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improved "How Operating Systems differ"

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boundedbuffer
2014-12-07 12:17:57 +00:00
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@@ -299,9 +299,9 @@ says the size is 71 MB after adding 10000 entries. You can see the size actually
There is two key differences between Windows and Linux
- Windows fails if you attempt to use more than 4 GB in a single mapping. This calculated as 4GB = 2^20 * 4 KB pages. This doesn't fail when you map the region, rather as you use it up.
It may be this limitation doesn't apply to newer or server based versions.
In the future we may support multiple mappings to avoid this limitation, but there is no immediate plan to do so. Windows allocates memory and disk eagerly.
- Windows allocates memory and disk eagerly - Windows fails if you attempt to use more than 4 GB in a single mapping. This calculated as 4GB = 2^20 * 4 KB pages. This doesn't fail when you map the region, rather as you use it up.
It may be this limitation doesn't apply to newer or server based versions of Windows.
In the future we may support multiple mappings to avoid this limitation, but there is no immediate plan to do so.
- Linux allocates memory and disk lazily.
- MacOSX allocates memory lazily and disk eagerly.