Ora Error 4031
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Ora-4031 Unable To Allocate
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Ora-04031 Oracle 11g
some 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
Ora-04031 Unable To Allocate 4160 Bytes Of Shared Memory
error comes 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
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Ora 04031 Oracle 11g R2
ORA-04031: unable to allocate nn bytes of shared memory Oracle Database Tips by dde: problem key 'ora 4031' was completely flood controlled (0x6) Burleson Consulting July 17, 2015 - Updated February 24, 2016 Question: I am getting the error ORA-04031 Cannot allocate shared memory. I've tried increasing my init.ora shared_pool_size, but to no http://stackoverflow.com/questions/994182/resolving-ora-4031-unable-to-allocate-x-bytes-of-shared-memory avail. What are some causes for the ORA-04031 error, and how do I fix it?Answer: The ORA-04031 error has many root causes. Also, see MOSC notes 146599.1 and 396940.1 for more details for resolving the ORA-04031 error: Heavy fragmentation of the shared pool - This can be fixed by increasing the shared_pool_size or doing a "alter system flush shared pool" http://www.dba-oracle.com/t_ora_04031_unable_to_allocate_shared_memory.htm or bouncing the instance. Too many pinned packages - If you have pinned lots of packages with dbms_shared_pool.keep, they have not leave enough room for new work. Ultimately the solution to a ORA-04031 error is adding RAM to shared_pool_size and/or shared_pool_reserved_size. In 11g and beyond , if using AMM, increase memory_max_size to resolve the ORA-04031 error. The Oracle documentation has these notes on the ORA-04031 error: ORA-04031: unable to allocate nn 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 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". The ORA-04031 error also happens when you are using automatic memory management (sga_max_size), and the memory specific is too small. ��
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 http://askdba.org/weblog/2008/07/simplified-approach-to-resolve-ora-4031/ Reset MySQL Root Password Unix Linux AIX HP-UX Solaris Netapp Reference Resource Center ADRCI Starting with Oracle 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 my approach unable to 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 pool. // *Action: If the shared pool is out of memory, either use the // dbms_shared_pool package to pin unable to allocate 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 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 abl