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Go's memory management, ulimit -v, and RSS controlGo's memory management, ulimit -v, and RSS controlPosted Feb 17, 2011 16:31 UTC (Thu) by meuh (subscriber, #22042)Parent article: Go's memory management, ulimit -v, and RSS control
Even if not allocating physical memory, reservation of 16GB might have an impact on the number of memory descriptors (pgd, pmd, pte ?) allocated by the kernel.
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Go's memory management, ulimit -v, and RSS control Posted Sep 27, 2011 17:14 UTC (Tue) by Blaisorblade (guest, #25465) [Link]
PGD, PMD and PTE are part of page tables, and they won't be allocated by a simple mmap. The kernel will record the mmap with a single VMA (a structure representing an mmap), which is small. My only concern is that if you do actual allocations (i.e. change protections) a page at a time, you'll get a VMA for each page, and that consumes memory and slows down page faults for that program. A good memory manager will allocate memory from the OS in bigger chunks, and I hope/guess that Go's memory manager is good enough to do this.
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