Oracle Ora-12801 Error Signaled In Parallel Query Server P000
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software is its ability to process massive sums of information into a multitude of tables and functions. The downside is that in any system, dealing with huge amounts of data can naturally carry some headaches and frustration along the way. The ORA-12801 would most easily fall into this category, an Oracle error emanating most often in response to errors when processing large jobs. ora-12801 error signaled in parallel query server p003 instance The Problem The ORA-12801 is an Oracle error that has some confusing origins, but is described as an error resulting in some form from a parallel query server. The error frequently accompanies another error, often the ORA-01652 (which concerns an inability to extend the temp segment in a tablespace). The ORA-12801 is essentially a general error, a sort of catchall for parallel query issues. At this juncture, some of you may be wondering yourselves, “What is a parallel query?” First showing up in later versions of Oracle7, a parallel query option lets multiple processes request and receive data and perform operations at the same time. As you would imagine, this can greatly enhance the speed of the system. To achieve this kind of efficiency, there are several conditions for the parallel query that require attention. So what are those conditions and how do they pertain to resolving an ORA-12801 error? The Solution An absolutely crucial element in successful parallel query operation is the appropriate use of query slaves. If too few or too many are put to use, the system will receive little advantage
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Ora-12801 Error Signaled In Parallel Query Server P006
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Ora-12801: Error Signaled In Parallel Query Server P010
is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up ORA-12801: error signaled in parallel query server P004 and ORA-01555: snapshot too old https://www.tekstream.com/resources/ora-12801-error-signaled-in-parallel-server/ up vote 0 down vote favorite I am executing a insert into ... select ... from ... where ... SQL and got following error using Oracle: java.sql.SQLException: ORA-12801: error signaled in parallel query server P004 ORA-01555: snapshot too old: rollback segment number 32 with name "_SYSSMU32_2039035886$" too small I read the following doc: http://www.dba-oracle.com/t_ora_12801_parallel_query.htm and http://www.dba-oracle.com/t_ora_01555_snapshot_old.htm Saying ORA-12801 is caused by no enough processors to support parallel query. ORA-01555 http://stackoverflow.com/questions/29579352/ora-12801-error-signaled-in-parallel-query-server-p004-and-ora-01555-snapshot error relates to insufficient undo storage or a too small value for the undo_retention parameter. But how can I check related parameters to avoid such issue recur? sql oracle oracle11g oracle10g share|improve this question asked Apr 11 '15 at 15:04 coderz 1,59541433 add a comment| 1 Answer 1 active oldest votes up vote 3 down vote accepted From the manual: ORA-12801: error signaled in parallel query server string Cause: A parallel query server reached an exception condition. Action: Check the following error message for the cause, and consult your error manual for the appropriate action. This is a generic error message and almost never has anything to do with not enough processors. This is an example of how the site you linked to often contains lots bad or outdated information. Maybe 17 processes was "a lot" 17 years ago, but it's not today. Unfortunately, that site is often the first result from Google. You can check the UNDO retention, which is the amount of time in seconds, like this: select value from v$parameter where name = 'undo_retention' Once again, see the manual for more information on the parameter. share|improve this answer answered Apr 11 '15 at 21:08 Jon Heller 17.3k32562 add a comment| Your Answer draf
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Operation. Query Failing: SELECT COUNT(*) FROM SALES_MASTER_HISTORY WHERE TREASURYNUMBER < 20000; ORA-12801: error signaled in parallel query server P001 ORA-01722: invalid number When i check degree on this table it was set to 1 so no problem found there but degree with above table indexes was set to 4. I changed the degree to 1 to sort first issue as below: SQL> SQL> select owner,table_name,degree from dba_tables where table_name in ('SALES_MASTER_HISTORY'); OWNER TABLE_NAME DEGREE ------------------------------ ------------------------------ ---------- CAP SALES_MASTER_HISTORY 1 SQL> select index_name,degree from dba_indexes where table_name in ('SALES_MASTER_HISTORY'); INDEX_NAME DEGREE ------------------------------ ---------------------------------------- IDX_TMH_NETTEDBOOKINGREF 4 IDX_VALUEDATE 4 PK_TRADES_MASTER_HISTORY 4 IDX_TMH_CORESYSREF 4 IDX_TMH_TRUNC_BOOKEDDATE_IDX 4 IDX_TMH_BRANCH_CODE 4 IDX_TMH_CUSTOMER_NUMBER 4 IDX_TMH_BROKERCODE 4 IDX_BOOKEDDATE 4 IDX_TMH_CONTRACTNUMBER 4 IDX_TMH_CUSTOMER 4 11 rows selected. SQL> alter index CAP.IDX_BOOKEDDATE parallel 1; Index altered. SQL> alter index CAP.IDX_TMH_BRANCH_CODE parallel 1; Index altered. SQL> alter index CAP.IDX_TMH_BROKERCODE parallel 1; Index altered. SQL> alter index CAP.IDX_TMH_CONTRACTNUMBER parallel 1; Index altered. SQL> alter index CAP.IDX_TMH_CUSTOMER_NUMBER parallel 1; Index altered. SQL> alter index CAP.IDX_TMH_NETTEDBOOKINGREF parallel 1; Index altered. SQL> alter index CAP.IDX_VALUEDATE parallel 1; Index altered. SQL> alter index CAP.PK_TRADES_MASTER_HISTORY parallel 1; Index altered. SQL> alter index CAP.IDX_TMH_TRUNC_BOOKEDDATE_IDX parallel 1; Index altered. SQL> select owner,index_name,degree from dba_indexes where table_name in ('SALES_MASTER_HISTORY') order by INDEX_NAME; OWNER INDEX_NAME DEGREE ------------------------------ ------------------------------ ---------------------------------------- CAPFX IDX_BOOKEDDATE 1 CAPFX IDX_TMH_BRANCH_CODE 1 CAPFX IDX_TMH_BROKERCODE 1 CAPFX IDX_TMH_CONTRACTNUMBER 1 CAPFX IDX_TMH_CORESYSREF 1 CAPFX IDX_TMH_CUSTOMER 1 CAPFX IDX_TMH_CUSTOMER_NUMBER 1 CAPFX IDX_TMH_NETTEDBOOKINGREF 1 CAPFX IDX_TMH_TRUNC_BOOKEDDATE_IDX 1 CAPFX IDX_VALUEDATE 1 CAPFX PK_TRADES_MASTER_HISTORY 1 After that when i execute query it was giving just : SQL> select count(*) FROM SALES_MASTER_HISTORY WHERE TREASURYNUMBER < 20000; select count(*) FROM SALES_MASTER_HISTORY WHERE TREASURYNUMBER < 20000 * ERROR at line 1: ORA-01722: invalid number This is not really a database problem, here problem is TREASURYNUMBER is char(8) and when we compare it with number it causing implicit datatype conversion whi