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
|
;;; Guix Data Service -- Information about Guix over time
;;; Copyright © 2020 Christopher Baines <mail@cbaines.net>
;;;
;;; This program is free software: you can redistribute it and/or
;;; modify it under the terms of the GNU Affero General Public License
;;; as published by the Free Software Foundation, either version 3 of
;;; the License, or (at your option) any later version.
;;;
;;; This program is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; Affero General Public License for more details.
;;;
;;; You should have received a copy of the GNU Affero General Public
;;; License along with this program. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (guix-data-service metrics)
#:use-module (ice-9 match)
#:use-module (squee)
#:export (fetch-high-level-table-size-metrics
fetch-pg-stat-user-tables-metrics
fetch-pg-stat-user-indexes-metrics))
(define (fetch-high-level-table-size-metrics conn)
;; Adapted from https://wiki.postgresql.org/wiki/Disk_Usage
(define query
"
WITH RECURSIVE pg_inherit(inhrelid, inhparent) AS (
SELECT inhrelid, inhparent
FROM pg_inherits
UNION
SELECT child.inhrelid, parent.inhparent
FROM pg_inherit child, pg_inherits parent
WHERE child.inhparent = parent.inhrelid
), pg_inherit_short AS (
SELECT *
FROM pg_inherit
WHERE inhparent NOT IN (SELECT inhrelid FROM pg_inherit)
)
SELECT table_name,
COALESCE(pg_tablespace.spcname,'default') AS tablespace,
row_estimate,
table_bytes,
toast_bytes
FROM (
SELECT *, total_bytes-index_bytes-COALESCE(toast_bytes,0) AS table_bytes
FROM (
SELECT c.oid,
nspname AS table_schema,
relname AS table_name,
reltablespace AS tablespace_id,
SUM(c.reltuples) OVER (partition BY parent) AS row_estimate,
SUM(pg_total_relation_size(c.oid)) OVER (partition BY parent) AS total_bytes,
SUM(pg_indexes_size(c.oid)) OVER (partition BY parent) AS index_bytes,
SUM(pg_total_relation_size(reltoastrelid)) OVER (partition BY parent) AS toast_bytes,
parent
FROM (
SELECT pg_class.oid,
reltuples,
relname,
relnamespace,
reltablespace,
pg_class.reltoastrelid,
COALESCE(inhparent, pg_class.oid) parent
FROM pg_class
LEFT JOIN pg_inherit_short ON inhrelid = oid
WHERE relkind IN ('r', 'p')
) c
LEFT JOIN pg_namespace n ON n.oid = c.relnamespace
) a
WHERE oid = parent
AND table_schema = 'guix_data_service'
) a
LEFT JOIN pg_tablespace ON tablespace_id = pg_tablespace.oid")
(map (match-lambda
((name tablespace row-estimate table-bytes toast-bytes)
(list name
tablespace
(or (string->number row-estimate) 0)
(or (string->number table-bytes) 0)
(or (string->number toast-bytes) 0))))
(exec-query conn query)))
(define (fetch-pg-stat-user-tables-metrics conn)
(define query
"
SELECT relname, seq_scan, seq_tup_read,
COALESCE(idx_scan, 0), COALESCE(idx_tup_fetch, 0),
n_tup_ins, n_tup_upd, n_tup_del, n_tup_hot_upd,
n_live_tup, n_dead_tup, n_mod_since_analyze,
COALESCE(extract(epoch from last_vacuum), 0),
COALESCE(extract(epoch from last_autovacuum), 0),
COALESCE(extract(epoch from last_analyze), 0),
COALESCE(extract(epoch from last_autoanalyze), 0),
vacuum_count, autovacuum_count, analyze_count, autoanalyze_count
FROM pg_stat_user_tables")
(map (match-lambda
((relname seq-scan seq-tup-read
idx-scan idx-tup-fetch
n-tup-ins n-tup-upd n-tup-del n-tup-hot-upd
n-live-tup n-dead-tup n-mod-since-analyze
last-vacuum last-autovacuum last-analyze last-autoanalyze
vacuum-count autovacuum-count analyze-count autoanalyze-count)
`((name . ,relname)
(seq-scan . ,seq-scan)
(seq-tup-read . ,seq-tup-read)
(idx-scan . ,idx-scan)
(idx-tup-fetch . ,idx-tup-fetch)
(n-tup-ins . ,n-tup-ins)
(n-tup-upd . ,n-tup-upd)
(n-tup-del . ,n-tup-del)
(n-tup-hot-upd . ,n-tup-hot-upd)
(n-live-tup . ,n-live-tup)
(n-dead-tup . ,n-dead-tup)
(n-mod-since-analyze . ,n-mod-since-analyze)
(last-vacuum . ,last-vacuum)
(last-autovacuum . ,last-autovacuum)
(last-analyze . ,last-analyze)
(last-autoanalyze . ,last-autoanalyze)
(vacuum-count . ,vacuum-count)
(autovacuum-count . ,autovacuum-count)
(analyze-count . ,analyze-count)
(autoanalyze-count . ,autoanalyze-count))))
(exec-query conn query)))
(define (fetch-pg-stat-user-indexes-metrics conn)
(define query
"
SELECT pg_indexes.indexname,
pg_indexes.tablename,
COALESCE(pg_indexes.tablespace,'default') AS tablespace,
pg_stat_user_indexes.idx_scan,
pg_stat_user_indexes.idx_tup_read,
pg_stat_user_indexes.idx_tup_fetch,
pg_relation_size(indexrelid) AS size_in_bytes
FROM pg_stat_user_indexes
LEFT JOIN pg_indexes
ON pg_stat_user_indexes.indexrelname = pg_indexes.indexname
AND pg_stat_user_indexes.schemaname = pg_indexes.schemaname
WHERE pg_stat_user_indexes.schemaname = 'guix_data_service'")
(map
(match-lambda
((indexname tablename tablespace
idx_scan idx_tup_read idx_tup_fetch
size_in_bytes)
`((name . ,indexname)
(table-name . ,tablename)
(tablespace . ,tablespace)
(idx-scan . ,idx_scan)
(idx-tup-read . ,idx_tup_read)
(idx-tup-fetch . ,idx_tup_fetch)
(bytes . ,size_in_bytes))))
(exec-query conn query)))
|