Performance Settings
The performance group in the configuration tool controls the caching of data in SanteDB.
The services installed by default on SanteDB are:
REDIS Based Caching Services: These connect to the REDIS server and store objects in cache there. REDIS caching is useful in a scaled-out deployment where multiple application servers must share cached data between themselves.
Memory Based Caching Service: These are local in-process caches. This type of caching service is useful for single process or single application servers.
The caching control panel is broken into two sections:
Configuration Sections: Which are used to control the configuration of each class of caching, and
Services Section: Which is used to set the caching service/strategy used.
Services Configuration
The services section is used to to control the implementations of the caching infrastructure.
| Option | Description | Example |
|---|---|---|
Data Object Cache | The data object cache is used to store fully loaded objects from the database. This service reduces load on the database. | |
Ad-Hoc Cache | The ad-hoc cache is used to store any value which a plugin needs to store. These are typically used to cache policy decisions, policy information, term lookups, etc. | |
Stateful Query Cache | The stateful query cache is used to store stateful query results which are paginated on the client. Stateful queries are useful for freezing a result set to those at the time of query. |
Cache Configuration
REDIS Configuration
| Option | Description | Example |
|---|---|---|
REDIS Server(s) | The location of the REDIS server (or pool of servers) which should be used for caching. |
|
REDIS User | If the REDIS server requires authentication (recommended) the username to use to authenticate with the REDIS server. | |
Password | If the REDIS server requires authentication (recommended) the password which matches the username. | |
TTL | The Time To Live of objects stored in REDIS. Default is 15 minutes. |
|
Broadcast Messages | If true, then the SanteDB server will broadcast updates to the REDIS server cache objects so that other SanteDB servers are notified when data in the REDIS server changes. |
Memory Configuration
| Option | Description | Example |
|---|---|---|
Max Cache Size (MB) | The maximum amount of in-process memory to dedicate to caching objects. |
|
Max Cache Age (S) | The maximum length of time in seconds for cached objects to live in the cache before being evicted. | |
Max Query Age (S) | The maximum length of time (in seconds) for cached stateful queries to be retained before being evicted (note: callers must complete consumption of the query prior to this time) |
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