Oracle Error 4031
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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 Note 1087773.1 ORA-4031 Diagnostics Tools [Video] Have you observed anORA-04031 error reported in your ora-4031 unable to allocate alert log? An ORA-4031 error is raised when memory is unavailable for use or ora 04031 oracle 11g r2 reuse in the System Global Area (SGA). The error message will indicate the memory pool getting errors and high level information about what ora 04031 unable to allocate 4096 bytes of shared memory kind of allocation failed and how much 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 ora 4031 streams pool 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 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
Dde: Problem Key 'ora 4031' Was Completely Flood Controlled (0x6)
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 Information to Support[Video] Oracle Configuration Manager (OCM) Oracle Configuration Manager (OCM) works with My Oracle Support to enable proactive support capability that helps you organize, collect and manage your Oracle configurations. Oracle Configuration Manager Quick Start Guide Note 548815.1: My Oracle Support Configuration Management FAQ Note 250434.1: BULLETIN: Learn More About My Oracle Support Configuration Manager Common Causes/Solutions The ORA-4031 can occur for many different reasons. Some possible causes are: SGA components too small for workload Auto-tuning issues Fragmentation due to application design Bug/leaks in memory allocations For
Fundamentals Oracle Errors Performance Tuning ASM Datafiles & Tablespaces Exadata 5 Easy Step to Solve ORA-04031 with Oracle Support Provided Tool
Ora-4030
Are you still seeing "ORA-04031: unable to allocate 512 bytes ora-04031 solution of shared memory". Now Remote DBA need not to worry about this error because Oracle has ora-4031 shared pool fragmentation introduced a very good tool to Troubleshoot ORA-04031. You just need to upload alert log files and trace file having error details and an online tool will https://blogs.oracle.com/db/entry/ora-4031_troubleshooting give a solution immediately. Before going into detail, Let's first understand what is ORA-04031 ? when It arise ? and what is difference between ORA-04031 and ORA-04030 ? What is ORA-04031 ? and When it arise ? ORA-04031 is error message related to lack of available SGA memory component. When a process needs some http://www.dbas-oracle.com/2013/05/5-Easy-Step-to-Solve-ORA-04031-with-Oracle-Support-Provided-Tool.html memory from SGA and memory is not available in this situation ORA-04031 occurs. What is difference between ORA-04031 and ORA-04030 ? ORA-04031 is error message related to lack of available SGA memory component While RA-04030 is related to lack of available memory in PGA area. ORA-4031 error message look like this in Database Alert log files: Tue Sep 27 22:20:33 2011 Errors in file /u01/app/oracle/diag/rdbms/dbh/Dbh3/trace/Dbh3_j004_16488.trc (incident=72497): ORA-04031: unable to allocate 32 bytes of shared memory ("shared pool","select t.ts#,t.file#,t.block...","SQLA","tmp") Incident details in: /u01/app/oracle/diag/rdbms/dbh/Dbh3/incident/incdir_72497/DBH3_j004_16488_i72497.trc Tue Sep 27 22:20:43 2011 Dumping diagnostic data in directory=[cdmp_20110927222043], requested by (instance=3, osid=16488 (J004)), summary=[incident=72497]. Use ADRCI or Support Workbench to package the incident. See Note 411.1 at My Oracle Support for error and packaging details. ORA-4030 error message look like this in Database Alert log files: Wed Mar 27 13:35:52 2013 Errors in file /u01/app/orappdw1/diag/rdbms/dbh/DBH4/trace/DBH4_pz99_15585_DBMS_SQLDIAG_10053_20130327_132724.trc (incident=146193): ORA-04030: out of process memory when trying to allocate 8224 bytes (qesca subheap,qerjo hash table) Incident details in: /u01/app/o
Oracle 11gR1 RAC to 11gR2 Applying PSU 11.2.0.3.5 to Grid Infrastructure and DB Home ASM Dataguard Install Transportable Tablespace Example Oracle12c Performance Grid MySQL Reset MySQL Root Password Unix Linux AIX HP-UX Solaris Netapp Reference Resource Center ADRCI Starting with Oracle Goldengate http://askdba.org/weblog/2008/07/simplified-approach-to-resolve-ora-4031/ Scripts Useful SQL for DBA's Useful Metalink Articles About Us Contact Simplified Approach to Resolve ORA-4031 Amit Bansal / 21 July, 2008 After writing few Case studies and other related articles, I will be sharing my approach for Resolving ORA -4031 error. First we will see what ORA-4031 actually means. 04031, 00000, "unable to allocate %s bytes of shared memory (\"%s\",\"%s\",\"%s\,\"%s\")" // *Cause: More shared memory is needed than was allocated in the shared unable to pool. // *Action: If the shared pool is out of memory, either 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". ORA-4031 error is encountered when we do not have sufficient unable to allocate memory available in shared pool/large pool to service a memory request. But in actual ORA – 4031 can be encountered in any of these areas 1) Shared pool 2) Large Pool 3) Java Pool 4)Streams pool (new to 10g) This brings us to the first step in our pursuit for finding the cause for ORA -4031. Step1: Identify the Pool associated with error Like any other Oracle error, we first need to check Database Alert Log file and also any trace files which gets generated during that time in user_dump_dest,background_dump_dest. Though there are cases when ORA-4031 error is not recorded in alert.log. Starting from 9.2.0.5, you should be able to see trace files which gets generated in udump/bdump location (Depending on whether background process or user process encountered the error). ORA – 4031 has basically three arguments 1) Size requested 2) Area 3) Comment ORA-4031: unable to allocate