How to inclease open_cursors in oracle?

Hi, someone give me hands,please.
I want to change oracle parameter "open_cursors" from default value of it.
Where is init.ora file in oracle 10g database?
Let me know.

You can't have my hands, and it sounds like you should probably talk to the person who set the system up, if that is an option. This is probably one of the most basic of database administration tasks. If you don't know how to do this, you probaby shouldn't be working on a production system (assuming you are).
Second, you probably want to make sure you really need to do this. The default value is 50 cursors per session. Not for the whole instance, that's for each session. Does your application really need to hold more than 50 cursors open in each database session? Or is it leaking cursors (as I suspect)?
If you truly must change this value, try this while logged into SQL*Plus as SYSDBA:
SQL> alter system set open_cursors=<new_value> scope=both;
If that works, you are using SPFILE, which means that the initialization parameters are dynamically managed.
If that returns "ORA-32001: write to SPFILE requested but no SPFILE specified at startup" then you are using init<sid>.ora files. You may have a file in $ORACLE_HOME/dbs (Linux/Unix) or in %ORACLE_HOME\database (Windows) called init<SID>.ora. If that is present, you can change the value for open_cursors by adding a line to that file or changing any existing setting to look like:
open_cursors=<new_value>
Regards,
Jeremiah Wilton
ORA-600 Consulting
Recovery - Services - Seminars
http://www.ora-600.net
http://oradeblog.blogspot.com

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