How to empty swap if there is free RAM?

Posted by jfoucher on Ask Ubuntu See other posts from Ask Ubuntu or by jfoucher
Published on 2010-08-06T06:43:23Z Indexed on 2011/01/03 13:01 UTC
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Performance

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swap

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ram-usage

When I open a RAM-intensive app (VirtualBox set at 2 Gb RAM), Some swap space is generally used, depending on what else I have open at the time.

However, when I quit that last application, the 2 Gb of RAM are freed, but the same swap space use remains.

How can I tell ubuntu to stop using that swap and to revert to using the RAM?

Thank you

Edit : Right now, about 2 hours after having closed VirtualBox, I have 1.6 Gb free RAM and still 770 Mb in swap.

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