Reports information about how many pages have been read from each table.
|Column name||Data type||Description|
|table_id||INT||The table ID.|
|creator||CHAR(128)||The user name of the table's creator.|
|table_name||CHAR(128)||The table name.|
|count||UNSIGNED BIGINT||The estimated number of rows in the table, taken from SYSTAB.|
|table_page_count||UNSIGNED BIGINT||The number of main pages used by the table.|
|table_page_cached||UNSIGNED BIGINT||The number of tables pages currently stored in the cache.|
|table_page_reads||UNSIGNED BIGINT||The number of page reads performed for pages in the main table.|
|ext_page_count||UNSIGNED BIGINT||The estimated number of pages in the table|
|ext_page_cached||UNSIGNED BIGINT||Reserved for future use.|
|ext_page_reads||UNSIGNED BIGINT||Reserved for future use.|
Each row returned by the sa_table_stats procedure describes a table for which the optimizer is maintaining page statistics. The sa_table_stats procedure can be used to find which tables are using cache memory and how many disk reads are being performed for each table. For example, you can use the sa_table_stats procedure to find the table that is generating the most disk reads. The results of the procedure represent estimates and should be used only for diagnostic purposes.
The table_page_cached column indicates how many pages of the table are currently stored in the cache, and the table_page_reads column indicates how many table pages have been read from disk since the optimizer started maintaining counts for the table. These statistics are not stored persistently within the database; they represent the activity on tables after they are loaded into memory for the first time.
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