docs/functions-runtime-thread.md

id: functions-runtime-thread title: Configure thread runtime sidebar_label: “Configure thread runtime” description: Configure thread runtime for functions in Pulsar.

You can use the default configurations of thread runtime in the conf/functions_worker.yml file.

If you want to customize more parameters, such as thread group name, refer to the following example.

functionRuntimeFactoryClassName: org.apache.pulsar.functions.runtime.thread.ThreadRuntimeFactory
functionRuntimeFactoryConfigs:
  threadGroupName: "Your Function Container Group"

To set the client memory limit for thread runtime, you can configure pulsarClientMemoryLimit.

functionRuntimeFactoryConfigs:
#  pulsarClientMemoryLimit
# # the max memory in bytes the pulsar client can use
#   absoluteValue:
# # the max memory the pulsar client can use as a percentage of max direct memory set for JVM
#   percentOfMaxDirectMemory:

:::note

If absoluteValue and percentOfMaxDirectMemory are both set, the smaller value is used.

:::

For more details, see code.