SET BLOBS CACHE PRIORITY
SET BLOBS CACHE PRIORITY ( aTable ; priority )
| Parameter | Type | Description | |
|---|---|---|---|
| aTable | Table | → | Table whose "blobs" data priority value has to be set for the session |
| priority | Integer | → | Cache priority value for BLOBs in the table |
Expert mode
This command is reserved for specific needs. It must be used with care since it can affect database performance.
Description
The SET BLOBS CACHE PRIORITY command sets a specific priority to the "blobs" data related to aTable 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.
"Blobs" data field types include BLOB, text, picture, and object. This command handles priority for such data when they are stored in the data file only.
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] table "blobs" data:
SET BLOBS CACHE PRIORITY([Customer];Cache priority very high)
See also
ADJUST BLOBS CACHE PRIORITY
Get adjusted blobs cache priority
Properties
| Command number | 1425 |
| Thread safe | ✓ |