Error 12801
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ora 12801 error Parallel query error ORA-12801 Oracle Database Tips by Burleson ConsultingOra 12801 Error Signaled In Parallel Query Server P003
Question: When running Oracle parallel query, I get a sporadic error like this: ERROR: ORACLE execute error: ORA-12801: error ora 12801 error signaled in parallel query server p011 signaled in parallel query server P017 ORA-01652: unable to extend temp segment by 314 in tablespace TEMP. I understand the ORA-01652 as being caused by running out of space, but I do not understand the ora 12801 error signaled in parallel query server p002 ORA-12801. Answer: Wow, P017, that's a lot of parallel query processes. Just make sure that you have enough processors to support this load. I've seen this ORA-12801 error pop-up intermittently for no apparent reason, usually when the server is especially active, and it's always the second message (in your case, ORA-01652). MOSC note 184416.1 has details on diagnosing the ORA-12801 error. It notes that the ORA-12801 is somewhat generic and
Ora 12801 Error Signaled In Parallel Query Server P004
that you should look for more details in your alert.log or in trace files in the USER_DUMP_DEST or BACKGROUND_DUMP_DEST location. You can set event 10397 to get more details: ORA-12801, 00000, "error signaled in parallel query server %s" 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. *Comment: This error can be turned off with event 10397, in which case the server's actual error is signaled instead. In any case, the central question is why your parallel query was performing a sort, resulting in the ORA-01652 error? OPQ generally sorts as the final step, after the paralel processes have returned the result set to the parallel query coordinator (usually P00).The symptom solution, of course, is to increase the size of your TEMP tablespace, or better still, increase your sort_area_size. If this job is running batch, you can do this with an alter session command, as this this case, to one gig: alter session set sort_area_size = 1,048,576,000 If you like Oracle tuning, see the book "Oracle Tuning: The Definitive Reference", with 950 pages of tuning tips and scripts. You can buy it direct from the publisher for 30%-off and get instant access to the code
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Ora 12801 Error Signaled In Parallel Query Server P001 Oracle
Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up ORA-12801: error signaled http://www.dba-oracle.com/t_ora_12801_parallel_query.htm in parallel query server P004 and ORA-01555: snapshot too old 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$" too small I read the following doc: http://www.dba-oracle.com/t_ora_12801_parallel_query.htm and http://stackoverflow.com/questions/29579352/ora-12801-error-signaled-in-parallel-query-server-p004-and-ora-01555-snapshot http://www.dba-oracle.com/t_ora_01555_snapshot_old.htm Saying ORA-12801 is caused by no enough processors to support parallel query. ORA-01555 error relates to insufficient undo storage or a too small value for the undo_retention parameter. But how can I check related parameters to avoid such issue recur? sql oracle oracle11g oracle10g share|improve this question asked Apr 11 '15 at 15:04 coderz 1,57641333 add a comment| 1 Answer 1 active oldest votes up vote 3 down vote accepted From the manual: ORA-12801: error signaled in parallel query server string Cause: A parallel query server reached an exception condition. Action: Check the following error message for the cause, and consult your error manual for the appropriate action. This is a generic error message and almost never has anything to do with not enough processors. This is an example of how the site you linked to often contains lots bad or outdated information. Maybe 17 processes was "a lot" 17 years ago, but it's not today. Unfortunately, that site is often the first result from Google. You can check the UNDO retention, which is the amount of time in seconds, like this: select value from v$parameter where name = 'undo_retention' Once again
