Hi, I'm using SQL Server 2014!

The column name is [[highlight=#ffff11]physical_memory_kb[/highlight]]! There's no column [physical_memory_in_bytes] in sys.dm_os_sys_info;

Here are all the columns in the DMV sys.dm_os_sys_info

cpu_ticks

ms_ticks

cpu_count

hyperthread_ratio

physical_memory_kb

virtual_memory_kb

committed_kb

committed_target_kb

visible_target_kb

stack_size_in_bytes

os_quantum

os_error_mode

os_priority_class

max_workers_count

scheduler_count

scheduler_total_count

deadlock_monitor_serial_number

sqlserver_start_time_ms_ticks

sqlserver_start_time

affinity_type

affinity_type_desc

process_kernel_time_ms

process_user_time_ms

time_source

time_source_desc

virtual_machine_type

virtual_machine_type_desc