Named Cache Configuration

For SAP ASE systems, consider setting up a 4 KB pool for the default data cache. SAP ASE writes I/O to the log more often in 4 KB increments than in 2 KB increments (the default). You can set up a 4 KB I/O pool using sp_poolconfig, but you must restart the server to enable the 4 KB I/O writes to the log. Set the pool up as a smaller subset of the cache.

Note: Be careful when making changes to the data caching systems in SAP ASE. Monitor your changes with SQL Monitor or sp_sysmon to ensure that the changes you make do not starve the 2 KB I/O pool or other caches.

The following shows the recommended size of the 4 KB I/O pool for small, medium, and large servers:

Server Size	Data Cache Size	4 KB I/O Pool Size
Small	128 MB	4 MB
Medium	512 MB	6 MB
Large	1 GB	10 MB