Constant tikv_jemalloc_sys::MALLOCX_TCACHE_NONE 
source · pub const MALLOCX_TCACHE_NONE: c_int = _; // 256i32Expand description
Do not use a thread-specific cache (tcache).
Unless MALLOCX_TCACHE(tc) or MALLOCX_TCACHE_NONE is specified, an
automatically managed tcache will be used under many circumstances.
Safety
This option cannot be used in the same flags argument as
MALLOCX_TCACHE(tc).