a bit reworked structure; rarely used indexes

Author: NikolayS

README.md

@@ -11,7 +11,7 @@ psql
 
 In psql, type:
 ```
-\i index.psql
+\i start.psql
 ```
 
 – it will open interactive menu.

index.psql

@@ -0,0 +1,21 @@
+--https://github.com/dataegret/pg-utils/tree/master/sql
+
+SELECT
+        pg_stat_user_indexes.schemaname||'.'||pg_stat_user_indexes.relname as tablename,
+        indexrelname,
+        pg_stat_user_indexes.idx_scan,
+        (coalesce(n_tup_ins,0)+coalesce(n_tup_upd,0)-coalesce(n_tup_hot_upd,0)+coalesce(n_tup_del,0)) as write_activity,
+        pg_stat_user_tables.seq_scan,
+        pg_stat_user_tables.n_live_tup,
+	pg_size_pretty(pg_relation_size(pg_index.indexrelid::regclass)) as size
+from pg_stat_user_indexes
+join pg_stat_user_tables
+        on pg_stat_user_indexes.relid=pg_stat_user_tables.relid
+join pg_index
+        ON pg_index.indexrelid=pg_stat_user_indexes.indexrelid
+where
+        pg_index.indisunique is false
+        and pg_stat_user_indexes.idx_scan::float/(coalesce(n_tup_ins,0)+coalesce(n_tup_upd,0)-coalesce(n_tup_hot_upd,0)+coalesce(n_tup_del,0)+1)::float<0.01
+        and (coalesce(n_tup_ins,0)+coalesce(n_tup_upd,0)-coalesce(n_tup_hot_upd,0)+coalesce(n_tup_del,0))>10000
+order by 4 desc,1,2;
+

indexes/rare.sql

@@ -0,0 +1,46 @@
+\echo Menu:
+\echo '  1 – Basic Node Information (master/replica, lag, DB size, tmp files)'
+\echo '  2 – '
+\echo '  3 - Slowest Queries'
+\echo '  i1 - Unused/Redundant Indexes'
+\echo '  i2 - Rarely Used Indexes'
+\echo '  q – Quit from this tool'
+\echo
+\echo 'Type your choice and press <Enter>:'
+\prompt d_step_unq
+\set d_stp '\'' :d_step_unq '\''
+select
+  :d_stp::text = '1' as d_step_is_1,
+  :d_stp::text = '2' as d_step_is_2,
+  :d_stp::text = '3' as d_step_is_3,
+  :d_stp::text = 'i1' as d_step_is_i1,
+  :d_stp::text = 'i2' as d_step_is_i2,
+  :d_stp::text = 'q' as d_step_is_q \gset
+\if :d_step_is_1
+  \i ./general/basic.sql
+  \prompt 'Press <Enter> to continue…' d_dummy
+  \i ./start.psql
+\elif :d_step_is_2
+  \echo '      2 is chosen!'
+  \prompt 'Press <Enter> to continue…' d_dummy
+  \i ./start.psql
+\elif :d_step_is_3
+  \echo '      3 is chosen!'
+  \prompt 'Press <Enter> to continue…' d_dummy
+  \i ./start.psql
+\elif :d_step_is_i1
+  \i ./indexes/redundant.sql
+  \prompt 'Press <Enter> to continue…' d_dummy
+  \i ./start.psql
+\elif :d_step_is_i2
+  \i ./indexes/rare.sql
+  \prompt 'Press <Enter> to continue…' d_dummy
+  \i ./start.psql
+\elif :d_step_is_q
+  \echo 'Bye!'
+  \echo
+\else
+  \echo 'ERROR: Unkown option!'
+  \i ./start.psql
+\endif
+