PG_STATIO_ALL_INDEXES

PG_STATIO_ALL_INDEXES contains one row for each index in the current database, showing I/O statistics about accesses to that specific index.

Table 1 PG_STATIO_ALL_INDEXES columns

Name	Type	Description
relid	oid	OID of the table for this index
indexrelid	oid	OID of the index
schemaname	name	Name of the schema that the index is in
relname	name	Name of the table that the index is created for
indexrelname	name	Index name
idx_blks_read	bigint	Number of disk blocks read from the index
idx_blks_hit	bigint	Number of cache hits in the index