PG_STATIO_ALL_TABLES

PG_STATIO_ALL_TABLES contains I/O statistics for each table (including the TOAST table) in the current database.

Table 1 PG_STATIO_ALL_TABLES columns

Name	Type	Description
relid	oid	Table OID
schemaname	name	Name of the schema that the table is in
relname	name	Table name
heap_blks_read	bigint	Number of disk blocks read from the table
heap_blks_hit	bigint	Number of cache hits in the table
idx_blks_read	bigint	Number of disk blocks read from all indexes in the table
idx_blks_hit	bigint	Number of cache hits in indexes in the table
toast_blks_read	bigint	Number of disk blocks read from the TOAST table (if any) in the table
toast_blks_hit	bigint	Number of buffer hits in the TOAST table (if any) in the table
tidx_blks_read	bigint	Number of disk blocks read from the TOAST table index (if any) in the table
tidx_blks_hit	bigint	Number of buffer-hits in the TOAST table index (if any) in the table