Oracle 4031 Error
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» ORA-4031 Troubleshooting By user706992 on Jun 11, 2010 QUICKLINKS: Note 4031.1 OERR: ORA 4031 (Known Issues) Note 396940.1 Troubleshooting and Diagnosing ORA-4031 Error Diagnostic Tool for ora-4031 unable to allocate ORA-4031 Note 1087773.1 ORA-4031 Diagnostics Tools [Video] Have you observed anORA-04031 error ora 04031 oracle 11g r2 reported in your alert log? An ORA-4031 error is raised when memory is unavailable for use or reuse ora 04031 unable to allocate 4096 bytes of shared memory in the System Global Area (SGA). The error message will indicate the memory pool getting errors and high level information about what kind of allocation failed and how much ora 4031 streams pool memory was unavailable. The challenge with ORA-4031 analysis is that the error and associated trace is for a "victim" of the problem. The failing code ran into the memory limitation, but in almost all cases it was not part of the root problem. Looking for the best way to diagnose? When an ORA-4031 error occurs, a trace file is
Dde: Problem Key 'ora 4031' Was Completely Flood Controlled (0x6)
raised and noted in the alert log if the process experiencing the error is a background process. User processes may experience errors without reports in the alert log or traces generated. The V$SHARED_POOL_RESERVED view will show reports of misses for memory over the life of the database. Diagnostics scripts are available in Note 430473.1 to help in analysis of the problem. There is also a training video on using and interpreting the script data Note 1087773.1. 11g Diagnosibility Starting with Oracle Database 11g Release 1, the Diagnosability infrastructure was introduced which places traces and core files into a location controlled by the DIAGNOSTIC_DEST initialization parameter when an incident, such as an ORA-4031 occurs. For earlier versions, the trace file will be written to either USER_DUMP_DEST (if the error was caught in a user process) or BACKGROUND_DUMP_DEST (if the error was caught in a background process like PMON or SMON). The trace file contains vital information about what led to the error condition. Note 443529.1 11g Quick Steps to Package and Send Critical Error Diagnostic Informati
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Ora-4030
company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions ora-04031 solution Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million ora-4031 shared pool fragmentation programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Resolving ORA-4031 “unable to allocate x bytes of shared memory” up vote 16 down vote favorite 2 I need some https://blogs.oracle.com/db/entry/ora-4031_troubleshooting pointers on how to diagnose and fix this problem. I don't know if this is a simple server setup problem or an application design problem (or both). Once or twice every few months this Oracle XE database reports ORA-4031 errors. It doesn't point to any particular part of the sga consistently. A recent example is: ORA-04031: unable to allocate 8208 bytes of shared memory ("large pool","unknown object","sort subheap","sort key") When this error comes http://stackoverflow.com/questions/994182/resolving-ora-4031-unable-to-allocate-x-bytes-of-shared-memory up, if the user keeps refreshing, clicking on different links, they'll generally get more of these kinds of errors at different times, then soon they'll get "404 not found" page errors. Restarting the database usually resolves the problem for a while, then a month or so later it comes up again, but rarely at the same location in the program (i.e. it doesn't seem linked to any particular portion of code) (the above example error was raised from an Apex page which was sorting 5000+ rows from a table). I've tried increasing sga_max_size from 140M to 256M and hope this will help things. Of course, I won't know if this has helped since I had to restart the database to change the setting :) I'm running Oracle XE 10.2.0.1.0 on a Oracle Enterprise Linux 5 box with 512MB of RAM. The server only runs the database, Oracle Apex (v3.1.2) and Apache web server. I installed it with pretty much all default parameters and it's been running quite well for a year or so. Most issues I've been able to resolve myself by tuning the application code; it's not intensively used and isn't a business critical system. These are some current settings I think may be relevant: pga_aggregate_target 41,943,040 sga_max_size 268,435,456 sga_target 146,800,640 shared_pool_reserved_size 5,452,595 shared_pool_size 104,857,600 If it
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ORA-04031 solution Oracle Error Tips by Burleson Consulting Updated February 24, 2016 Oracle docs note this about ORA-04031: ORA-04031: unable to allocate string bytes of shared memory Cause: More shared memory is needed than was allocated in the shared pool. Action: If the shared pool is out of memory, either unable to use the dbms_shared_pool package to pin large packages, reduce your use of shared memory, or increase the amount of available shared memory by increasing the value of the INIT.ORA parameters "shared_pool_reserved_size" and "shared_pool_size". If the large pool is out of memory, increase the INIT.ORA parameter "large_pool_size". There are many valuable resources regarding shared pool sizing, and ORA-04031 is very commonly encountered in situations unable to allocate involving the sizing of large pools. Below is an excerpt from an the article, Oracle Concepts - Shared Pool and Multi-Threaded Server (MTS) in which ORA-04031 is addressed and offered a resolution. If ORA-04031 is thrown, consider using the following select: select name, SUM(bytes) from V$SGASTAT where pool='LARGE POOL' group by ROLLUP(name); Though the number of bytes may vary, ORA-04031 is commonly thrown in operations with configured large pools. The exampled select above offers a summary of the number of bytes which will reveal the current pool size and you proximity to the maximum pool size which is specified within the LARGE_POOL_SIZE parameter. You will find that when the LARGE_POOL is increased up to 100%, ORA-04031 will typically be eliminated. To help you to understand more clearly the impact that large pool sizing can have in resolving ORA-04031, you may be interested in the statement below: Sizing the large pool can be complex. The large pool, if configured must be at least 600 kilobytes in size. Usually for most MTS applications 600k is enough. However, if PQO is also used in your Oracle8 enviro