ORA-02020: too many database links in use


You can get “ORA-02020: too many database links in use ” error during the drop any user.


Details of error are as follows.

ORA-02020: too many database links in use

Cause: The current session has exceeded the INIT.ORA open_links maximum.
Action: Increase the open_links limit, or free up some open links by committing or rolling back the transaction and canceling open cursors that reference remote databases.
select * from dual@DBL_MSD
ERROR at line 1:
ORA-02020: too many database links in use
Check the existing Database links as follows.
SQL>  select db_link,logged_on,open_cursors from v$dblink;



To solve this error, You should increase the open_links parameter as follows.

alter system set open_links=20 scope=spfile sid='*';
alter system set open_links_per_instance=20 scope=spfile sid='*';

Then restart database to activate this parameter as follows.
shutdown immediate;


If you don’t want to increase open_links because of restart database, then you can close the existing database links as follows.



SQL> alter session close database link Database_Link_Name;



Do you want to learn Oracle Database for Beginners, then read the following articles.


About Mehmet Salih Deveci

I am Founder of SysDBASoft IT and IT Tutorial and Certified Expert about Oracle & SQL Server database, Goldengate, Exadata Machine, Oracle Database Appliance administrator with 10+years experience.I have OCA, OCP, OCE RAC Expert Certificates I have worked 100+ Banking, Insurance, Finance, Telco and etc. clients as a Consultant, Insource or Outsource.I have done 200+ Operations in this clients such as Exadata Installation & PoC & Migration & Upgrade, Oracle & SQL Server Database Upgrade, Oracle RAC Installation, SQL Server AlwaysOn Installation, Database Migration, Disaster Recovery, Backup Restore, Performance Tuning, Periodic Healthchecks.I have done 2000+ Table replication with Goldengate or SQL Server Replication tool for DWH Databases in many clients.If you need Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS Consultancy and Training you can send my email adress [email protected].-                                                                                                                                                                                                                                                 -Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS ve linux Danışmanlık ve Eğitim için  [email protected] a mail atabilirsiniz.

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