| --- |
| id: functions-runtime-thread |
| title: Configure thread runtime |
| sidebar_label: "Configure thread runtime" |
| --- |
| |
| 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. |
| |
| ```yaml |
| 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`. |
| |
| ```yaml |
| 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](https://github.com/apache/pulsar/blob/master/pulsar-functions/runtime/src/main/java/org/apache/pulsar/functions/runtime/thread/ThreadRuntimeFactoryConfig.java). |
