available memory

基本解释

This is ideal when the entire resultset is not actually required, since it more effectively uses the available memory.
当实际上并不需要整个结果集时，这将是理想的，因为它能够更有效地使用可用内存。
You can develop an algorithm that uses little memory for management but takes more time to manage the available memory.
您可以开发一种使用少量内存进行管理的算法，但是要花费更多时间来管理可用内存。
The constraining factors for performance are the number of concurrent database connections and available memory (both RAM and disk) in relation to incoming data volume.
性能的限制因素是关于进入的数据量的并发数据库连接的数量和可用内存（RAM 和磁盘）。

I have no idea what's here at the moment so I'm just going to draw a question mark because that memory might have been used previously for some other purpose, but we know it's currently available to us so we have four bytes of memory.
我不知道在此刻这里是什么,所以我画一个问号，因为那块内存可能在之前,为其它的目的而使用过，但是我们知道它可以为我们所使用,这样我们就有4个字节的内存。
哈佛公开课 - 计算机科学课程节选

Well, for one, Microsoft's playing coy when it comes to both CPU speed and available memory.
ENGADGET: Microsoft Surface tablets: the differences between Windows RT and Windows 8 Pro models
On EC2, available CPU, storage, and available memory can be orders of magnitudes larger than on mobile devices.
ENGADGET: Amazon Silk browser spins a faster mobile web, courtesy of cloud servers (video)
Total amount of available memory may be less based on configuration.
ENGADGET: Samsung's Series 7 Slate PC hands-on Hands-on