jemalloc was archived ,Redis maintains its own version or implements its own memory allocator.? https://github.com/jemalloc/jemalloc

Comment From: collinfunk

You can always use the system's libc implementation of malloc by running the following command:

$ make MALLOC=libc

Redis vendors jemalloc in deps/jemalloc and that is fairly common. For example, FreeBSD does the same.

If it is really abandoned by its original developers, then someone wil most likely step up and maintain a fork. So no need to worry, I think.