DB2 Version 10.1 for Linux, UNIX, and Windows

SNAPAGENT administrative view and SNAP_GET_AGENT table function - Retrieve agent logical data group application snapshot information

The SNAPAGENT administrative view and the SNAP_GET_AGENT table function return information about agents from an application snapshot, in particular, the agent logical data group.

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

SNAPAGENT administrative view
SNAP_GET_AGENT table function

SNAPAGENT administrative view

This administrative view allows you to retrieve agent logical data group application snapshot information for the currently connected database.

Used with the SNAPAGENT_MEMORY_POOL, SNAPAPPL, SNAPAPPL_INFO, SNAPSTMT and SNAPSUBSECTION administrative views, the SNAPAGENT administrative view provides information equivalent to the GET SNAPSHOT FOR APPLICATIONS ON database-alias CLP command, but retrieves data from all database members.

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 SNAPAGENT administrative view
CONTROL privilege on the SNAPAGENT 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_AGENT 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 all application snapshot information for the currently connected database from the agent logical data group.

SELECT * FROM SYSIBMADM.SNAPAGENT

The following is an example of output from this query.

SNAPSHOT_TIMESTAMP         DB_NAME     AGENT_ID        ... 
-------------------------- -------...- ---------...--- ... 
2005-07-19-11.03.26.740423 SAMPLE                  101 ... 
2005-07-19-11.03.26.740423 SAMPLE                   49 ... 
                                                       ... 
  2 record(s) selected.                                ...

Output from this query (continued).

...  AGENT_PID            LOCK_TIMEOUT_VAL     DBPARTITIONNUM
...  -------------------- -------------------- --------------
...                 11980                   -1              0
...                 15940                   -1              0
...                                                          
...

SNAP_GET_AGENT table function

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

Used with the SNAP_GET_AGENT_MEMORY_POOL, SNAP_GET_APPL, SNAP_GET_APPL_INFO, SNAP_GET_STMT and SNAP_GET_SUBSECTION table functions, the SNAP_GET_AGENT table function provides information equivalent to the GET SNAPSHOT FOR ALL APPLICATIONS CLP command, but retrieves data from all database members.

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

Syntax


>>-SNAP_GET_AGENT--(--dbname--+----------+--)------------------><
                              '-, member-'

The schema is SYSPROC.

Table function parameters

dbname: An input argument of type VARCHAR(128) that specifies a valid database name in the same instance as the currently connected database. Specify a database name that has a directory entry type of either "Indirect" or "Home", as returned by the LIST DATABASE DIRECTORY command. Specify an empty string to take the snapshot from the currently connected database. Specify a NULL value to take the snapshot from all databases within the same instance as the currently connected database.
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 dbname is not set to NULL and member is set to NULL, -1 is set implicitly for member. If this input option is not used, that is, only dbname is provided, data is 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 both dbname and member are 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_AGENT 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_AGENT 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.

Example

Retrieve all application snapshot information for all applications in all active databases.

SELECT * FROM TABLE(SNAP_GET_AGENT(CAST(NULL AS VARCHAR(128)), -1)) AS T

The following is an example of output from this query.

SNAPSHOT_TIMESTAMP         DB_NAME     AGENT_ID      ... 
-------------------------- -------...- --------...-- ... 
2006-01-03-17.21.38.530785 SAMPLE                 48 ... 
2006-01-03-17.21.38.530785 SAMPLE                 47 ... 
2006-01-03-17.21.38.530785 SAMPLE                 46 ... 
2006-01-03-17.21.38.530785 TESTDB                 30 ... 
2006-01-03-17.21.38.530785 TESTDB                 29 ... 
2006-01-03-17.21.38.530785 TESTDB                 28 ... 
                                                         
6 record(s) selected.

Output from this query (continued).

... AGENT_PID        LOCK_TIMEOUT_VAL     DBPARTITIONNUM 
... ---------...---- -------------------- -------------- 
...             7696                   -1              0 
...             8536                   -1              0 
...             6672                   -1              0 
...             2332                   -1              0 
...             8360                   -1              0 
...             6736                   -1              0 
...

Information returned

Table 1. Information returned by the SNAPAGENT administrative view and the SNAP_GET_AGENT table function
Column name	Data type	Description or corresponding monitor element
SNAPSHOT_TIMESTAMP	TIMESTAMP	The date and time that the snapshot was taken.
DB_NAME	VARCHAR(128)	db_name - Database name
AGENT_ID	BIGINT	agent_id - Application handle (agent ID)
AGENT_PID	BIGINT	agent_pid - Engine dispatchable unit (EDU)
LOCK_TIMEOUT_VAL	BIGINT	lock_timeout_val - Lock timeout (seconds)
DBPARTITIONNUM	SMALLINT	dbpartitionnum - Database partition number monitor element
MEMBER	SMALLINT	member - Database member monitor element