SUMMARY_STATIO_SYS_TABLES

SUMMARY_STATIO_SYS_TABLES displays a summary of I/O status information about system catalogs of each node in the database, as described in Table 1.

**Table 1** SUMMARY_STATIO_SYS_TABLES columns
Name	Type	Description
schemaname	name	Name of the schema that contains the table.
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 the TOAST table (if any) in the table.
toast_blks_hit	numeric	Number of buffer hits in the TOAST table (if any) in the table.
tidx_blks_read	numeric	Number of disk blocks read from the TOAST table index (if any) in the table.
tidx_blks_hit	numeric	Number of buffer-hits in the TOAST table index (if any) in the table.