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Performance issue in multi-level Oracle Object/thin JDBC Options Options

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Hi All,

We are trying to call Oracle 9i Stored Procedure with ThinJDBC, the
parameter in Stored procedure is multilevel object:

Table of Object1
+------- Object1
+------ Table of Object2
+------ Object2
+----- attribute in
simple oracle types, such as varchar.

The query for that call is very light way, just get two records from
hundred records table. But the whole execution time is around 600ms

If we change to one level Oracle Object

+---- Object
+------- attributes

with the same query data, the execution time is around 100 ms.

I am wondering where to start to troubleshoot the performance
500 ms is not acceptable in the production environment.

We checked the stored proc elapse time, very minimum, less than 10 ms.
So seems most of the time is in JDBC side. Any suggestion to
troubleshoot JDBC performance issue?

Thanks in advance.

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