This works because windows can essentially write data

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slightly again by taking that paging file and splitting it across two drives instead of just one. This works because Windows can, essentially, write data to the two hard drives at the same timewhen it's writing data from RAM into the paging file. So, let's do that, let's click on custom size, and we'll make this one the same size as the other. Start at 2,048, and the maximum size will be 8,192.Click Set. Click OK. OK again, and click OK. And now we have two paging files configured on thesystem, but of course the second paging file won't be actually used until I reboot. Summary 7:36-7:56 That's it for this demonstration. In this demo we talked about how to manage the paging file on Windows, we began by discussing what a paging file is and what it does, and then we talked about how to configure the paging file. We moved our paging file from the C drive over to our E drive, and configured it with a custom file size, and then we ended this demonstration by creating two paging files on our system. Virtual memory is simulated memory that is implemented as a page file on a hard drive. Virtual memory is used by operating systems to simulate physical RAM using hard disk space. The process of moving data from RAM to disk (and back) is known as swapping or paging . The Virtual Memory Manager (VMM) is in charge of swapping data between physical memory and the hard disk. The VMM follows the following steps to manage applications: 1. The VMM assigns virtual addressing to an application. This is known as logical segmentation . 2. The application is then loaded into physical RAM (absolute address space). The process doesn't recognize its location in physical RAM; it only recognizes its virtual space. 3. As the user launches other applications, the VMM will allocate space to those applications in true physical RAM. 4. When there is no more space in physical RAM, the VMM will take the application that hasn't been used for the longest period of time and place it in the page file on the hard drive. This is known as paging out . Likewise, when an application is moved from the page file back into physical RAM, it is known as paging in . 5. If the system needs access to an application that has been paged out from physical RAM, this causes a problem known as a page fault . When this happens, the VMM will page out the program in the physical RAM that hasn't been used for the longest period of time to the page file on the hard drive, and will page in the application currently being accessed back to the physical RAM. Some things to remember when working with virtual memory are: Accessing data stored in RAM is faster than accessing data on disk (or in virtual memory). Symptoms of low physical memory include slow system performance when running applications, or slow response when switching between applications. Disk thrashing occurs when the amount of physical memory is so low that data must constantly be moved from physical RAM, to disk, and then back again.
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