The "swap" field should be zero — if it is not, then the operating system is simulating the presence of more RAM by using disk space, which is of course a slow process.
It has not helped that RIM was slow to get new products to market, although phones with a new operating system are now appearing.
尽管拥有崭新运行系统的手机浮出水面，但这并没有影响到RIM缓慢地把新产品推向市场。
3
If the requests are varied enough to make ineffective use of the operating system's disk cache, then the server's disks will become busy and at some point slow the whole process down.