Sometimes You can get “ORA-12602: TNS: Connection Pooling limit reached ” error.
Details of error are as follows.
ORA-12602: TNS: Connection Pooling limit reached
To avoid this problem, increase the number of initial dispatchers as follows:
Shutdown the Dispatcher using the following command
SQL> alter system shutdown immediate 'D001';
Later on add new dispatchers as follows:
SQL> alter system set DISPATCHERS = '(protocol=tcp)(dispatchers=10)';
Note : This syntax depends on the way the Dispatcher value is given in the init.ora or Spfile.ora
While increasing the DISPATCHERS value, also check shared servers ratio.
See the documents and notes on Shared Server configuration for these details.
Do you want to learn more details about RMAN, then read the following articles.
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