What php-apc hit value mean?

Question

In apc.php, I can see :

Request Rate (hits, misses) 1110 cache requests/second

What this value mean ?

Thanks.

Answer 1

You could always look at the source of apc.php: the code line responsible for that output is

Request Rate (hits, misses)</td><td>$req_rate cache requests/second

and $req_rate is defined as

$req_rate = sprintf("%.2f",($cache['num_hits']+$cache['num_misses'])/($time-$cache['start_time']));

where $cache is the output of apc_cache_info().

So, in plain english it's the average of the sum of cache hits and misses (hence, the total request rate) per second over the time the cache has been running.