SET INDEX CACHE PRIORITY
SET INDEX CACHE PRIORITY ( aField ; priority )
| Parameter | Type | Description | |
|---|---|---|---|
| aField | Field | → | Field whose index(es) priority value has to be set for the session |
| priority | Integer | → | Cache priority value for the field index(es) |
Expert mode
This command is reserved for specific needs. It must be used with care since it can affect database performance.
Description
The SET INDEX CACHE PRIORITY command sets a specific priority to the index(es) related to the aField in cache for all processes in the current session. This command should be called in the On Startup or On Server Startup database method.
Note: This command only works in local mode (4D Server and 4D); it cannot be used in 4D remote mode.
This command handles priority for all indexes related to the aField, including keyword indexes (composite indexes priority cannot be customized).
In the priority parameter, pass one of the following constants from the "Cache Management" theme:
| Constant | Comment |
|---|---|
| Cache priority low | |
| Cache priority very low | |
| Cache priority normal | Sets the cache priority to its default value |
| Cache priority high | |
| Cache priority very high |
Example
In the , you want to set a high priority for the [Customer]LastName field indexes:
SET INDEX CACHE PRIORITY([Customer]LastName;Cache priority very high)
See also
ADJUST INDEX CACHE PRIORITY
Get adjusted index cache priority
Properties
| Command number | 1401 |
| Thread safe | ✓ |