Oracle Error Signaled In Parallel Query Server
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Ora-12801 Error Signaled In Parallel Query Server P001
Services Candidate Registration Technical Focus Client Opportunities Support Solutions Training Legacy to error signaled in parallel query server invalid number Oracle WebCenter Oracle Documents Cloud Service Next Generation AP Automation & Dynamic Discounting Oracle WebCenter Contract Lifecycle Management (CLM) Search ora-12801: error signaled in parallel query server p008 ORA-12801: error signaled in parallel query serverYou are here: Home / Resources / ORA-12801: error signaled in parallel query server ORA-12801 One of the greatest achievements of Oracle database software is its
Ora 12801 Error Signaled In Parallel Query Server P007
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. The Problem The ORA-12801
Ora-12801 Error Signaled In Parallel Query Server P004
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 from their presence. Generally, a good rule to follow is du
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Question: When running Oracle parallel query, I get a sporadic error like this: ERROR: ORACLE execute error: ORA-12801: ora-12801 error signaled in parallel query server p000 instance error 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 https://www.tekstream.com/resources/ora-12801-error-signaled-in-parallel-server/ 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 http://www.dba-oracle.com/t_ora_12801_parallel_query.htm 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
here for a quick overview of the site Help Center Detailed answers to any questions you might have http://stackoverflow.com/questions/29579352/ora-12801-error-signaled-in-parallel-query-server-p004-and-ora-01555-snapshot Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, error signaled 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 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 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 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 of