I have a apache 2.4, php, mysql based web application. The application works like charm most of the time with 40ms response times. Already performance tuned with apache cache, php's opcache and apache mod_deflate.
However rarely once every 2 hours or so...when I invoke the application on a browser...it hangs saying waiting ..... for few seconds say 40 seconds or so...and then picks up back to super speed.
what do you think could be possible reasons?
Just for information. it's all localhost. and there is no network.
