SUMMARY_STATIO_SYS_TABLES

SUMMARY_STATIO_SYS_TABLES displays I/O status information about all system catalogs in namespaces in the cluster.

**Table 1** SUMMARY_STATIO_SYS_TABLES columns
Name	Type	Description
schemaname	name	Name of the schema that the table is in
relname	name	Table name
heap_blks_read	numeric	Number of disk blocks read from the table
heap_blks_hit	numeric	Number of cache hits in the table
idx_blks_read	numeric	Number of disk blocks read from indexes in the table
idx_blks_hit	numeric	Number of cache hits in indexes in the table
toast_blks_read	numeric	Number of disk blocks read from TOAST tables (if any) in the table
toast_blks_hit	numeric	Number of buffer hits in TOAST tables (if any) in the table
tidx_blks_read	numeric	Number of disk blocks read from the TOAST tables index (if any) in the table
tidx_blks_hit	numeric	Number of buffer hits in the TOAST table index (if any) in the table