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Tarik Billa

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virtual-memory

Why doesn’t this memory eater really eat memory?

November 19, 2022 by Tarik

When your malloc() implementation requests memory from the system kernel (via an sbrk() or mmap() system call), the kernel only makes a note that you have requested the memory and where it is to be placed within your address space. It does not actually map those pages yet. When the process subsequently accesses memory within … Read more

Categories c Tags c++, linux, memory, virtual-memory Leave a comment

Virtual Memory Usage from Java under Linux, too much memory used

October 1, 2022 by Tarik

This has been a long-standing complaint with Java, but it’s largely meaningless, and usually based on looking at the wrong information. The usual phrasing is something like “Hello World on Java takes 10 megabytes! Why does it need that?” Well, here’s a way to make Hello World on a 64-bit JVM claim to take over … Read more

Categories java Tags java, linux, memory, virtual-memory Leave a comment
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Tarik Billa

Software Engineer
tarikbilla@gmail.com
+8801884414000
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