How to add metrics to grafana for ThreadPoolTaskExecutor

I found out that the response to the request lasts 3-5 seconds and 1.5k request per hours, so it's not good situation.

Endpoint - just get entity from database

@GetMapping
    @Async("operationThreadExecutor")
    public CompletableFuture<OperationDto> read()

I have next config

@Bean
    public AsyncTaskExecutor operationThreadExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(5);
        executor.setMaxPoolSize(10);
        executor.setQueueCapacity(50);
        executor.setThreadNamePrefix("OperationSelfExecutor-");
        executor.initialize();
    

How to add metrics in grafana for current connection by this endpoint and queue?

Thanks in advance.