Is the MALLOC_CONF environment variable correct?

[FalkWoldmann]

Hello,

in the book, it is stated that THP can be activated in Jemalloc with MALLOC_CONF, but in the tikv-jemallocator documentation, it is said that the environment variables need to be prefixed with _RJEM_MALLOC_CONF: https://github.com/tikv/jemallocator/tree/main/jemalloc-sys#environment-variables. On my M1 mac, only setting the malloc conf this way will cause some errors on build time when including gibberish like set -gx _RJEM_MALLOC_CONF "addadthp:always,asddametadata_thp:always".

See related issue: tikv/jemallocator#65 (comment)