Ok I tested this, and found that the very first memcache get request always takes up 1 second. All subsequent gets in the same page are fast. Does anyone know what could cause the first memcache get request to slow down like this?
On 10/25/07, John Kramlich <[EMAIL PROTECTED]> wrote: > > J A wrote: > > In my application I've noticed something weird. When testing it with > > one user, the memcached page loads in like 1 second, but when I use a > > load testing software and put 20 simultaneous users on it, the page > > load goes to 0.01 second, even though the server load has gone up. > > > > I'm puzzled by this. Anyone have similar experiences? > > > > What load testing software are you using and what happens if you > configure that load testing software to emulate only a single user? If > you are running something like siege locally on your server then network > latency would be much lower than if you were running the same program on > a remote machine. That may be what makes the page load more slowly. > > You may also want to profile you code and see how long returning results > from memcache takes. If using PHP you can get a benchmarking class from > PEAR and set start and stop markers before and after you memcache > related code. Then you can output the number of milliseconds it takes > to execute that code. You can do this for other parts of your code as > well. It certainly helps when figuring out where to spend time > optimizing. > > - John Kramlich > ------------------------------ > http://www.gigoit.org - Give and get free items within your community >
