Needs to added default data cache to 1GB

Hi All,

When i tried to change defualt data cache getting below prompt.

1> sp_cacheconfig "default data cache", "1024M"

2> go

Msg 10879, Level 16, State 1:

Server 'TST', Procedure 'sp_cacheconfig', Line 1752:

The current 'max memory' value '1792000', is not sufficient to change the size

of cache 'default data cache' to '1024M' (1048576 KB). 'max memory' should be

greater than 'total logical memory' '2024571' required for the configuration.

(return status = 1)

How to add 1GB for default data cahce.

Please suggest.