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phpcachingapc

What php-apc hit value mean?

In apc.php, I can see :

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

What this value mean ?

Thanks.

Solution

  • 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.