Constant mz_rocksdb_types::config::defaults::DEFAULT_OPTIMIZE_COMPACTION_MEMTABLE_BUDGET

pub const DEFAULT_OPTIMIZE_COMPACTION_MEMTABLE_BUDGET: usize = _; // 178_956_970usize

From here: https://github.com/facebook/rocksdb/blob/main/include/rocksdb/options.h#L102 And then setting it to 1/3rd from our testing in production