By default a heap size of 1024MB (1.7 and later) or 512MB (1.6 and earlier) is allocated to Experian Payments Gateway. This is sufficient for the majority of our customers.
If you regularly get out of memory errors, you may need to increase the memory allocation. Typically this is only required for extremely high-volume, high-usage installations.
To change the heap size allocated to the Experian Payments Gateway Server service on Windows:
To increase the memory of a client machine or a server run as an applicaiton:
You should exercise caution when editing Registry settings and application configuration files.