How to use Jemalloc memory allocator only for a certain process on Ubuntu?

Question

I am using Jemalloc on Ubuntu 20.04 for my nodejs apps using export LD_PRELOAD=$LD_PRELOAD:/usr/lib/aarch64-linux-gnu/libjemalloc.so and it works really well. However I am not able to benefit from it with Chromium-browser and I run into

ERROR: ld.so: object '/usr/lib/aarch64-linux-gnu/libjemalloc.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object '/usr/lib/aarch64-linux-gnu/libjemalloc.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object '/usr/lib/aarch64-linux-gnu/libjemalloc.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object '/usr/lib/aarch64-linux-gnu/libjemalloc.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object '/usr/lib/aarch64-linux-gnu/libjemalloc.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object '/usr/lib/aarch64-linux-gnu/libjemalloc.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object '/usr/lib/aarch64-linux-gnu/libjemalloc.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object '/usr/lib/aarch64-linux-gnu/libjemalloc.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object '/usr/lib/aarch64-linux-gnu/libjemalloc.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.

Is there anyway I can only use Jemalloc for nodejs apps and not get it involved with other processes on the server?

Answer 1

With the env helper:

env LD_PRELOAD=$LD_PRELOAD:/usr/lib/aarch64-linux-gnu/libjemalloc.so node myapp.js

(where node myapp.js is your app - could as well be npm start or whatever.)