I mean they can just malloc when they need more, what am I missing? Unless this ... | Hacker News

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frollogaston 65 days ago | parent | context | favorite | on: PostgreSQL and the OOM killer: Why we use strict m...

I mean they can just malloc when they need more, what am I missing? Unless this is about JVMs which might preallocate a ton for their heaps and not use it

swappie 65 days ago [–]

Apps could, yes.

But it’s about 1000x slower to call the OS to allocate a new page, than to just use a pointer to preallocated space.

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