Hi,
I administer a SAP GRC system, running on Linux x86_64 with Oracle 11.2.0.2.0.
Sincer November 2012, we have the following problem:
The database connections get dried up. Meaning that the number of OS processes with LOCAL=NO is increasing until in reaches the maximum allowed connections and as the connections are not closed, the system hangs. At this point we restart the system and all the connections get released.
This issue occured at first once every two weeks. But for more than a month now, once the system is restarted, the number of connections increases immediately without being released and we need to restart the system again and again every 2 or 3 days in order to release connections and get a functional system at least for a while.
At first, we increased the parameter "processes" from 150 to 300. And Max Connections also to 300. Even though we increase the number of processes and sessions, they still get dried up after a while; so it just delays a bit the inevitable.
We opened a sap call at GRC category, and so far, it does not seem to be a problem related to the GRC application side. They haven't figured anything wrong.
From the database perspective we tried switching from dedicated server processes to shared server processes. But this resulted in a similar issue. Even though there are no more LOCAL=NO processes, after a while, the system gives a timeout when we try to log in and a restart is again needed.
Have you ever encountered a similiar issue, or do you have any suggestions what else to try?
Thank you,
Delia