total data cache size

total data cache size reports the amount of memory, in kilobytes, that is currently available for data, index, and log pages. This parameter is a calculated value that is not directly user-configurable.

Summary Information
Default value	0
Range of values	0 – 2147483647
Status	Calculated
Display level	Basic
Required role	System administrator
Configuration groups	Cache Manager, Memory Use

The amount of memory available for the data cache can be affected by a number of factors, including:

The amount of physical memory available on your machine
The values to which the following parameters are set:
- total logical memory
- number of user connections
- total procedure cache percent
- number of open databases
- number of open objects
- number of open indexes
- number of devices

A number of other parameters also affect the amount of available memory, but to a lesser extent.