AMM On HP-UX V3 Shared Memory Deallocation?

May 13, 2013

When investigating memory usage on HP-UX V3 for my oracle database 11.2.0.3.4 which use AMM, it seems to me that system is not shifting shared SGA memory to private PGA memory when needed but it allocate other memory.The shared memory don't shrink all the memory_target id allocated. VSZ = RSZ

To test i have used this script which will allocate memory in process PGA.

create or replace package demo_pkg
   as
            type array is table of char(2000) index by binary_integer;
            g_data array;
end;

[code]...

I have done the same test on a linux machine (Red Hat Enterprise Linux Server release 6.3) and the size of the POSIX shared memory switched (/dev/shm) to the PGA like demonstrated by Tanel Poder in his blog [URL]...

Related conf :

lock_sga=FALSE
pre_page_sga=FALSE
pga_aggregate_target     0
sga_target     0
memory_target     5553258496
memory_max_target     5553258496

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Sep 21, 2010

How to overcome from the below error.

Database Error-ORA-04031:unable to allocate 76320 bytes of shared memory("shared pool","SELECT/*+Norewrite*/DIST...","sql area","kkmevw:view_txt")

Here I attached that error.

Attached File(s)

Disco_Error_1.jpg ( 49.03K )
Number of downloads: 3

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Mar 9, 2012

When i try to extract create statement of table i get below error message.

SQL>
SQL> set heading off
SQL> set pagesize 0
SQL> set long 1000000
SQL> set feedback off
SQL> select
2 dbms_metadata.get_ddl( 'TABLE','CATALOG_TBL','JACK')
3 from
4 dual
5 /

ERROR:

ORA-04031: unable to allocate 104 bytes of shared memory ("shared pool",

"SELECT
/*+rule*/ SYS_XMLGEN(...","SQLA^fc8f5280","qecsub : qkxrPXformQbc")
ORA-06512: at "SYS.DBMS_METADATA", line 2625
ORA-06512: at "SYS.DBMS_METADATA", line 2668
ORA-06512: at "SYS.DBMS_METADATA", line 2983
ORA-06512: at "SYS.DBMS_METADATA", line 3897
ORA-06512: at "SYS.DBMS_METADATA", line 5678
ORA-06512: at line 1

Note:
----
I am executing this command from another user 'DEMO' which has got DBA privilege.

how to fix this error and extract the create table statement.

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Jan 25, 2010

I am facing a problem as listed below:

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not connected
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SQL>...

UPT is the user in which our data resides.

wat cud be the problem??????

I tried increasing sizes in INIT.ORA.... listener,tns is OK

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Mar 8, 2013

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I go the error message.

ERROR:
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Process ID: 0
Session ID: 0 serial number: 0

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Jul 2, 2012

My environment is Windows XP PC

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Enter user-name: sys as sysdba
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ERROR:
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Even i start the Oracle service through the services.msc there are no new entries seen in alert log file of the database.I even changed the init DBNAME. ora file but that file is not being read. what is the normal procedure used by oracle 8i while starting the DB ? Which file should be edited if i come across shared realm memory error.

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Jan 13, 2013

I'm getting the following error when i shutdown or startup the db,

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I am running 11.2.0.3 on AIX and have memory_target=35GB. I would like to know what approach to take to find out the root cause of this? btw - does AWR show if memory was under pressure and what SQL's were consuming more memory just before the problem surface?

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Jun 17, 2011

If I am log in through crystal reports , I am getting the following error.

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ORA-04031 - Unable To Allocate 104 Bytes Of Shared Memory

Aug 30, 2012

Let me put my current Environment Info.

Single Laptop Machine of 16GB RAM.
Assigned 13GB to VM.

I have installed Oracle Database 11g. 11.2.00. When I try to access my application many times I received below error

• Error:
“”Caused by: java.sql.SQLException: Could not retrieve datasource via JNDI url 'jdbc/oimJMSStoreDS' weblogic.jdbc.extensions.ConnectionDeadSQLExceptio n: weblogic.common.resourcepool.ResourceDeadException : Could not create pool connection. The DBMS driver exception was: ORA-00604: error occurred at recursive SQL level 3
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[code]......

Even when above error occur I have 7GB free JVM so JVM is not an Issue.

•I have updated Max Capacity of oimOperationsDB =100,oimOperdationDB, oimJMSStoreDS=80,SOADATAStore =80. But still I have error

• ERROR::
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java.sql.SQLException: ORA-04031: unable to allocate 352 bytes of shared memory ("shared pool","select /*+ rule */ bucket_cn...","SQLA^337fc737","qertbs:qertbIAlloca te")
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[code]......

I have modified Shared_pool_size,large_pool_size. Content of my modified Pfile is as below.

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o orcl.__java_pool_size=2777216
o orcl.__large_pool_size=56777216
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o orcl.__sga_target=1174405120
o orcl.__shared_io_pool_size=0
o orcl.__shared_pool_size=601989888
o orcl.__streams_pool_size=0

What’s value of parameter I need to set for datastore, pfile ? (I have 13GB of memory).

