ORA-12805: parallel query server died unexpectedly

Hi,

Sometimes you can get  ” ORA-12805: parallel query server died unexpectedly ” error.

 

Details of error are as follows.

ORA-12805: parallel query server died unexpectedly

Cause: A parallel query server died unexpectedly, PMON cleaning up the process.
Action: Check your system for anomalies and reissue the statement. If this error persists, contact Oracle Support Services. See trace file for more details.

 

If you got this error with ORA-07445 [qertqistart] or ORA-600 [15803] in Oracle 12.1.0.2, this was related with bug 25694206 and it is corrected in version 12.2.0.2.

 

To solve this error, Upgrade database from 12.1.0.2 to 12.2 or run the following command for workaround.

SQL> alter system set "_px_wif_extend_distribution_keys"=false scope=both sid='*';

System altered.

 

 

If this error is not get with ORA-600 then you can solve it to run the following command.

SQL> ALTER SESSION SET PARALLEL_FORCE_LOCAL=TRUE;

Session altered.

Or you should Increase the  sort_area_size as follows.

SQL> show parameter sort_area

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
sort_area_retained_size integer 0
sort_area_size integer 65536
SQL>



alter session set sort_area_size = 640000 scope=both sid='*';

 

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

https://ittutorial.org/oracle-database-19c-tutorials-for-beginners/

 697 views last month,  3 views today

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 mehmetsalih.deveci@outlook.com. -                                                                                                                                                                                                                                                 - Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS ve linux Danışmanlık ve Eğitim için  mehmetsalih.deveci@outlook.com a mail atabilirsiniz.

Leave a Reply