Three questions regarding DB_KEEP_CACHE_SIZE and caching tables.

Folks,
In my Oracle 10g db, which I got in legacy. It has the init.ora parameter DB_KEEP_CACHE_SIZE parameter configured to 4GB in size.
Also there are bunch of tables that were created with CACHE turned on for them.
By querying dba_tables table , with CACHE='Y', I can see the name of these tables.
With time, some of these tables have grown in size (no. of rows) and also some of these tables are not required to be cached any longer.
So here is my first question
1) Is there a query I can run , to find out , what tables are currently in the DB_KEEP_CACHE_SIZE.
2) Also how can I find out if my DB_KEEP_CACHE_SIZE is adqueataly sized or needs to be increased in size,as some of these
tables have grown in size.
Third question
I know for fact, that there are 2 tables that do not need to be cached any longer.
So how do I make sure they do not occupy space in the DB_KEEP_CACHE_POOL.
I tried, alter table <table_name> nocache; statement
Now the cache column value for these in dba_tables is 'N', but if I query the dba_segments tables, the BUFFER_POOL column for them still has value of 'KEEP'.
After altering these tables to nocache, I did bounce my database.
Again, So how do I make sure these tables which are not required to be cached any longer, do not occupy space in the DB_KEEP_CACHE_SIZE.
Would very much appreciate your help.
Regards
Ashish

Hello,
1) Is there a query I can run , to find out , what tables are currently in the DB_KEEP_CACHE_SIZE:You may try this query:
select owner, segment_name, segment_type, buffer_pool
from dba_segments
where buffer_pool = 'KEEP'
order by owner, segment_name;
2) Also how can I find out if my DB_KEEP_CACHE_SIZE is adqueataly sized or needs to be increased in size,as some of these tables have grown in size.You may try to get the total size of the Segments using the KEEP BUFFER:
select sum(bytes)/(1024*10124) "Mo"
from dba_segments
where buffer_pool = 'KEEP';To be sure that all the blocks of these segments (Table / Index) won't be often aged out from the KEEP BUFFER, the total size given by the above query should be less than the size of your KEEP BUFFER.
I know for fact, that there are 2 tables that do not need to be cached any longer.
So how do I make sure they do not occupy space in the DB_KEEP_CACHE_POOL.You just have to execute the following statement:
ALTER TABLE <owner>.<table> STORAGE(BUFFER_POOL DEFAULT);Hope this help.
Best regards,
Jean-Valentin

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