Ora-error Stack 4031
Contents |
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring ora-4031 unable to allocate developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question ora 04031 unable to allocate 4096 bytes of shared memory x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join
Ora-04031 Solution
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 pointers on how to diagnose and fix this problem. I don't know
Ora-04031 Oracle 11g
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 up, if the user keeps refreshing, clicking on different links, they'll generally get more of these kinds of ora-04031 unable to allocate 4160 bytes of shared memory 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's any help here's the current SGA sizes: Total System Global Area 268435456 bytes Fixed Size 1258392 bytes Variable Size 251661416 bytes Database Buffers 12582912 bytes Redo Buffers 2932736 bytes oracle memory-management oracle10g share|improve this question
SQL TuningSecurityOracle UNIXOracle LinuxMonitoringRemote supportRemote plansRemote servicesApplication Server ApplicationsOracle FormsOracle PortalApp UpgradesSQL ServerOracle ConceptsSoftware SupportRemote Support Development Implementation Consulting StaffConsulting PricesHelp Wanted!
Ora 04031 Oracle 11g R2
Oracle PostersOracle Books Oracle Scripts Ion Excel-DB Don Burleson ora-04031: unable to allocate 65560 bytes of shared memory Blog
ORA-04031 solution Oracle ora 04031 unable to allocate 4096 bytes of shared memory java pool 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: http://stackoverflow.com/questions/994182/resolving-ora-4031-unable-to-allocate-x-bytes-of-shared-memory More shared memory is needed than was allocated in the shared 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" http://www.dba-oracle.com/sf_ora_04031_unable_to_allocate_string_bytes_of_shared_memory.htm 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 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.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 http://askdba.org/weblog/2008/07/simplified-approach-to-resolve-ora-4031/ Goldengate 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 https://hongwang.wordpress.com/2012/07/10/solving-ora-04031-error-examples/ 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 unable to the shared 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 unable to allocate do not have sufficient 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
⋅ 3 Comments Filed Under ORA-04031, oracle error code, shared pool Oracle error code 4031 states: unable to allocate %s bytes of shared memory (\"%s\",\"%s\",\"%s\",\"%s\"). Generally this error happens when more shared memory is needed than was allocated in the shared pool or Streams pool. When a database has Automatic Shared Memory Management (ASMM) turned on, the DBA should look at the current SGA dynamic components and SGA resize operations first before trying to give more memory to SGA/shared pool. Oracle support now offers an automatic diagnosing tool for ORA-04031 error without requiring customers to open a SR. DBA just needs to upload the alert log file and the trace file generated by ORA-04031. The tool will analyze the files and then provides its findings and suggestions. One of our databases started to have ORA-04031 errors. I uploaded the alert log file and the first trace file for the error to My Oracle Support. It came back with following findings/suggestions: ============================================================================= Our analysis shows the Shared Pool "free memory" appears to be available but there are problems getting to large enough chunks of memory to satisfy memory requests. We analyzed common factors leading to "fragmented" memory chunks but did not find a clear root cause for the ORA-4031. Evidence Details: ** In your trace file, HEAP DUMP heap name = sga heap(1,0) ORA-04031: unable to allocate 4064 bytes of shared memory ("shared pool","unknown object","sga heap(1,0)","kglsim heap") ============================================================================ The diagnosing tool told us that we had free memory for shared pool. It was just that the memory was fragmented so the database couldn't get big enough chunk of memory to shared pool. View v$sga_resize_ops showed many operation failures when shared pool tried to grow merely by 26 MB. COMPONENT OPER_TYPE OPER_MODE STATUS Initial(MB) Target(MB) Final(MB) START_TIME END_TIME shared pool GROW IMMEDIATE ERROR 1,312 1,328 1,312 JUL-10-2012 09:23:36 JUL-10-2012 09:23:36 From Oracle Support, memory fragmentation issues can be difficult to diagnose and often fall into the application tuning arena. To