DBE_ILM_ADMIN

Interface Description

Implements ILM policies, and controls ADO background scheduling and concurrency control parameters.

When there are a large number of concurrent requests and you run DBE_ILM_ADMIN.DISABLE_ILM or DBE_ILM_ADMIN.ENABLE_ILM, the system may display the message "Resources are busy, please try again later." In this case, try again later.

• DBE_ILM_ADMIN.CUSTOMIZE_ILM

  Customizes ILM policy attributes based on input parameters. The prototype is as follows:

  1 2 3

  DBE_ILM_ADMIN.CUSTOMIZE_ILM ( parameter IN int8, value IN int8);

  Table 2 DBE_ILM_ADMIN.CUSTOMIZE_ILM parameters

  Parameter	Description
  parameter	Sequence number of a parameter.
  value	Parameter value.

  Table 3 DBE_ILM_ADMIN.CUSTOMIZE_ILM parameters

  Parameter ID	Parameter Value	Description
  1	EXECUTION_INTERVAL	Specifies the frequency of executing an ADO task, in minutes. The default value is 15. The value is an integer or floating-point number greater than or equal to 1 and less than or equal to 2147483647. The value is rounded down.
  2	RETENTION_TIME	Specifies the retention period of ADO-related history records, in days. The default value is 30. The value is an integer or floating-point number greater than or equal to 1 and less than or equal to 2147483647. The value is rounded down.
  7	ENABLE	Specifies the background scheduling status which cannot be modified in this interface. Otherwise, the message "Invalid argument value, ENABLED should be change by calling DBE_ILM_ADMIN.ENABLE_ILM and DBE_ILM_ADMIN.DISABLE_ILM" is displayed. Instead, use disable_ilm() and enable() to modify it.
  11	POLICY_TIME	Specifies whether the time unit of ADO is day or second. The time unit second is used only for testing. Possible values are: 0: ILM_POLICY_IN_DAYS (default value) 1: ILM_POLICY_IN_SECONDS
  12	ABS_JOBLIMIT	Specifies the maximum number of ADO jobs generated by an ADO task. The value is an integer or floating-point number greater than or equal to 0 and less than or equal to 2147483647. The value is rounded down.
  13	JOB_SIZELIMIT	Specifies the maximum number of bytes that can be processed by a single ADO job. The unit is MB. The value is an integer or floating-point number greater than or equal to 1 and less than or equal to 2147483647. The value is rounded down.
  14	WIND_DURATION	Specifies the maintenance window duration, in minutes. The default value is 240 minutes (4 hours). The value is an integer greater than or equal to 0 and less than 1440 (24 hours).
  15	BLOCK_LIMITS	Specifies the upper limit of the instance-level row-store compression rate. The default value is 40. The value ranges from 0 to 10000, in block/ms, indicating the maximum number of blocks that can be compressed per millisecond. 0 indicates that the rate is not limited.

• DBE_ILM_ADMIN.DISABLE_ILM

  Disables background scheduling. The prototype is as follows:

  1	gaussdb=# DBE_ILM_ADMIN.DISABLE_ILM();

• DBE_ILM_ADMIN.ENABLE_ILM

  Enables background scheduling. The prototype is as follows:

  1	gaussdb=# DBE_ILM_ADMIN.ENABLE_ILM();

  Note: To make background scheduling take effect, you need to enable the GUC parameter enable_ilm on the management and control plane.

Examples

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gaussdb=# CALL DBE_ILM_ADMIN.CUSTOMIZE_ILM(1, 15);
 customize_ilm 
---------------

(1 row)
gaussdb=# select * from gs_adm_ilmparameters;
        name        | value 
--------------------+-------
 EXECUTION_INTERVAL |    15
 RETENTION_TIME     |    30
 ENABLED            |     1
 POLICY_TIME        |     0
 ABS_JOBLIMIT       |    10
 JOB_SIZELIMIT      |  1024
 WIND_DURATION      |   240
 BLOCK_LIMITS       |    40
(8 rows)