Limitations

If a named cache has only local configurations and objects bound to it, you cannot create a global cache configuration. You see error 19817. For example:
```
sp_cacheconfig 'SALES', '200M', 'instance SALES_INSTANCE'
go
sp_bindcache 'SALES','SALES_DB'
go
sp_cacheconfig 'SALES', '300m'
go
-------
Error 19817, "New configuration on cache 'SALES' is not permitted." 
```
To avoid this situation in the example above, unbind all objects bound to cache “SALES”. Create a new configuration for cache “SALES”, and bind the objects again.

If you manually edit the configuration file to include multiple configurations of a named cache, and start the coordinator, the coordinator accepts only the configuration relevant to the coordinator’s instance. For example:

[Named Cache: Sales]
	[Instance:SALES_INSTANCE]
		cache size = 100 M
		cache status - mixed cache
		cache replacement policy = DEFAULT
		local cache partition number = 2
		[Instance:HR_INSTANCE]
		cache size - 100M
		cache status = mixed cache
		cache replacement policy = DEFAULT

		local cache partition number = 2

[2K I/O Buffer Pool]
	[Instance:SALES_INSTANCE]
		pool size = 100 M
		wash size = 4765 K
		local async prefetch limit = DEFAULT
		[Instance:HR_INSTANCE]
		pool size - 75M
		wash size = 3577 K
		local async prefetch limit = DEFAULT

After you start instance SALES_INSTANCE, the server can see only information about the SALES_INSTANCE configuration. The server ignores HR_INSTANCE.

WORKAROUND: To avoid this situation, add configuration information before starting instance HR_INSTANCE.