Ora-error Stack 04031 Logged
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Fundamentals Oracle Errors Performance Tuning ASM Datafiles & Tablespaces Exadata 5 Easy Step to Solve ORA-04031 with Oracle Support Provided Tool Are you still seeing ora-04031: unable to allocate 3896 bytes of shared memory "ORA-04031: unable to allocate 512 bytes of shared memory". Now Remote
Ora-04031 Solution
DBA need not to worry about this error because Oracle has introduced a very good tool to Troubleshoot ora-04031 oracle 11g ORA-04031. You just need to upload alert log files and trace file having error details and an online tool will give a solution immediately. Before going into detail, ora-04031: unable to allocate 4160 bytes of shared memory 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 memory from SGA and memory is not available in this situation ORA-04031
Ora 04031 Unable To Allocate 4096 Bytes Of Shared Memory Java Pool
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/orappdw1/diag/rdbms/dbh/DBH4/incident/incdir_146193/DBH4_pz99_15585_i146193.trc Use ADRCI or Support Workbench to package the incident. See Note 411.1 at My Oracle Support for error and packaging details. Wed Mar 27 13:35
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ORA-04031 solution alter system flush shared pool Oracle Error Tips by Burleson Consulting Updated February 24, 2016 Oracle docs note this about ORA-04031: ORA-04031: unable toOra-04031 Shared Pool 12c
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 use the dbms_shared_pool package http://www.dbas-oracle.com/2013/05/5-Easy-Step-to-Solve-ORA-04031-with-Oracle-Support-Provided-Tool.html 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 involving the sizing of large pools. http://www.dba-oracle.com/sf_ora_04031_unable_to_allocate_string_bytes_of_shared_memory.htm 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$SGASTAT where pool='LARGE POOL' group by ROLLUP(name); Though the number of bytes may vary, ORA-04031 is commonly thrown in operations with configured large pools. The exampled select above offers a summary of the number of bytes which will reveal the current pool size and you proximity to the maximum pool size which is specified within the LARGE_POOL_SIZE parameter. You will find that when the LARGE_POOL is increased up to 100%, ORA-04031 will typically be eliminated. To help you to understand more clearly the impact that large pool sizing can have in resolving ORA-04031, you may be interested in the statement below: Sizing the large pool can be complex. The large pool, if configured must be at least 600 kilobytes in size. Usually for most MTS applications 600k is enough. However, if PQO is also used in your Oracle8 environment then the size of the large pool will increase dramatically. The V$SGAST
Tom Kyte � Last updated: January 14, 2013 - 11:36 am UTC Category: Database � Version: 8.1.5 Whilst you are here, check out some https://asktom.oracle.com/pls/asktom/f?p=100:11:0::::p11_question_id:528893984337 content from the AskTom team: On Creating, Dating, and Binding Latest http://blog.tanelpoder.com/2009/06/04/ora-04031-errors-and-monitoring-shared-pool-subpool-memory-utilization-with-sgastatxsql/ Followup You Asked Tom: My Development Environment: I have a NT development box with 256MB on it. There are two oracle databases on it. At least 2 identical schema owners on each of them. Each scema has on an average about 10 pl/sql packages of unable to about 1000 lines each. I have separated two databases as D (Development) and Q (For our own internal testing). Also there is a JRUN server, and a Netscape Enterprise Server running on the same box. My SGA: Total System Global Area 24899532 bytes Fixed Size 65484 bytes Variable Size 7983104 bytes Database Buffers 16777216 bytes Redo unable to allocate Buffers 73728 bytes Some of the pfile Parameters: db_block_size integer 8192 db_block_buffers integer 2048 shared_pool_size string 5000000 shared_pool_reserved_size string 250000 shared_pool_size string 5000000 Problems Encountered: Our developers are using servlet applications, and our testers are banging against the database pretty hard. I have to restart the server at least once or twice every day due to shared memory errors such as the one below. Our QC and Production environments will be dedicated Oracle servers running on Solaris boxes with much better resource allocations. Any help on how to eliminate/mitigate this problem will be greatly appreciated. Thanks, Khalid Sample Errors: *********************************************** Error: SQLException java.sql.SQLException: ORA-04031: unable to allocate 4096 bytes of shared memory ("shared pool","GF","PL/SQL MPCODE","BAMIMA: Bam Buffer") ORA-06508: PL/SQL: could not find program unit being called ORA-06512: at line 1 begin :1 := gfx.insrt_coach('Ron Jennings',5,'04172001','','','',''); end; Error: SQLException java.sql.SQLException: ORA-00604: error occurred at recursive SQL level 1 ORA-04031: unable to allocate 4216 bytes of shared memory ("shared pool","select con#,obj#,rcon#,enabl...","sga heap","library cache") INSERT INTO gfx_suggestion (suggestion, suggestion_id, timestamp,
TPT scripts for solving real life performance problems → ORA-04031 errors and monitoring shared pool subpool memory utilization with sgastatx.sql by Tanel Poder Posted on June 4, 2009 Since Oracle 9.2 the shared pool can be "partitioned" into multiple parts. This was probably done for relieving shared pool latch contention for crappy applications (which use shared pool latches too much due bad cursor or connection management). The "partitions" are called shared pool subpools and there can be up to 7 subpools. Each subpool is protected by a separate shared pool latch and each subpool has its own freelists and LRU list. If you are interested in more details, a good starting point is this whitepaper by Oracle. There are few different ways for detecting how many subpools you have in use. The more convenient ones are here: You could query X$KGHLU which has a line for each shared pool subpool and (from 10g) also java pool if it's defined: SQL> select count(distinct kghluidx) num_subpools 2 from x$kghlu 3 where kghlushrpool = 1; NUM_SUBPOOLS ------------ 7 The "kghlushrpool" column, which is 1 for shared pool subheaps and 0 for java pool, isn't there in 9i (and in 9i the java pool apparently is not reported in x$kghlu anyway). The reason why I don't just count all matching lines from x$kghlu but use count distinct instead is that in Oracle 10.2.0.1 there are 4x more lines reported in this x$table. There's an additional concept called sub-sub-pool starting from 10.2 where each shared pool sub-pool is split futher into 4 areas (allocations with different expected lifetime/durations go into different sub-sub-pools, but the same sub-pool latch protects all activity in sub-sub pools too). But in 10.2.0.1 the x$kghlu reports all sub-sub-pools too for some reason. The whitepaper from Oracle mentioned above explains this in more detail. So from above output I see that in my instance all 7 shared pool subpools are in use. Oracle determines the number of needed subpools (during instance startup) based on your shared pool size and cpu_count. IIRC in 9.2 if you had 4 CPUs or more AND the shared_pool_size was bigger than 256 MB then 2 subpools were used, in 10g shared_pool_size had to be bigger for that, 512 MB I think and in 11g its 1GB. I don't recall