SNAPSUBSECTION administrative view and SNAP_GET_SUBSECTION table function - Retrieve subsection logical monitor group snapshot information
The SNAPSUBSECTION administrative view and the SNAP_GET_SUBSECTION table function return information about application subsections, namely the subsection logical monitor grouping.
SNAPSUBSECTION administrative view
This administrative view allows you to retrieve subsection logical monitor group snapshot information for the currently connected database.
Used with the MON_CURRENT_SQL administrative view and the MON_GET_AGENT, MON_GET_CONNECTION, MON_GET_MEMORY_POOL, and MON_GET_MEMORY_SET table functions, the SNAPSUBSECTION 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.
Authorization
- SELECT privilege on the SNAPSUBSECTION administrative view
- CONTROL privilege on the SNAPSUBSECTION administrative view
- DATAACCESS authority
- DBADM authority
- SQLADM authority
- EXECUTE privilege on the SNAP_GET_SUBSECTION table function
- DATAACCESS authority
- DBADM authority
- SQLADM authority
- 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
SELECT DB_NAME, STMT_TEXT, SS_STATUS, DBPARTITIONNUM
FROM SYSIBMADM.SNAPSUBSECTION
ORDER BY DB_NAME, SS_STATUS, DBPARTITIONNUM
DB_NAME STMT_TEXT SS_STATUS DBPARTITIONNUM
-------...- ----------------------...- ---------...- --------------
SAMPLE select * from EMPLOYEE EXEC 0
SAMPLE select * from EMPLOYEE EXEC 1
SNAP_GET_SUBSECTION table function
The SNAP_GET_SUBSECTION table function returns the same information as the SNAPSUBSECTION 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, SNAP_GET_AGENT_MEMORY_POOL, SNAP_GET_APPL, SNAP_GET_APPL_INFO and SNAP_GET_STMT table functions, the SNAP_GET_SUBSECTION table function provides information equivalent to the GET SNAPSHOT FOR ALL APPLICATIONS CLP command, but retrieves data from all database members.
Syntax
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_SUBSECTION table function takes a snapshot for the currently connected database and database member number.
Authorization
- EXECUTE privilege on the SNAP_GET_SUBSECTION table function
- DATAACCESS authority
- 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
SELECT DB_NAME, STMT_TEXT, SS_STATUS, DBPARTITIONNUM
FROM TABLE(SYSPROC.SNAP_GET_SUBSECTION( '', 0 )) as T
ORDER BY DB_NAME, SS_STATUS, DBPARTITIONNUM
DB_NAME STMT_TEXT SS_STATUS DBPARTITIONNUM
-------...- ----------------------...- ---------...- --------------
SAMPLE select * from EMPLOYEE EXEC 0
SAMPLE select * from EMPLOYEE EXEC 1
Information returned
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 |
STMT_TEXT | CLOB(16 M) | stmt_text - SQL statement text |
SS_EXEC_TIME | BIGINT | ss_exec_time - Subsection execution elapsed time |
TQ_TOT_SEND_SPILLS | BIGINT | tq_tot_send_spills - Total number of table queue buffers overflowed |
TQ_CUR_SEND_SPILLS | BIGINT | tq_cur_send_spills - Current number of table queue buffers overflowed |
TQ_MAX_SEND_SPILLS | BIGINT | tq_max_send_spills - Maximum number of table queue buffers overflows |
TQ_ROWS_READ | BIGINT | tq_rows_read - Number of rows read from table queues |
TQ_ROWS_WRITTEN | BIGINT | tq_rows_written - Number of rows written to table queues |
ROWS_READ | BIGINT | rows_read - Rows read |
ROWS_WRITTEN | BIGINT | rows_written - Rows written |
SS_USR_CPU_TIME_S | BIGINT | ss_usr_cpu_time - User CPU time used by subsection |
SS_USR_CPU_TIME_MS | BIGINT | ss_usr_cpu_time - User CPU time used by subsection |
SS_SYS_CPU_TIME_S | BIGINT | ss_sys_cpu_time - System CPU time used by subsection |
SS_SYS_CPU_TIME_MS | BIGINT | ss_sys_cpu_time - System CPU time used by subsection |
SS_NUMBER | INTEGER | ss_number - Subsection number |
SS_STATUS | VARCHAR(20) | ss_status - Subsection status . This interface
returns a text identifier based on defines in sqlmon.h and
is one of:
|
SS_NODE_NUMBER | SMALLINT | ss_node_number - Subsection node number |
TQ_NODE_WAITED_FOR | SMALLINT | tq_node_waited_for - Waited for node on a table queue |
TQ_WAIT_FOR_ANY | INTEGER | tq_wait_for_any - Waiting for any node to send on a table queue |
TQ_ID_WAITING_ON | INTEGER | tq_id_waiting_on - Waited on node on a table queue |
DBPARTITIONNUM | SMALLINT | dbpartitionnum - Database partition number monitor element |
MEMBER | SMALLINT | member - Database member monitor element |
* To calculate the total time spent for the monitor element that this column is based on, you must add the full seconds reported in the column for this monitor element that ends with _S to the fractional seconds reported in the column for this monitor element that ends with _MS, using the following formula: (monitor-element-name_S × 1,000,000 + monitor-element-name_MS) ÷ 1,000,000. For example, (ELAPSED_EXEC_TIME_S × 1,000,000 + ELAPSED_EXEC_TIME_MS) ÷ 1,000,000. |