Aging policy

Question

how can i define aging policy on any cache group?
my cache group consists of one table only.
I've followed these steps:
Command> call ttaginglruconfig (0.75,0.90,60);
< .7500000, .9000000, 60 >
1 row found.
Command>
Command>
Command> call ttaginglruconfig();
< .7500000, .9000000, 60 >
1 row found.
Command>
Command> call ttagingschedulenow ('tblradiuscdr');
2996: Cannot start aging on table without aging policy
The command failed.

Answer 1

Absolutely - time-based aging is covered in the Operations Guide under "Implementing aging in a cache group". Here's an example taken from the Create Cache Group section I mentioned before:
Example 5.47
Create a cache group with time-based aging. Specify AgeTimestamp as the column for aging. LIFETIME 2 hours, CYCLE 30 minutes. Aging state is not specified, so the default setting (ON) is used.
CREATE READONLY CACHE GROUP AgingCacheGroup
AUTOREFRESH
MODE INCREMENTAL
INTERVAL 5 MINUTES
STATE PAUSED
FROM
CUSTOMER (CustomerId NUMBER NOT NULL,
AgeTimestamp TIMESTAMP NOT NULL,
PRIMARY KEY (CustomerId))
AGING USE AgeTimestamp LIFETIME 2 HOURS CYCLE 30 MINUTES;
Command> describe customer;
Table USER.CUSTOMER:
Columns:
*CUSTOMERID                      NUMBER NOT NULL
AGETIMESTAMP TIMESTAMP (6) NOT NULL
AGING USE AgeTimestamp LIFETIME 2 HOURS CYCLE 30 MINUTES ON
1 table found.
(primary key columns are indicated with *)
With regard to adding time-based aging to a production system, the following points may be salient:
- For the time-based aging policy, you cannot add or modify the aging column. This is because you cannot add or modify a NOT NULL column.
- The aging policy cannot be added, altered, or dropped for an autorefresh cache group while the cache agent is active. Stop the cache agent first.