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I'm reading conflicting definitions around the web, so wanted to check whether someone could verify this. Typically, I have understood virtual memory to be physical memory (RAM) + swap space ...
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  1. #1
    Just Joined!
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    Virtual memory and kernel parameters


    I'm reading conflicting definitions around the web, so wanted to check whether someone could verify this.

    Typically, I have understood virtual memory to be physical memory (RAM) + swap space (Wikipedia backs me up). However, I've read several forums where people have simply defined virtual memory as only the amount of swap space on the machine. Which is it?

    Also, when trying to appropriately tune the shared memory kernel parameters (shmall, shmmax, shmmni), should I tune them based on the amount of physical memory or the amount of virtual memory in the system?

    Thanks

  2. #2
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    Virtual memory as I understand it is swap space. This will help you
    redhat.com | Red Hat Magazine - Understanding Virtual Memory

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