sfriquet

WITH constants AS (
    -- define some constants for sizes of things
    -- for reference down the query and easy maintenance
    SELECT current_setting('block_size')::numeric AS bs, 23 AS hdr, 8 AS ma
),
no_stats AS (
    -- screen out table who have attributes
    -- which dont have stats, such as JSON
    SELECT table_schema, table_name, 
        n_live_tup::numeric as est_rows,

sfriquet

-- Set number of shard
ALTER DATABASE citus SET citus.shard_count = 64;

-- Explain across all shards
SET citus.explain_all_tasks TO true;

-- Size of all distributed tables excluding indexes but including TOAST, free space map, and visibility map
SELECT logicalrelid::text tablename, pg_size_pretty(citus_table_size(logicalrelid::text)) size FROM pg_dist_partition group by tablename;
                                                                     
-- Size of all distributed tables including all indexes and TOAST data