Ora-12801 Error Signals
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Ora-12801 Error Signaled In Parallel Query Server P001
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Ora-12801 Error Signaled In Parallel Query Server P008
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 ability to process massive sums of ora 12801 error signaled in parallel query server p007 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 is an Oracle error that has some confusing ora-12801 error signaled in parallel query server p004 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 duplicate the number of disks or computers that the operation is used across, and set that as you
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Ora 12801 Error Signaled In Parallel Query Server P003
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Ora-12801: Error Signaled In Parallel Query Server Pz99
in General Database Discussions All PlacesDatabaseGeneral Database Discussions This discussion is archived 6 Replies Latest reply on Jun 11, 2012 10:41 PM by 735967 ORA-12801: error https://www.tekstream.com/resources/ora-12801-error-signaled-in-parallel-server/ signaled in parallel query server P081 735967 Jun 11, 2012 9:42 PM Hi All, Please suggest me appropriate resolution for this below error Select statement : select * from v_putaway where lot_no=91245 and flag_selected=0 Error Faced : ORA-12801: error signaled in parallel query server P081 ORA-01722: invalid number Oracle : 11.2.0.3 OS : https://community.oracle.com/thread/2402635 RHEL 5.4 Thanks I have the same question Show 0 Likes(0) 44835Views Tags: none (add) ora-12801Content tagged with ora-12801 This content has been marked as final. Show 6 replies 1. Re: ORA-12801: error signaled in parallel query server P081 sybrand_b Jun 11, 2012 9:57 PM (in response to 735967) lot_no is a varchar2 column and Oracle translates your query to select * from v_putaway where to_number(lot_no)=91245 and flag_selected=0 It fails as you have data problems. Solution: cleans your data, and after cleansing correct the datatype. ------------- Sybrand Bakker Senior Oracle DBA Like Show 0 Likes(0) Actions 2. Re: ORA-12801: error signaled in parallel query server P081 735967 Jun 11, 2012 10:11 PM (in response to sybrand_b) Hello sybrand_b, Thanks for the quick response, can I suggest to change the lot_no column to number? Thanks Like Show 0 Likes(0) Actions 3. Re: ORA-12801: error signaled in parallel query server P081 sb92075 Jun 11, 2012 10:14 PM (in resp
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this (names changed to protect the innocent, etc.) CREATE TABLE lookup_table AS SELECT destn, studref, min(pi) pi fROM ( SELECT pct1.DES as container_type ,pc1.ID as pi ,pc1.SPN as pn ,pct2.DES as Desc2 ,pc2.DES as studref ,pct3.des as desc3 ,pc3.dest_code as destn FROM container pc1 ,element e1 ,container_type pct1 ,element e2 ,container pc2 ,container_type pct2 ,element e3 ,container pc3 ,container_type pct3 WHERE pc1.CONTAINER_TYPE_ID = 3 AND e1.CONTAINER_ID = pc1.id AND pct1.ID = pc1.CONTAINER_TYPE_ID AND e2.id = e1.PARENT_ID AND pc2.ID = e2.CONTAINER_ID AND pct2.id = pc2.CONTAINER_TYPE_ID AND e3.id = e2.PARENT_ID AND pc3.ID = e3.CONTAINER_ID AND pct3.id = pc3.CONTAINER_TYPE_ID ) pages GROUP BY destn, studref ; which when executed gave the following error: CREATE TABLE lookup_table * ERROR at line 1: ORA-12801: error signaled in parallel query server P030 ORA-01652: unable to extend temp segment by 128 in tablespace TEMP Now of course my first reaction was "get the TEMP tablespace extended" but it had already just been extended to 8GB (made up of 4 tempfiles). So what could be causing the issue? The first thing I did was to run an explain plan on the query, as my suspicion was that the joins were perhaps going to be hash joins, which can make heavy use of the TEMP tablespace if the hash can't be built in memory (defined by the HASH_AREA_SIZE parameter). The explain plan looked like this: SQL> SELECT PLAN_TABLE_OUTPUT FROM TABLE(DBMS_XPLAN.DISPLAY()); PLAN_TABLE_OUTPUT ---------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------- | Id | Operation | Name | Rows | Bytes | Cost | TQ |IN-OUT| PQ Distrib | ---------------------------------------------------------------