In some cases, your computer may generate an error indicating the 12801 error reported on the p004 parallel query server. This problem can be caused by a number of reasons. g.ORA-12801: Error in parallel query server P004 and also ORA-01555: snapshot too old. The ORA-12801 error can be caused by not having enough processors to handle parallel requests. The ORA-01555 error is related to insufficient memory for undo or too low cost of the undo_retention parameter.
One of the greatest advances in Oracle database software is its ability to manipulate huge amounts of information in this multitude of tables and functions. The negative aspects of any system handling huge amounts of data can of course cause headaches and frustration. ORA-12801 most easily falls into this category, it is an Oracle error that is almost common in response to errors when doing large jobs.
Fortunately, while ora-12801 is an unclear Oracle bug, it has been described as a concurrent query system bug. An error that is often accompanied by another error, usually ORA-01652 (which concerns the inability to expand a temporary segment in an incredible tablespace). ORA-12801 is generally an error of any kind, a kind of collective term for concurrent dilemma problems.
At this point, you might be wondering, “What is a synchronized request?” Parallel query option, first appearing in subsequent choicesora Oracle7, allows multiple processes to request and receive data during operations. As you can imagine, this can significantly increase the speed of the system. To achieve this efficiency, different conditions must be met for a parallel query. So what are these conditions and how are they related to fixing a big mistake?
An absolutely critical detail for a successful parallel query operation is the correct use of the query slaves. Even if too little or too much is used to help you use it, the system will benefit little from their presence. In general, a good way to keep track of is to double the number of most hard drives or computers that will almost certainly use the operation, and set this as a specific number of parallel query slaves. In addition, the table should take into account parallel questions. Perform a full table scan, usually evaluating the timing of the various parameters for our degree of parallelism function to determine which variable size is best for your performance.
Due to the nature of ORA-12801, it is recommended that you investigate the error in more detail. The event is set to 10397 to collect information about the error (including cause, action, and some direct feedback). You can also track songs in BACKGROUND_DUMP_TEST and USER_DUMP_TEST for more details on packages, as well as in your alert.log. Typically, in the event of an error, you will get the parallel query server number, which is likely to give an idea of how many measurements were taken in your business. Combined with a bug such as ORA-01652, someone can usually increase the size of the sort_area_size or TEMP tablespace so that the job can run efficiently.
However, avoiding ORA-12801 can be tricky. If you and your family are familiar with concurrent query problems and the basics of learning about your favorite system, you should be fine. If you keep track of concurrent requests and ensure that the workstation is assigned the correct number of slave degree variables anddining table, you can avoid this mistake (and several others). Also, by referring to your alert.log and dump events from time to time, you can determine the reasons for a potential crash, or select additional information about an impending crash, which can be confusing as ORA-12801 can still trigger you. It doesn’t hurt to get an experienced Oracle consultant to help you with any issues and optimize your experience with Oracle products.
AloneOne of the greatest advances in Oracle database software is its ability to process huge amounts of information in a real set of tables and functions. The weakness of any system is processing huge amounts of data, which, of course, can cause headaches and frustration. ORA-12801 falls into this category the easiest, it is an Oracle bug, which mainly occurs as a reaction to errors when submitting large jobs.
Ora-12801 is an Oracle bug that is of obscure origin, but is nevertheless described as being caused by some form of parallel computer query on the Internet. Error The error often accompanies another error, most likely ORA-01652 (which is related to the inability to expand the temporary segment in certain tablespaces). ORA-12801 is, in fact, a general and special error, a kind of collective term for parallel analysis tasks.
Here, some of you are right in asking, “What is an equivalent query?” First, the parallel query option appears in later versions of Oracle7, where severalprocesses request and receive data or perform operations at the same time. As you can imagine, the speed of the system can be significantly increased. To achieve this efficiency, a concurrent query must satisfy a large number of conditions. What are these terms and how should they be considered when troubleshooting ORA-12801 errors?
An absolutely critical element of a successful parallel query operation is the correct use of query slaves. Even if only a few or too many are used, the system will get a few positives from their presence. In general, a good way to follow is to duplicate the number of disks or computers on which the operation is likely to be used and designate them as any number of parallel query slaves. Also, your separate tables should accommodate the parallel idea. Perform a full table analysis to generally evaluate the timing of the various parameters for the unambiguous degree of the parallel function to determine which type of variable timesthe measure is best for your job.
Since they are consistent with the nature of ORA-12801, it is recommended that you continue to investigate the error. The event occurred on 10397 while collecting information about the malfunction (including cause, action, and some direct feedback). You can also view the tracking computer data files in BACKGROUND_DUMP_TEST and USER_DUMP_TEST for new details, as well as in your alert.log. Usually with an error you get the number of the parallel problem server, which gives an idea of how many processes are running. If this happened with an error such as ORA-01652, your needs can usually increase the size of your own sort_area_size or TEMP tablespace so that the job can run efficiently.
Avoiding the wonderful ORA-12801 can be tricky, but if you know your parallel query plans and understand the basics of learning about these systems, you should be fine. Full control over concurrent requests and making sure the experts are talking about the correct number of subordinates and bedside variables assigned to the contract canhelp a lot to avoid this error (and some others). In addition, by referring to your alert.log from time to time, you can perform medical tests to find the cause of potential errors, or to get additional information about an unfinished error that experts may confuse. If your business encounters common system bugs, such as mainly ORA-12801, that are still massively popular, it may not hurt to contact an Oracle consultant to help you with some issues and share his experience with Oracle optimization products.Speed up your computer today with this simple download.
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