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virtual memory
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- 1The 1-to-512 math behind page table overhead●A 4 KiB data page costs 8 bytes to map. That is a ratio of 1 to 512. When one address space maps a page once, the page t
A discussion of memory management arithmetic is making the rounds: a 4 KiB data page requires only 8 bytes of page table entry, a ratio of 1 to 512. When a page is mapped just once in an address space, page table overhead amounts to roughly 1/512 of mapped memory, a figure programmers find striking.
- 2
A new technical write-up examines how much physical memory page tables consume in modern computer systems, breaking down the overhead that virtual memory translation structures add on top of applications' actual memory use. Readers on Hacker News are discussing the analysis, trading notes on measurement methods and comparing the figures with their own experience running memory-heavy workloads.
- 3Online Nutrition Counseling Helps Older Adults Cut Back on Alcohol●Online Nutrition Counseling Helps Older Adults With Memory Problems Cut Back on Alcohol
A new study suggests that online nutrition counseling can help older adults with memory problems reduce their alcohol intake. The approach appears to combine dietary guidance with remote support, making it accessible for people experiencing cognitive decline. Researchers report that participants reduced drinking through structured virtual sessions, pointing to a potential low-cost intervention for a vulnerable group.