It tells us here that the paging files an area on the

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It tells us here that the paging file's an area on the hard disk drive that Windows uses as if it were real RAM. So the data's still loaded, it's just not loaded into physical RAM, it's loaded into memory dresseson the hard disk drive itself, and that frees up space in the physical RAM for other processes to use. Now, if later on that data that we swapped to the hard disk drive is needed again, we can pull back out of the hard disk drive and insert it back into the physical RAM, and then we can actively process it once again. So as you might guess, the size of that paging file is actually kind of important. Right now the total paging file size for all drives is a little over one gigabyte. Let's click on the change button right here, and notice that by default, Windows is going to automatically manage the size of the paging file on all hard disk drives. In essence, this allows Windows to just take a look at things, and say, "Yeah, I think I need a paging file that's about this big," and automatically create it. And, by default, you can see here that it's going to be created on the C drive, not on my E drive. And down here we can see the total paging file size for all drives that have paging files on them. The minimum allowed is 16 megabytes, the recommended is 1,407. The currently allocated size is 1,408. Now, if the demand on the system increases, Windows can dynamically increase the size of this paging file as needed. Right now, it's only a little over a gigabyte, because that's all Windows thinks it needs. However, a general rule of thumb, is that your paging files should be about one and a half to two times the size of the installed RAM on this system. Now this system already has four gigabytes installed. Therefore, we would probably want to have a paging file that's about six gigabytes in size. Now usually letting Windows automatically manage the size of the paging file is sufficient, is the default configuration. In fact, most of the systems are left this way. However, if you want to, you can manually configure the size of the paging file and the location of the paging file yourself. There's a couple of good reasons for doing that. First of all, we have the paging file here on the C drive. Well, the C drive is a heavily used drive, and if you end up running out of space on that drive, you can free up a lot of space on that drive by moving the paging file from the C drive to a different drive. In addition, moving that paging file off of that heavily utilized C drive to the lightly used E drive, can actually increase the overall performance of the system. Now, how much performance increase will you see? Well, it depends upon how heavily utilized the system is. If we're dealing with a lightly utilized system, you probably won't see a lot of performance benefit from moving the paging file, but on a very heavily utilized system, you might see a slight increase in performance by moving that paging file.
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