feat(t2): add storage parameters (reloptions) query

Add new t2 query to list tables, indexes, and materialized views with
custom storage parameters (reloptions). This helps DBAs:
- Audit custom table/index settings
- Find tables with disabled autovacuum
- Identify low fillfactor settings
- See partition relationships and their individual settings

Features:
- Shows all objects with reloptions
- Includes partition hierarchy (shows parent table for partitions)
- Provides warnings for potentially problematic settings:
  - Autovacuum disabled on tables > 10 MiB
  - Low fillfactor (< 50%)
  - Aggressive autovacuum (very low scale factor)
- Sorted by size (largest first) and partition relationships

Closes #61

Author: NikolayS

sql/t2_storage_parameters.sql

@@ -0,0 +1,54 @@
+--Storage parameters (reloptions)
+
+with rel_with_options as (
+  select
+    n.nspname as schema,
+    c.relname as object_name,
+    case c.relkind
+      when 'r' then 'table'
+      when 'i' then 'index'
+      when 'm' then 'materialized view'
+      when 'p' then 'partitioned table'
+      when 'I' then 'partitioned index'
+    end as object_type,
+    pg_size_pretty(pg_relation_size(c.oid)) as size,
+    pg_relation_size(c.oid) as size_bytes,
+    c.reloptions,
+    unnest(c.reloptions) as option,
+    c.relispartition,
+    (select n2.nspname || '.' || c2.relname
+     from pg_inherits i
+     join pg_class c2 on i.inhparent = c2.oid
+     join pg_namespace n2 on c2.relnamespace = n2.oid
+     where i.inhrelid = c.oid
+    ) as parent_table
+  from pg_class c
+  join pg_namespace n on c.relnamespace = n.oid
+  where c.reloptions is not null
+    and n.nspname not in ('pg_catalog', 'information_schema')
+    and c.relname != 'pg_stats'
+)
+select
+  schema,
+  object_name,
+  object_type,
+  case
+    when relispartition then 'partition of ' || parent_table
+    else null
+  end as partition_info,
+  size,
+  option,
+  case
+    when option ~ 'autovacuum_enabled=(false|off)' and size_bytes > 10485760 then 'WARNING: autovacuum disabled on table > 10 MiB'
+    when option ~ 'autovacuum_enabled=(false|off)' then 'autovacuum disabled'
+    when option ~ 'fillfactor=([1-4][0-9]|50)' then 'low fillfactor (< 50%)'
+    when option ~ 'autovacuum_vacuum_scale_factor=0\.0*[1-9]' then 'aggressive autovacuum (low scale factor)'
+    else null
+  end as note
+from rel_with_options
+order by
+  parent_table nulls first,
+  size_bytes desc,
+  object_type,
+  schema,
+  object_name;

start.psql

@@ -24,6 +24,7 @@
 \echo '  s1 – Slowest queries, by total time (requires pg_stat_statements)'
 \echo '  s2 – Slowest queries report (requires pg_stat_statements)'
 \echo '  t1 – Postgres parameters tuning'
+\echo '  t2 – Storage parameters (reloptions)'
 \echo '  v1 – Vacuum: current activity'
 \echo '  v2 – VACUUM progress and autovacuum queue'
 \echo '   q – Quit'
@@ -56,6 +57,7 @@ select
 :d_stp::text = 's1' as d_step_is_s1,
 :d_stp::text = 's2' as d_step_is_s2,
 :d_stp::text = 't1' as d_step_is_t1,
+:d_stp::text = 't2' as d_step_is_t2,
 :d_stp::text = 'v1' as d_step_is_v1,
 :d_stp::text = 'v2' as d_step_is_v2,
 :d_stp::text = 'q' as d_step_is_q \gset
@@ -158,6 +160,10 @@ select
   \ir ./sql/t1_tuning.sql
   \prompt 'Press <Enter> to continue…' d_dummy
   \ir ./start.psql
+\elif :d_step_is_t2
+  \ir ./sql/t2_storage_parameters.sql
+  \prompt 'Press <Enter> to continue…' d_dummy
+  \ir ./start.psql
 \elif :d_step_is_v1
   \ir ./sql/v1_vacuum_activity.sql
   \prompt 'Press <Enter> to continue…' d_dummy