presto-main/src/main/java/io/prestosql/memory/MemoryManagerConfig.java/MemoryManagerConfig/setMaxQueryTotalMemory
class MemoryManagerConfig:    @Config("query.max-total-memory")
    public MemoryManagerConfig setMaxQueryTotalMemory(DataSize maxQueryTotalMemory)
    {
        this.maxQueryTotalMemory = maxQueryTotalMemory;
        return this;
    }