parallel query Options richagupta View Member Profile Jun 29 2014, 09:46 PM Post #1 Newbie Group: Members http://dbaforums.org/oracle/index.php?showtopic=23234 Posts: 1 Joined: 29-June 14 Member No.: 49,740 Hi ,I am new http://www.orafaq.com/forum/t/3436/ to this forum. Please correct me if I do not follow the etiquette of posing questions here. I am struggling with an issue which I am unable to root cause. There is a procedure in my database (Version 11g) which is invoked by a UNIX shell script. This shell script is invoked ora 12801 by TIDAL job when the dependencies are fulfilled. While executing the shell script I get the following error.ERROR at line 1:ORA-12801: error signaled in parallel query server P010, instanceg4u2115c:SCDEP2 (2)ORA-08103: object no longer existsORA-06512: at "IPD.SUM_STADS_I_U_RESELLER_SALES", line 170ORA-06512: at line 1Interestingly the job has been failing alternatively. It fails on Say 24 June and is successful on 25 June. Attached is a snapshot of execution ora 12801 error history. I have an extensive log file for each run but I don't want to clog the space at the outset. Please let me know what could be root cause and what more information I can dig in to help identify the problem here. Note : There are only 2 instances (Between 10 June and 29 June) when we have seen ORA-12801:.Other than that the error seen is ORA-08103: (Object no longer exists)Jun 24 14:53 sum_stads_sql.12130.log - FailedJun 25 13:47 sum_stads_sql.22092.log - SuccessfulJun 26 14:49 sum_stads_sql.26527.log - FailedJun 27 12:25 sum_stads_sql.10669.log - SuccessfulThanks MuchRicha burleson View Member Profile Jun 29 2014, 10:19 PM Post #2 Advanced Member Group: Members Posts: 13,227 Joined: 26-January 04 Member No.: 13 Hi Richa and welcome to he forum!>> ORA-12801Here are my notes on the ORA-12801 error:http://www.dba-oracle.com/t_ora_12801_parallel_query.htm*******************************************************>> ORA-08103Looks like a bug:http://www.dba-oracle.com/t_ora_08103_obje...nger_exists.htm*******************************************************>> Interestingly the job has been failing alternatively.This smells like a bug. I would open an SR on MOSC:http://support.oracle.com Please let us know what they say! -------------------- Hope this helps. . . Donald K. BurlesonOracle Press authorAuthor of Oracle Tuning: The Definitive Reference Dashdorj_T View Member Profile Mar 30 2016, 08:17 PM Post #3 M
signaled in parallel query server P029 [message #9166] Fri, 24 October 2003 03:05 Anirban Messages: 3Registered: April 2003 Junior Member Hi, I am getting the following ORA error: ORA-12801: error signaled in parallel query server P029 ORA-01652: unable to extend temp segment by 128 in tablespace TS_TEMP I am inserting 200000 into a permanent table .In the select statement ,I join three tables each of them contains near about 500000 records.I use hash join and as well parallel(table,4,4).This query contains no group by and order by clause.My temp tablespace size is 16GB.What can be possible reason .It is very emergency. Report message to a moderator Re: ORA-12801: error signaled in parallel query server P029 [message #9168 is a reply to message #9166] Fri, 24 October 2003 05:17 fly Messages: 4Registered: October 2003 Junior Member Join is as well as an explicit ORDER BY so join may also run out of space of temp segment. But if you try it again sometime,there is no error without changing anything,you must consider to apply one patch. Report message to a moderator Re: ORA-12801: error signaled in parallel query server P029 [message #9169 is a reply to message #9168] Fri, 24 October 2003 05:54 Anirban Messages: 3Registered: April 2003 Junior Member Thanks but I am not using ORDER BY clause.Which patch you are talking about?Will you please give the information in detail? Report message to a moderator Re: ORA-12801: error signaled in parallel query server P029 [message #9170 is a reply to message #9169] Fri, 24 October 2003 06:32 fly Messages: 4Registered: October 2003 Junior Member the join action also use sort segment. You can increase sort_area_size and temp tablespace and try again. if whatever you increase TEMP tablespace,the error still exists,you must apply patch. You can search the number of the patch on metalink.oracle.com according the error. Report message to a moderator Re: ORA-12801: error signaled in parallel query server P029 [message #9172 is a reply to message #9166] Fri, 24 October 2003 08:11 Thiru Messages: 1089Regis