I'm currently benchmarking an application built on Leveldb. I want to configure it in such a way that the key-values are always read from disk and not from memory.
For that, I need to limit the memory consumed by the program.
I'm using key-value pairs of 100 bytes each and 100000 of them, which makes their size equal to 10 MB. If I set the virtual memory limit to less than 10 MB using ulimit, I can't even run the command Makefile
.
1) How can I configure the application so that the key value pairs are always fetched from the disk?
2) What does ulimit -v mean? Does limiting the virtual memory translate to limiting the memory used by the program on RAM?
Perhaps there is no need in reducing available memory, but simply disable cache as described here: