Link to home
Start Free TrialLog in
Avatar of janoxley
janoxleyFlag for United Kingdom of Great Britain and Northern Ireland

asked on

Max Open Cursors in Oracle SQL developer.

Hi,
     I've been using Oracle SQL developer for about 5 months, i'm new to oracle so there is probably a thousand things i'm doing wrong however one thing that is a constant pain is getting the "Maximum Open Cursors Exceeded" error message.

   I get this error when i've been in a session for a while and have been opening tables, switching between views etc (basically just using the thing)

  I have to then end the application and reopen it which, when you're in the middle of something is a huge pain.

  So, my question.

  What IS all this max open cursors stuff?
  Why does it happen?
  How can i stop  it happening?

  As i said, i'm new to all this oracle stuff and am trying to be extra diplomatic with the DBAs so as not to annoy them too much so i don't really want to be constantly asking them questions (hence coming here!)

  Cheerrs
Avatar of Guy Hengel [angelIII / a3]
Guy Hengel [angelIII / a3]
Flag of Luxembourg image

in short:
http://ora-01000.ora-code.com/
ORA-01000:      maximum open cursors exceeded
Cause:      A host language program attempted to open too many cursors. The initialization parameter OPEN_CURSORS determines the maximum number of cursors per user.
Action:      Modify the program to use fewer cursors. If this error occurs often, shut down Oracle, increase the value of OPEN_CURSORS, and then restart Oracle.

note: I am use SQL Developer also, and did not yet run into that issue...
Avatar of janoxley

ASKER

Hi,
Thanks for that but i'm not sure it's really answered my question.

As an example, I could double click on a table to view it's contents, then click "refresh" a good few times and then get that error even though i've only been clicking refresh.

If the problem is too many open cursors then how do i "close" them? Why does clicking refresh Open a cursor?

I'm rally new to all this so i apologise if i'm asking stupid questions...
I do actually use v 1.2 ... you might consider upgrading?
In your case I will as soon as possible download the latest version of
SQLDeveloper. It is a Java based product and there are a plenty of bugs.
Even new versions some times fail to execute ordinary selects. I use it
at the University for my students and last Saturday SQL*Developer (middle aged
version) fails to run SELECT  TO_CHAR(sysdate,'.....') FRom dual;
Radiculous!
Erstaunlich!
As every Java product it looses control over the opened connections and threads.
So go ahead to the new version!
Ok, I've installed that. I'll see how i get on.
Nope, it's still happening...

What more info should i provide?
ASKER CERTIFIED SOLUTION
Avatar of schwertner
schwertner
Flag of Antarctica image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Thank you...