datacache_mem_size does not support 2GB like format in be.conf

[neokjchen]

Steps to reproduce the behavior (Required)

1. add datacache_mem_size=2GB to be.conf
2. start starrocks using above be.conf

Expected behavior (Required)

Be start as it did in starrocks/allin1-ubuntu:3.3.3

Real behavior (Required)

Failed to start starrocks.
be.WARN shows error

W20250222 13:11:45.703177 132909470353216 jit_engine.cpp:144] System or Process memory limit is less than 16GB, disable JIT. You can set jit_lru_cache_size a properly positive value in BE's config to force enabling JIT
E20250222 13:11:45.708092 132909470353216 datacache_utils.cpp:56] invalid mem size for datacache: -1
E20250222 13:11:45.708122 132909470353216 starrocks_be.cpp:198] Fail to init datacache

StarRocks version (Required)

• You can get the StarRocks version by executing SQL select current_version()
starrocks/allin1-ubuntu:3.3.9

[rohitrs1983]

@neokjchen incorrect format. please change to
datacache_mem_size=2G