Ora 12801 Error Signaled In Parallel Query Server P004 Oracle
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error ORA-12801 Oracle Database Tips by Burleson Consulting Question: When running Oracle parallel query, I get a sporadic ora-12801 ora-01722 error like this: ERROR: ORACLE execute error: ORA-12801: 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
Ora-12801: Error Signaled In Parallel Query Server P008
caused by running out of space, but I do not understand the 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). ora-12801 error signaled in parallel query server p000 instance MOSC note 184416.1 has details on diagnosing the ORA-12801 error. It notes that the ORA-12801 is somewhat generic and 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
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Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community ora-12801 ora-01652 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 up vote 0 down http://www.dba-oracle.com/t_ora_12801_parallel_query.htm 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$" too small I read the following doc: http://www.dba-oracle.com/t_ora_12801_parallel_query.htm and http://www.dba-oracle.com/t_ora_01555_snapshot_old.htm Saying ORA-12801 is caused by no enough processors to support parallel query. ORA-01555 error relates to insufficient undo storage http://stackoverflow.com/questions/29579352/ora-12801-error-signaled-in-parallel-query-server-p004-and-ora-01555-snapshot or a too small value for the undo_retention parameter. But how can I check related parameters to avoid such issue recur? sql oracle oracle11g oracle10g share|improve this question asked Apr 11 '15 at 15:04 coderz 1,59541433 add a comment| 1 Answer 1 active oldest votes up vote 3 down vote accepted From the manual: ORA-12801: error signaled in parallel query server string Cause: A parallel query server reached an exception condition. Action: Check the following error message for the cause, and consult your error manual for the appropriate action. This is a generic error message and almost never has anything to do with not enough processors. This is an example of how the site you linked to often contains lots bad or outdated information. Maybe 17 processes was "a lot" 17 years ago, but it's not today. Unfortunately, that site is often the first result from Google. You can check the UNDO retention, which is the amount of time in seconds, like this: select value from v$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 draft saved draft discarded Sign up or log in Sign up using Goog
3:46 pm UTC Category: Database � Version: 8.1.7 Whilst you are here, check out some content from the AskTom team: PL/SQL arrays https://asktom.oracle.com/pls/asktom/f%3Fp%3D100:11:0::::P11_QUESTION_ID:1027523970333 the index datatype Latest Followup You Asked Tom, Suppose I have http://www.dbasupport.com/forums/showthread.php?42292-ora-12801-and-ora-01722-when-using-PARALLEL-hint enabled parallel query on one of the tables out of 50 in my application..Then if I query using a join between those tables (only one of them is parallel query enabled ) then would Oracle still use the parallel query when running that query. If error signaled not, is there something like a hint to make Oracle use the parallel query against that table. eg...EMP table with 1 million rows and parallel query enabled. DEPT with 1000 rows and parallel query NOT enabled. Then the following query will it use the parallel query on EMP table. Select * from EMP, DEPT WHERE emp.deptno error signaled in = dept.deptno; Thanks, Suresh and we said... Any operation that could be parallelized against that table in any query would be a condidate for parallelization (against that table) You can always add the parallel hint to the query. As for your question -- it might, it might not. Depends on what table is driving the query. If we full scan DEPT and index access EMP, no -- most likely a serial operation. If we full scan EMP and index access DEPT -- probably. If we full scan both, probably. Easy enough to see what'll happen (dbms_stats is great for this "what if" stuff) ops$tkyte@ORA817.US.ORACLE.COM> create table emp as select * from scott.emp where 1=0; Table created. ops$tkyte@ORA817.US.ORACLE.COM> create table dept as select * from scott.dept where 1=0; Table created. ops$tkyte@ORA817.US.ORACLE.COM> ops$tkyte@ORA817.US.ORACLE.COM> alter table dept add constraint dept_pk primary key(deptno); Table altered. ops$tkyte@ORA817.US.ORACLE.COM> alter table emp add constraint emp_fk foreign key(deptno) references dept; Table altered. ops$tkyte@ORA817.US.ORACLE.COM> create index emp_fk_idx on emp(deptno); Index created. ops$tkyte@ORA817.US.ORACLE.COM> ops$tkyte@ORA817.US.ORACLE.COM> ops$tkyte@ORA817.US.ORACLE.COM> exec dbms_stats.set_table_st
and ora-01722 when using PARALLEL hint If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Results 1 to 6 of 6 Thread: ora-12801 and ora-01722 when using PARALLEL hint Tweet Thread Tools Show Printable Version Email this Page… Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 04-06-2004,04:24 PM #1 samdba View Profile View Forum Posts Advisor Join Date Dec 2001 Location USA Posts 620 ora-12801 and ora-01722 when using PARALLEL hint Hi all, I am getting foll. error when using PARALLEL hint and works fine without the hint. ora-12801: error signaled in parallel query server P005 ora-01722: invalid number This error comes on the foll. line in SQL statement. AND papfa.person_id = DECODE(haaif.attribute3,NULL,papfss.person_id,TO_NUMBER(haaif.attribute3)) What could be the reason? Thanks in Adv. Sam ------------------------ To handle yourself, use your head. To handle others, use your heart Reply With Quote 04-06-2004,04:41 PM #2 slimdave View Profile View Forum Posts Visit Homepage Foreign Script Kiddie Join Date Aug 2002 Location Colorado Springs Posts 5,253 haaif.attribute3 contains strings that cannot be converted to numbers David Aldridge, "The Oracle Sponge" Senior Manager, Business Intelligence Development XM Satellite Radio Washington, DC Oracle ACE Reply With Quote 04-06-2004,04:52 PM #3 jmodic View Profile View Forum Posts Super Moderator Join Date Dec 2000 Location Ljubljana, Slovenia Posts 4,439 Originally posted by slimdave haaif.attribute3 contains strings that cannot be converted to numbers Most obvous answer. However: how come the same SQL executes fine without PARALLEL hint, as the original poster indicates (if this is actualy true)? It smells more as a bug to me, if what original poster states is true.... Jurij Modic ASCII a stupid question, get a stupid ANSI 24 hours in a day .... 24 beer in a case .... coincidence? Reply With Quote 04-07-2004,10:13 AM #4 samdba View Profile View Forum Posts Advisor Join Date Dec 2001 Location USA Posts 620 Folks, I figured it out. In one of the table, attribute3 column has 'NA' value in it, which it is not able to convert into number. So, I used DECODE and now it is n