I'm using Hystrix in a Spring Cloud application with commands defined like

@HystrixCommand(groupKey = "GroupKey", commandKey = "dummy",
        threadPoolProperties = {
                @HystrixProperty(name = "coreSize", value = "10")
public Observable<String> dummy() {
    return new ObservableResult<String>() {
        @Override
        public String invoke() {
            return "OK";
I want to update the coreSize (size of thread pool) property at runtime. How can that be done? Is it possible? Or should I look for different solution?
I've been reading about Archaius and how it's used for updating configurations but I don't understand how it can be used for what I'm trying to accomplish.
In my main class I'm using @EnableAutoConfiguration which adds ArchaiusAutoConfiguration to the application.
Thanks for any help!
Create a config.properties file for Archaius, containing the line
hystrix.threadpool.YOUR_GROUP_KEY.coreSize=10
Make sure that the file is on your application's classpath or explicitly configure the location in a JVM property, e.g. 
-Darchaius.configurationSource.additionalUrls=file:///opt/myapp/config.properties
Archaius usually reads the file once a minute, so settings will be applied without application restart.
        
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