|
options.user = user
end
opts.on( '-W', 'force password prompt' ) do |pw|
print 'Password: '
begin
system 'stty -echo'
options.pass = gets.chomp
ensure
system 'stty echo'
puts
end
end
opts.separator ''
opts.separator 'Other options:'
opts.on_tail( '--help', 'show this help, then exit' ) do
$stderr.puts opts
exit
end
opts.on_tail( '--version', 'output version information, then exit' ) do
puts SCRIPT_VERSION
exit
end
end
opts.parse!( args )
return options
end
if __FILE__ == $0
opts = parse_args( ARGV )
report( opts )
end
|
