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Ask Deemable Tech: Why Is My 'Virtual Memory' Too Low?

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Osler writes, "I often get a message from my laptop saying that the virtual memory is too low and that the computer will adjust it. Why is this happening almost four to five times a week?"

Thanks for the question, Osler! Before we explain what “virtual memory” is, we’re going to just go ahead and tell you what your problem is: your hard drive is too full. Consider uninstalling a few programs you no longer need on your laptop, and moving large multimedia files off of your computer and onto an external hard drive. Computer games and video files are especially notorious for taking up a lot of hard drive space.

If you’re not sure what is eating up the most room on your computer, we recommend using a program called WinDirStat. It does a fantastic job of showing you which files and programs are taking up the most space, so you can then delete the ones you don’t need any more or move them to an external hard drive. Once you clear off some of those files, you should stop getting those annoying messages.

Now onto what virtual memory is. Your laptop has two main ways to store information: RAM (often referred to as “memory”) and the hard drive. Accessing the RAM is really fast, so your computer will try to store as many running programs and streaming videos as possible there.

The thing about RAM, though, is that you often don’t have that much of it – your computer probably only has two, four or maybe eight gigabytes of it. When it comes to hard drive space, on the other hand, your computer may have 500 or even 1000 gigabytes of that. When your computer runs low on RAM, it will use the slower hard drive to augment the memory. This is known as virtual memory.

Basically, your computer carves off chunks of whatever it was try to put in the real memory, and puts it into the virtual memory on your hard drive instead. But this won’t work very well if you’re low on hard drive space. At that point, your system is constantly trying to swap things between the RAM and the hard dive in tiny bits, and your computer can really grind to a halt.

Windows will try to help you with this problem, which is when you are getting those messages, but it can’t do anything if you just don’t have enough free space on your hard drive. So, we said, try clearing a few things off of it, and you should be back to normal.

For more great tech ad?vice, listen to Deemable Tech's full length podcast at Deemable.com. You can also follow them on Twitter @Deemable.

Sean Birch joined the WJCT team in late 2011 and was with the company until 2016.
Ray Hollister can be reached at rhollister@wjct.org, 904-358-6341 or on Twitter at @rayhollister.
Tom Braun is a writer living in Jacksonville, Florida. In addition to writing about tech and co-hosting WJCT’s Deemable Tech, he writes content for websites and blogs, ghostwrites ebooks, writes short fiction and has written a woefully unpublished dystopian young adult novel that is no doubt his ticket to fame and fortune. Before realizing his true calling as a writer, Tom worked for over a decade as a software developer. He enjoys board games and traveling and once spent a year living in The Netherlands.