SNAPAGENT_MEMORY_POOL administrative view and SNAP_GET_AGENT_MEMORY_POOL table function - Retrieve memory_pool logical data group snapshot information
The SNAPAGENT_MEMORY_POOL administrative view and the SNAP_GET_AGENT_MEMORY_POOL table function return information about memory usage at the agent level.
SNAPAGENT_MEMORY_POOL administrative view
This administrative view allows you to retrieve the memory_pool logical data group snapshot information about memory usage at the agent level for the currently connected database.
Used with the MON_GET_AGENT and MON_GET_CONNECTION table functions and the MON_CURRENT_SQL and SNAPSUBSECTION administrative views, the SNAPAGENT_MEMORY_POOL administrative view provides information equivalent to the GET SNAPSHOT FOR APPLICATIONS ON database-alias CLP command.
The schema is SYSIBMADM.
Refer to Table 1 for a complete list of information that can be returned.
Authorization
- SELECT privilege on the SNAPAGENT_MEMORY_POOL administrative view
- CONTROL privilege on the SNAPAGENT_MEMORY_POOL administrative view
- DATAACCESS authority
- DBADM authority
- SQLADM authority
- ACCESSCTRL authority
- SECADM authority
- EXECUTE privilege on the SNAP_GET_AGENT_MEMORY_POOL 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 AGENT_ID, POOL_ID, POOL_CUR_SIZE FROM SYSIBMADM.SNAPAGENT_MEMORY_POOLAGENT_ID POOL_ID POOL_ CUR_SIZE
--------...--- -------------- ---------...------
48 APPLICATION 65536
48 OTHER 65536
48 APPL_CONTROL 65536
47 APPLICATION 65536
47 OTHER 131072
47 APPL_CONTROL 65536
46 OTHER 327680
46 APPLICATION 262144
46 APPL_CONTROL 65536
9 record(s) selected.SNAP_GET_AGENT_MEMORY_POOL table function
The SNAP_GET_AGENT_MEMORY_POOL table function returns the same information as the SNAPAGENT_MEMORY_POOL 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_APPL, SNAP_GET_APPL_INFO, SNAP_GET_STMT and SNAP_GET_SUBSECTION table functions, the SNAP_GET_AGENT_MEMORY_POOL table function provides information equivalent to the GET SNAPSHOT FOR ALL APPLICATIONS CLP command.
Refer to Table 1 for a complete list of information that can be returned.
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_AGENT_MEMORY_POOL table function takes a snapshot for the currently connected database and database member number.
Authorization
- EXECUTE privilege on the SNAP_GET_AGENT_MEMORY_POOL 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 SUBSTR(DB_NAME,1,8) AS DB_NAME, AGENT_ID, POOL_ID, POOL_CUR_SIZE
FROM TABLE(SNAP_GET_AGENT_MEMORY_POOL(CAST (NULL AS VARCHAR(128)), -1))
AS TDB_NAME AGENT_ID POOL_ID POOL_CUR_SIZE
-------- --------...--- -------------- --------------------
SAMPLE 48 APPLICATION 65536
SAMPLE 48 OTHER 65536
SAMPLE 48 APPL_CONTROL 65536
SAMPLE 47 APPLICATION 65536
SAMPLE 47 OTHER 131072
SAMPLE 47 APPL_CONTROL 65536
SAMPLE 46 OTHER 327680
SAMPLE 46 APPLICATION 262144
SAMPLE 46 APPL_CONTROL 65536
TESTDB 30 APPLICATION 65536
TESTDB 30 OTHER 65536
TESTDB 30 APPL_CONTROL 65536
TESTDB 29 APPLICATION 65536
TESTDB 29 OTHER 131072
TESTDB 29 APPL_CONTROL 65536
TESTDB 28 OTHER 327680
TESTDB 28 APPLICATION 65536
TESTDB 28 APPL_CONTROL 65536
18 record(s) selected.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 |
| AGENT_ID | BIGINT | agent_id - Application handle (agent ID) |
| AGENT_PID | BIGINT | agent_pid - Engine dispatchable unit (EDU) |
| POOL_ID | VARCHAR(14) | pool_id - Memory pool identifier . This interface
returns a text identifier based on defines in sqlmon.h,
and is one of:
|
| POOL_CUR_SIZE | BIGINT | pool_cur_size - Current size of memory pool |
| POOL_WATERMARK | BIGINT | pool_watermark - Memory pool watermark |
| POOL_CONFIG_SIZE | BIGINT | pool_config_size - Configured size of memory pool |
| DBPARTITIONNUM | SMALLINT | dbpartitionnum - Database partition number monitor element |
| MEMBER | SMALLINT | member - Database member monitor element |