Connection pooling does not work Oracle Objects! Oracle please respond!

Question

The problem is that when we retrieve Oracle Objects using pooled connection (closing logical connection at the end of every call)it takes 6-8 times longer than in case we share the same physical connection for all database calls. Parts of our application which do not utilize Oracle Objects (just old good relational data) works just fine with pooled connections - no performance degradation
This is my reconstruction of f the what is happening behind the seen, so some parts can be not entirely correct.
OracleConnection class caches StructDescriptor objects in descriptorCache hash table. StructDescriptor objects map content of oracle STRUCTs which are retrieved through the connection onto oracle type names. For example if you retrieve an instance of HR.EMPLOYEE_T oracle object from database some metadata will be retrieved and stored as an entry in descriptorCache cache table associated with "HR.EMPLOYEE_T" key to assist CustomDatum interface. It is a time consuming process and caching of this metadata improves it dramatically.
Now when using pooled connection descriptorCache gets cleared when you close your logical connection (java.sql.Connection) so next time you get a connection from your pooled connection it will have to repopulate the cache which as I said is very time consuming. As a result even though we can reuse our physical connection by using pooled connection whole setup does not work - fetching metadata takes a long time and we cant use Oracle objects in EJB environment (or Servlet environment)
Alex Roytman
Peace Technology, Inc.
[phone]
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Answer 1

check out managed datasources in the manuals