How to purge the cache daily

Question

Hi all,
I have a simple question: Cause my ETL load data every morning, I'd like purge my cache with the same frequency, so the users can get fresh data in the reports.
Is there any procedure or variable in the configuration files to do that automatically?
Thanks,
Nazza

Answer 1

lets look at all your questions one by one
As the event polling table gets a row added for each table whose data is updated at the end of each ETL run, when exactly does the BI server purges cache related to that table - As soon as the polling happens and it finds a new record in your table
Lets say I set up a polling frequency (in Tools -> Utilities -> Oracle BI Event Tables) to every 60 minutes. At the end of every 60 minutes does the BI server restart by itself or does the polling take place without restart. - Polling takes place only when the server is up (there is no need to restart)
At the end of every 60 minutes does the BI server poll the event polling table whether or not any new rows are added to it? -(Yes )
What exactly happens when a new record is added to the event polling table in the database. - (The cache is purged )
If at the end of the ETL run data in 3 tables has changed, would 3 records be added to the event polling table in the database. - (yes , after the polling happens)
Let me know if you have more questions ...
Another way you can set it up is to create a batch file which would purge a table as its updated (use a procedure to capture the tables which have a value of 1 for update_type or use triggers to populate a table with these table names ) ...once purged you can set up your cache by using ibots (use javascripts) .