DB2 Version 9.7 for Linux, UNIX, and Windows

SNAPSHOT_TBS table function

Returns activity information from a table space snapshot.

Note: This table function has been deprecated and replaced by the SNAPTBSP administrative view and SNAP_GET_TBSP_V91 table function - Retrieve table space logical data group snapshot information


>>-SNAPSHOT_TBS--(--dbname--,--dbpartitionnum--)---------------><

The schema is SYSPROC.

Table function parameters

dbname: An input argument of type VARCHAR(255) that specifies a valid database name in the same instance as the currently connected database when calling this function. Specify a database name that has a directory entry type of either "Indirect" or "Home", as returned by the LIST DATABASE DIRECTORY command. Specify the null value to take the snapshot from the currently connected database.
dbpartitionnum: An input argument of type INTEGER that specifies a valid database partition number. Specify -1 for the current database partition, or -2 for all active database partitions. An active database partition is a partition where the database is available for connection and use by applications.
If the null value is specified, -1 is set implicitly.

If both parameters are set to NULL, the snapshot is taken only if a file has not previously been created by the SNAPSHOT_FILEW stored procedure for the corresponding snapshot API request type.

Authorization

One of the following authorities is required to execute the function:

EXECUTE privilege on the function
DATAACCESS authority

To access snapshot monitor data, one of the following authorities is required:

SYSMON authority
SYSCTRL authority
SYSMAINT authority
SYSADM authority

The function returns a table as shown in the following section.

Table 1. Information returned by the SNAPSHOT_TBS table function
Column name	Data type	Description or corresponding monitor element
SNAPSHOT_TIMESTAMP	TIMESTAMP	snapshot_timestamp - Snapshot timestamp
POOL_DATA_L_READS	BIGINT	pool_data_l_reads - Buffer pool data logical reads
POOL_DATA_P_READS	BIGINT	pool_data_p_reads - Buffer pool data physical reads
POOL_ASYNC_DATA_READS	BIGINT	pool_async_data_reads - Buffer pool asynchronous data reads
POOL_DATA_WRITES	BIGINT	pool_data_writes - Buffer pool data writes
POOL_ASYNC_DATA_WRITES	BIGINT	pool_async_data_writes - Buffer pool asynchronous data writes
POOL_INDEX_L_READS	BIGINT	pool_index_l_reads - Buffer pool index logical reads
POOL_INDEX_P_READS	BIGINT	pool_index_p_reads - Buffer pool index physical reads
POOL_INDEX_WRITES	BIGINT	pool_index_writes - Buffer pool index writes
POOL_ASYNC_INDEX_WRITES	BIGINT	pool_async_index_writes - Buffer pool asynchronous index writes
POOL_READ_TIME	BIGINT	pool_read_time - Total buffer pool physical read time
POOL_WRITE_TIME	BIGINT	pool_write_time - Total buffer pool physical write time
POOL_ASYNC_READ_TIME	BIGINT	pool_async_read_time - Buffer pool asynchronous read time
POOL_ASYNC_WRITE_TIME	BIGINT	pool_async_write_time - Buffer pool asynchronous write time
POOL_ASYNC_DATA_ READ_REQS	BIGINT	pool_async_data_read_reqs - Buffer pool asynchronous read requests
DIRECT_READS	BIGINT	direct_reads - Direct reads from database
DIRECT_WRITES	BIGINT	direct_writes - Direct writes to database
DIRECT_READ_REQS	BIGINT	direct_read_reqs - Direct read requests
DIRECT_WRITE_REQS	BIGINT	direct_write_reqs - Direct write requests
DIRECT_READ_TIME	BIGINT	direct_read_time - Direct read time
DIRECT_WRITE_TIME	BIGINT	direct_write_time - Direct write time
UNREAD_PREFETCH_PAGES	BIGINT	unread_prefetch_pages - Unread prefetch pages
POOL_ASYNC_INDEX_READS	BIGINT	pool_async_index_reads - Buffer pool asynchronous index reads
POOL_DATA_TO_ESTORE	BIGINT	The pool_data_to_estore ESTORE monitor element is discontinued. A NULL value is returned for the discontinued monitor element.
POOL_INDEX_TO_ESTORE	BIGINT	The pool_index_to_estore ESTORE monitor element is discontinued. A NULL value is returned for the discontinued monitor element.
POOL_INDEX_FROM_ESTORE	BIGINT	The pool_index_from_estore ESTORE monitor element is discontinued. A NULL value is returned for the discontinued monitor element.
POOL_DATA_FROM_ESTORE	BIGINT	The pool_data_from_estore ESTORE monitor element is discontinued. A NULL value is returned for the discontinued monitor element.
FILES_CLOSED	BIGINT	files_closed - Database files closed
TABLESPACE_NAME	VARCHAR(128)	tablespace_name - Table space name