Listener on port 1521 is slow on Oracle 10g
I'm not a DBA, so my knowledge about Oracle is limited.
I have a software that turn very good on Oracle 8, 9, and when i've installed Oracle 10g on a server and imported my database on this server, my soft become very slow. I've search a long time about this problem, i've tried to analyse where the time was spent during the connection of my soft, but no process turn espacially.
The solution i found was to change my listener port from 1521 (default) to 1526, and tnsnames of my client, and since it's ok !
My question is why ? I don't understand this problem !