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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