Re: How to limit amount of memory used by vim?

On 2022-07-06 11:00, Bram Moolenaar wrote:
> because of the way Linux manages memory it will happily give more
> memory to Vim than it actually has. There is a system setting to
> change that behavior. I recall a lively discussion between Linux
> and BSD users about this stragety (BSD works just fine, Linux can
> freeze).

I believe the setting is controlled by the vm.overcommit_memory
sysctl value. Setting it to 2 instructs the kernel to never
overcommit, letting vim die when it tries to grab more RAM than
available.

https://www.kernel.org/doc/Documentation/vm/overcommit-accounting

Also, if the file is that large and if the :s// isn't overly complex
(e.g. using sub-replace-\= or other vim-specific functionality), it
might be less stressful on the system to use sed(1) instead

sed 's/old/new/g' input.log > output.log

which should run in a fairly fixed amount of RAM.

-Tim


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