![]() So instead, imagine that the librarians construct a vast warehouse. There's no way you could possibly fit all that stuff into a single building-certainly not one in the middle of a university campus. Think of, for example, the Bodleian Library at the University of Oxford, which has eleven million printed items. ![]() To understand why, imagine an enormous library. In any case, much of this information is needed to manage and access memory, and so it can't itself be swapped out to disk! I suspect that the memory used by the integrated video chips in most Macs is wired as well, but I can't find anything that says that outright. The "page tables" that form a map of your system's memory are also stored in wired memory, and a system with more memory needs larger page tables. Wired memory is used for some of the core functions of the operating system-things like keeping track of all the applications on your system, or open files and network connections, or chunks of memory used by various drivers. ![]() It's many layers removed from the icons in the menubar, which are just ordinary apps showing themselves in an odd way. From what I can tell, wired memory belongs to the kernel, the innermost core of Mac OS X.
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