Help Center/ GaussDB/ Distributed_8.x/ Schemas/ DBE_PERF Schema/ Cache and I/O/ GLOBAL_STATIO_SYS_TABLES

Updated on 2024-06-03 GMT+08:00

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GLOBAL_STATIO_SYS_TABLES

GLOBAL_STATIO_SYS_TABLES displays I/O status information about all system catalogs in namespaces on each node, as described in Table 1.

**Table 1** GLOBAL_STATIO_SYS_TABLES columns
Name	Type	Description
node_name	name	Node name.
relid	oid	Table OID.
schemaname	name	Name of the schema that contains the table.
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 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 TOAST tables (if any) in the table.
toast_blks_hit	bigint	Number of buffer hits in TOAST tables (if any) in the table.
tidx_blks_read	bigint	Number of disk blocks read from the TOAST tables index (if any) in the table.
tidx_blks_hit	bigint	Number of buffer-hits in the TOAST table index (if any) in the table.