Question

I was implementing the server-push content using comet to the client browser.
There should be updates when mysql got insert then something will happen to client, so I’m currently doing by PHP like this:

PHP
  while (check database if update is there)
  {
    usleep(10000); 
   // do write json
  }

It actually working, but what happening to me is my hosting(shared) run out of resource even when I just test with 5 simultaneous clients.
CPU is 40% loading at this moment and cause account disable.

So please someone advise any idea how to trigger php to send out the new update only without looping check.

Answer 1

I think your problem is that you have a slight error regarding usleep. The parameter should be:

micro seconds
Halt time in micro seconds. A micro second is one millionth of a
second.

Your script currently halts for 0.01 seconds instead of 10 seconds, which, I assume, is not what you wanted.

---

use:

usleep(10 * 1000000);

or:

sleep(10);