Need Expert Input on this xcode error message

Hi, I’ve got this error message from xcode when I beta testing my iOS games on iPad. Below is the error message :

So far I test my games … nothing happen. But I’m worry about "applicationDidReceiveMemoryWarning() " … please enlight me … thanks

It seems that your application is using too much memory. It is probably having too much objects or high-poly models in your scene. Explore how to have less things in your scene and see if the warning pops up again.

You can use xcode instruments to see real memory use

You cant do anything against it. Memory Warnings are normal. They will kick in sooner or later, depending on how much RAM the device has, how much memory your app needs and what other apps on the devive might do in the background.
In XCode and Objective C appropiete Methods get called after this, so there you have a chance to free up some memory. If unity listens to this, i don´t know. If it does, then the garbage collector might delete its garbage. That seams to be the case, since you see this message “Unloading x unused assets…”.

Of course, if nothing gets freed up, and you receive Memory Warnings higher than level 1 and you have nothing to free up, then your app might simply get killed. So, save memory where you can.

i c … thx for all of your info … pal