Multithreading best practices : constraining tasks newFixedThreadPool

Question

I want to launch a lot of tasks to run on a database of +-42Mio records. I want to run this in batches of 5000 records/time (results in 850 tasks). I also want to limit the

Answer 1

Changed from your code:

    ExecutorService executorService = Executors.newFixedThreadPool(16);
    for (int j = 1; j < 900 + 1; j++) {
        int start = (j - 1) * 5000;
        int stop = (j) * 5000 - 1;
        FetcherRunner runner = new FetcherRunner(routes, start, stop);
        executorService.submit(runner);

    }