SQL Server eat all the Server RAM

Hi All,

  Server got 60GB RAM and SQL is eating 59GB also this server running like a dog? I just got this server to look after and want some help to sort the issues?

Select @@version

Microsoft SQL Server 2008 R2 (RTM) - 10.50.1600.1 (X64)   Apr  2 2010 15:48:46   Copyright (c) Microsoft Corporation  Standard Edition (64-bit) on Windows NT 6.1 <X64> (Build 7600: ) 

sp_configure 'max server memory'

minimum             maximum            config_value      run_value

16                    2147483647                                   4096                          4096

sp_configure 'min server memory'

name    minimum             maximum            config_value      run_value

min server memory (MB)             0              2147483647         0              0

TEMPDB is 35GB ? 

use [tempdb]
go
select * from sys.database_files
select * from sys.master_files where database_id = 2
go

1NULL0ROWS1tempdevD:\SQLData\tempdb.mdf0ONLINE332016-11000010NULLNULLNULLNULL19000002782400037D71C1F12-06F7-4E71-8A0A-58A7E837DA782012-09-17 14:00:07.560NULLNULLNULLNULLNULL

2NULL 1LOG0templogD:\SQLLogs\templog.ldf0ONLINE128000-1100 0010NULL NULLNULL NULLNULL NULLNULL NULLNULL NULLNULL NULL

database_idfile_idfile_guidtypetype_descdata_space_idnamephysical_namestatestate_descsizemax_sizegrowthis_media_read_onlyis_read_onlyis_sparseis_percent_growthis_name_reservedcreate_lsndrop_lsnread_only_lsnread_write_lsndifferential_base_lsndifferential_base_guiddifferential_base_timeredo_start_lsnredo_start_fork_guidredo_target_lsnredo_target_fork_guidbackup_lsn
21NULL0ROWS 1tempdev D:\SQLData\tempdb.mdf0ONLINE128000-110 00010 NULLNULL NULLNULL NULLNULL NULLNULL NULLNULL NULLNULL
22NULL1LOG 0templog D:\SQLLogs\templog.ldf0ONLINE128000-110 00010 NULLNULL NULLNULL NULLNULL NULLNULL NULLNULL NULLNULL

MP is for all the databases but i cannot see this tenpdb is backedup at all?

How do i run manually?

AS