User-defined Functions

udf_memory_limit

Parameter description: Specifies the maximum physical memory that can be used when CNs and DNs execute UDFs. This parameter does not take effect in the current version. Use FencedUDFMemoryLimit and UDFWorkerMemHardLimit to control virtual memory used by fenced udf worker.

This parameter is a POSTMASTER parameter. Set it based on instructions provided in Table 1.

Value range: an integer ranging from 200 x 1024 to 2147483647. The unit is KB.

Default value: 200 MB

FencedUDFMemoryLimit

Parameter description: Specifies the virtual memory used by each fenced udf worker process.

This parameter is a USERSET parameter. Set it based on instructions provided in Table 1.

Value range: an integer ranging from 0 KB to 2147483647 KB. The unit can also be MB or GB. 0 indicates that the memory is not limited.

Default value: 0

UDFWorkerMemHardLimit

Parameter description: Specifies the maximum value of fencedUDFMemoryLimit.

This parameter is a POSTMASTER parameter. Set it based on instructions provided in Table 1.

Value range: an integer ranging from 0KB to 2147483647KB. The unit can also be MB or GB.

Default value: 1GB

pljava_vmoptions

Parameter description: Specifies the startup parameters for JVMs used by the PL/Java function. Only the sysadmin user can access this parameter. (The current feature is a lab feature. Contact Huawei technical support before using it.)

This parameter is a SUSET parameter. Set it based on instructions provided in Table 1.

Value range: a string, supporting:

• JDK8 JVM startup parameters. For details, see JDK official descriptions.
• JDK8 JVM system attributes (starting with –D, for example, –Djava.ext.dirs). For details, see JDK official descriptions.
• User-defined parameters (starting with –D, for example, –Duser.defined.option).

If pljava_vmoptions is set to a value beyond the value range, an error will be reported when PL/Java functions are used.

Default value: empty