DB2 Version 9.7 for Linux, UNIX, and Windows

SNAPFCM_PART administrative view and SNAP_GET_FCM_PART table function - Retrieve the fcm_node logical data group snapshot information

The SNAPFCM_PART administrative view and the SNAP_GET_FCM_PART table function return information about the fast communication manager from a database manager snapshot, in particular, the fcm_node logical data group.

SNAPFCM_PART administrative view

Used with the SNAPDBM, SNAPDBM_MEMORY_POOL, SNAPFCM and SNAPSWITCHES administrative views, the SNAPFCM_PART administrative view provides the data equivalent to the GET SNAPSHOT FOR DBM 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:

SELECT privilege on the SNAPFCM_PART administrative view
CONTROL privilege on the SNAPFCM_PART administrative view
DATAACCESS authority

In addition, one of the following privileges or authorities is also required:

EXECUTE privilege on the SNAP_GET_FCM_PART table function
DATAACCESS authority

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

SYSMON
SYSCTRL
SYSMAINT
SYSADM

Example

Retrieve buffers sent and received information for the fast communication manager.

SELECT CONNECTION_STATUS, TOTAL_BUFFERS_SENT, TOTAL_BUFFERS_RECEIVED 
   FROM SYSIBMADM.SNAPFCM_PART WHERE DBPARTITIONNUM = 0

The following example is a sample output from this query.

CONNECTION_STATUS    TOTAL_BUFFERS_SENT   TOTAL_BUFFERS_RCVD
-------------------- -------------------- --------------------
INACTIVE                                2                    1

  1 record(s) selected.

SNAP_GET_FCM_PART table function

The SNAP_GET_FCM_PART table function returns the same information as the SNAPFCM_PART administrative view, but allows you to retrieve the information for a specific database partition, aggregate of all database partitions or all database partitions.

Used with the SNAP_GET_DBM_V95, SNAP_GET_DBM_MEMORY_POOL, SNAP_GET_FCM and SNAP_GET_SWITCHES table functions, the SNAP_GET_FCM_PART table function provides the data equivalent to the GET SNAPSHOT FOR DBM command.

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

Syntax


>>-SNAP_GET_FCM_PART--(--+----------------+--)-----------------><
                         '-dbpartitionnum-'

The schema is SYSPROC.

Table function parameter

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

If dbpartitionnum 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_FCM_PART table function takes a snapshot for the currently connected database and database partition number.

Authorization

One of the following authorizations is required:

EXECUTE privilege on the SNAP_GET_FCM_PART table function
DATAACCESS authority

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

SYSMON
SYSCTRL
SYSMAINT
SYSADM

Example

Retrieve buffers sent and received information for the fast communication manager for all database partitions.

SELECT FCM_DBPARTITIONNUM, TOTAL_BUFFERS_SENT, TOTAL_BUFFERS_RCVD, 
   DBPARTITIONNUM FROM TABLE(SNAP_GET_FCM_PART()) AS T 
   ORDER BY DBPARTITIONNUM

The following example is a sample output from this query.

FCM_DBPARTITIONNUM TOTAL_BUFFERS_SENT   TOTAL_BUFFERS_RCVD   DBPARTITIONNUM
------------------ -------------------- -------------------- --------------
                 0                  305                  305              0
                 1                 5647                 1664              0
                 2                 5661                 1688              0
                 0                   19                   19              1
                 1                  305                  301              1
                 2                 1688                 5661              1
                 0                 1664                 5647              2
                 1                   10                   10              2
                 2                  301                  305              2

Information returned

Table 1. Information returned by the SNAPFCM_PART administrative view and the SNAP_GET_FCM_PART table function
Column name	Data type	Description or corresponding monitor element
SNAPSHOT_TIMESTAMP	TIMESTAMP	snapshot_timestamp - Snapshot timestamp monitor element
CONNECTION_STATUS	VARCHAR(10)	connection_status - Connection status . This interface returns a text identifier based on the defines in sqlmon.h and is one of: INACTIVE ACTIVE CONGESTED
TOTAL_BUFFERS_SENT	BIGINT	total_buffers_sent - Total FCM buffers sent
TOTAL_BUFFERS_RCVD	BIGINT	total_buffers_rcvd - Total FCM buffers received
DBPARTITIONNUM	SMALLINT	The database partition from which the data was retrieved for this row.
FCM_DBPARTITIONNUM	SMALLINT	The database partition number to which data was sent or from which data was received (as per the TOTAL_BUFFERS_SENT and TOTAL_BUFFERS_RCVD columns).