4D v18
SET BLOBS CACHE PRIORITY
- 4D Language Reference
-
- Cache Management
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- Managing priorities in database cache
- ADJUST BLOBS CACHE PRIORITY
- ADJUST INDEX CACHE PRIORITY
- ADJUST TABLE CACHE PRIORITY
- Cache info
- FLUSH CACHE
- Get adjusted blobs cache priority
- Get adjusted index cache priority
- Get adjusted table cache priority
- Get cache size
- GET MEMORY STATISTICS
- SET BLOBS CACHE PRIORITY
- SET CACHE SIZE
- SET INDEX CACHE PRIORITY
- SET TABLE CACHE PRIORITY
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 | Longint |
|
Cache priority value for BLOBs in the table | |||||
This command is reserved for specific needs. It must be used with care since it can affect database performance.
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 |
In the , you want to set a high priority for the [Customer] table "blobs" data:
SET BLOBS CACHE PRIORITY([Customer];Cache priority very high)
ADJUST BLOBS CACHE PRIORITY
Get adjusted blobs cache priority
Product: 4D
Theme: Cache Management
Number:
1425
Created: 4D v16 R2
4D Language Reference ( 4D v18)