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Starting restore at 15-JAN-13
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
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May 17, 2013

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In January, before i looked at it, it started to throw:

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At the same time the ORA-04031 errors start to bubble through to the users. Before i could return to the scene of the crime someone else set the SGA back to 600MB and the error messages stopped. However the ORA-04031 message start to reappear in the alert log. My questions are many and, mostly, from a lack of knowledge ;) In particular:

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Oct 11, 2012

we are having a test server in bank environment.

Details:

IBM p series servers
AIX 5.3
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2. Test server - 1344M
Rest is for server.
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ERROR:
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Jun 8, 2012

on 11G R2 on Win 2008,

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Then what to do to avoid this error in future ?

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Apr 7, 2012

ERROR:
ORA-01034: ORACLE not available
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Connected to an idle instance.

SQL> startup
ORA-01261: Parameter db_recovery_file_dest destination string cannot be translated
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SQL>

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Jan 17, 2013

i did this step

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SQL*Plus: Release 10.2.0.4.0 - Production on Thu Jan 17 15:59:33 2013
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Enter user-name: sys@orcl as sysdba
Enter password:
Connected to an idle instance.
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[code].....

here its my init.ora file

##############################################################################
# Copyright (c) 1991, 2001, 2002 by Oracle Corporation
##############################################################################
###########################################
# Cache and I/O
###########################################

[code].....

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Sep 16, 2003

All of a sudden my oracle application has stopped functioning.When I try to log in I get the following messages:

ORA-27101 SHARED MEMORY REALM DOES NOT EXIST
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Jun 12, 2010

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ORA-01034: ORACLE not available
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May 20, 2013

i am facing this problem from yesterday i cant able to do any DML operations on my Database i am getting this error every time

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i am giving SHOW parameter SGA or even select statement i am getting the same error message

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Sep 7, 2010

When user insert rows in table oracle interrupts and raise error- ORA-04031: unable to allocate 256 bytes of shared memory? how to do?

I tried to increase the size of shared_pool also but cant.

large_pool_size = 0
shared_pool_size=134217728(128M)
sga_max_size=218103808(208M)

And when I fire 'select* from v$sga;'

Fixed Size 2142976
Variable Size 159386880
Database Buffers 50331648
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Jan 1, 2013

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Sep 24, 2013

i am continuously inserting data to oracle database after some time like 2 hours oracle disconnects,it creates erros like

ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Process ID: 0
Session ID: 0 Serial number: 0

after restarting the database with shutdown immediate ans startup if i start inserting records it will show erros like

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same problem is happenging with small datafiles also,

operating system: windows server 2008 R2 standard
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Feb 21, 2012

[oracle@localhost ~]$ sqlplus system/password
SQL*Plus: Release 10.2.0.1.0 - Production on Tue Feb 21 20:20:09 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux Error: 2: No such file or directory

But when i am using SID name while connecting to database i am able to connect...

[oracle@localhost ~]$ sqlplus system/password@apple
SQL*Plus: Release 10.2.0.1.0 - Production on Tue Feb 21 20:21:42 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL>

I have only one database...

TNS.......
# tnsnames.ora Network Configuration File: /u01/app/oracle/product/10.2.0/db_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
APPLE =
(DESCRIPTION =
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Dec 11, 2012

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oracle taking 55% bmcuser taking 44%,

SQL> show parameters memory

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
hi_shared_memory_address integer 0
memory_max_target big integer 3232M
memory_target big integer 3232M
shared_memory_address integer 0
SQL> show parameters sga

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
lock_sga boolean FALSE
pre_page_sga boolean FALSE
sga_max_size big integer 3232M
sga_target big integer 0
PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP
6449 bmcuser 47M 44M sleep 23 10 0:57:31 0.2% PatrolAgent/1
[code]........

pga & uga usage sessionwise

SID     ORA_USR     OS_USR     S_PROG     S.MACHINE     S.PGA_MEM     S.PGA_MEM_MAX     S.UGA_M     S.UGA_M_MAX
252     (null)     oracle     oracle@racdev1.zakathouse.org (ARC3)     racdev1.     31054584     32168696     181056     181056
227     (null)     oracle     oracle@racdev1.zakathouse.org (ARC2)     racdev1.     31054584     32168696     181056     181056
177     (null)     oracle     oracle@racdev1.zakathouse.org (ARC0)     racdev1.     31054584     32168696     181056     181056
576     (null)     oracle     oracle@racdev1.zakathouse.org (LGWR)     racdev1.     16693544     21281064     181056     181056
326     (null)     oracle     oracle@racdev1.zakathouse.org (LMS0)     racdev1.     13753080     13753080     181056     181056
376     (null)     oracle     oracle@racdev1.zakathouse.org (LMS2)     racdev1.     13556472     13556472     181056     181056
[code]........

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I have the following setup

SQL> show parameter sga;

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
lock_sga boolean FALSE
pre_page_sga boolean FALSE
sga_max_size big integer 3G
sga_target big integer 2G

from what I read I beleive this will initially grab 2GB of memory on startup and will grab up to to 3GB of memory total for the SGA. The "total" memory can be allocated to different peices of the SGA when needed but will never exceed 3GB. Is this correct or would these settings infringe on any available memory on a system that is already tight on memory?

Secondly, what happens if both these values are set to the same value?

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