DB2 10.5 for Linux, UNIX, and Windows

SNAPSWITCHES administrative view and SNAP_GET_SWITCHES table function - Retrieve database snapshot switch state information

The SNAPSWITCHES administrative view and the SNAP_GET_SWITCHES table function return information about the database snapshot switch state.

Depending on if you are using the administrative view or the table function, refer to one of the following sections:

SNAPSWITCHES administrative view
SNAP_GET_SWITCHES table function

SNAPSWITCHES administrative view

This view provides the data equivalent to the GET DBM MONITOR SWITCHES CLP command.

The schema is SYSIBMADM.

Refer to Table 1 for a complete list of information that can be returned.

Authorization

One of the following authorizations is required to use the view:

SELECT privilege on the SNAPSWITCHES administrative view
CONTROL privilege on the SNAPSWITCHES administrative view
DATAACCESS authority
DBADM authority
SQLADM authority

One of the following is required to use the table function:

EXECUTE privilege on the SNAP_GET_SWITCHES table function
DATAACCESS authority
DBADM authority
SQLADM authority

In addition, to access snapshot monitor data, one of the following authorities is also required:

SYSMON
SYSCTRL
SYSMAINT
SYSADM

Default PUBLIC privilege

In a non-restrictive database, SELECT privilege is granted to PUBLIC when the view is automatically created.

Example

Retrieve DBM monitor switches state information for all database members.

SELECT UOW_SW_STATE, STATEMENT_SW_STATE, TABLE_SW_STATE, BUFFPOOL_SW_STATE, 
   LOCK_SW_STATE, SORT_SW_STATE, TIMESTAMP_SW_STATE, 
   DBPARTITIONNUM FROM SYSIBMADM.SNAPSWITCHES

The following is an example of output from this query.

UOW_SW_STATE STATEMENT_SW_STATE TABLE_SW_STATE BUFFPOOL_SW_STATE ...
------------ ------------------ -------------- ----------------- ...
           0                  0              0                 0 ...
           0                  0              0                 0 ...
           0                  0              0                 0 ...
                                                                 ...
  3 record selected.

Output from this query (continued).

... LOCK_SW_STATE SORT_SW_STATE TIMESTAMP_SW_STATE DBPARTITIONNUM
... ------------- ------------- ------------------ --------------
...             1             0                  1              0
...             1             0                  1              1
...             1             0                  1              2

SNAP_GET_SWITCHES table function

The SNAP_GET_SWITCHES table function returns the same information as the SNAPSWITCHES administrative view, but allows you to retrieve the information for a specific database member, aggregate of all database members or all database members.

This table function provides the data equivalent to the GET DBM MONITOR SWITCHES CLP command.

Refer to Table 1 for a complete list of information that can be returned.

Syntax


>>-SNAP_GET_SWITCHES--(--+--------+--)-------------------------><
                         '-member-'

The schema is SYSPROC.

Table function parameter

member: An optional input argument of type INTEGER that specifies a valid database member number. Specify -1 for the current database member, or -2 for an aggregate of all active database members. If this input option is not used, data will be returned from all active database members. An active database member is a member where the database is available for connection and use by applications.

If member is set to NULL, an attempt is made to read data from the file created by SNAP_WRITE_FILE procedure. Note that this file could have been created at any time, which means that the data might not be current. If a file with the corresponding snapshot API request type does not exist, then the SNAP_GET_SWITCHES table function takes a snapshot for the currently connected database and database member number.

Authorization

One of the following authorizations is required:

EXECUTE privilege on the SNAP_GET_SWITCHES table function
DATAACCESS authority

In addition, to access snapshot monitor data, one of the following authorities is also required:

SYSMON
SYSCTRL
SYSMAINT
SYSADM

Default PUBLIC privilege

In a non-restrictive database, EXECUTE privilege is granted to PUBLIC when the function is automatically created.

Examples

Retrieve DBM monitor switches state information for the current database member.

SELECT UOW_SW_STATE, STATEMENT_SW_STATE, TABLE_SW_STATE, 
   BUFFPOOL_SW_STATE,LOCK_SW_STATE, SORT_SW_STATE, TIMESTAMP_SW_STATE 
   FROM TABLE(SNAP_GET_SWITCHES(-1)) AS T

The following is an example of output from this query.

UOW_SW_STATE STATEMENT_SW_STATE TABLE_SW_STATE...
------------ ------------------ --------------...
           1                  1              1...
                                              ...
1 record(s) selected.                         ...

Output from this query (continued).

... BUFFPOOL_SW_STATE LOCK_SW_STATE SORT_SW_STATE TIMESTAMP_SW_STATE  
... ----------------- ------------- ------------- ------------------  
...                 1             1             0                  1

Information returned

Table 1. Information returned by the SNAPSWITCHES administrative view and the SNAP_GET_SWITCHES table function
Column name	Data type	Description
SNAPSHOT_TIMESTAMP	TIMESTAMP	The date and time that the snapshot was taken.
UOW_SW_STATE	SMALLINT	State of the unit of work monitor recording switch (`0` or `1`).
UOW_SW_TIME	TIMESTAMP	If the unit of work monitor recording switch is on, the date and time that this switch was turned on.
STATEMENT_SW_STATE	SMALLINT	State of the SQL statement monitor recording switch (`0` or `1`).
STATEMENT_SW_TIME	TIMESTAMP	If the SQL statement monitor recording switch is on, the date and time that this switch was turned on.
TABLE_SW_STATE	SMALLINT	State of the table activity monitor recording switch (`0` or `1`).
TABLE_SW_TIME	TIMESTAMP	If the table activity monitor recording switch is on, the date and time that this switch was turned on.
BUFFPOOL_SW_STATE	SMALLINT	State of the buffer pool activity monitor recording switch (`0` or `1`).
BUFFPOOL_SW_TIME	TIMESTAMP	If the buffer pool activity monitor recording switch is on, the date and time that this switch was turned on.
LOCK_SW_STATE	SMALLINT	State of the lock monitor recording switch (`0` or `1`).
LOCK_SW_TIME	TIMESTAMP	If the lock monitor recording switch is on, the date and time that this switch was turned on.
SORT_SW_STATE	SMALLINT	State of the sorting monitor recording switch (`0` or `1`).
SORT_SW_TIME	TIMESTAMP	If the sorting monitor recording switch is on, the date and time that this switch was turned on.
TIMESTAMP_SW_STATE	SMALLINT	State of the timestamp monitor recording switch (0 or `1`)
TIMESTAMP_SW_TIME	TIMESTAMP	If the timestamp monitor recording switch is on, the date and time that this switch was turned on.
DBPARTITIONNUM	SMALLINT	dbpartitionnum - Database partition number monitor element
MEMBER	SMALLINT	member - Database member monitor element