Server Administration :: Quick Check On Hidden Parameter?
Mar 20, 2013
quick check on a hidden parameter? I need to know the default value and possible values for _serial_direct_read on various releases, I have only 11.2.0.3 available right now and I'ld like to know this for 11.2.x.x 11.1.x.x, and 10.2.x.x.
Below is the query that will show what it is currently which (unless you've changed it) will be the default: auto for my 11.2.0.3. Then to see the options, try to set it to something wrong, my options are false/true/never/auto/always. I think false/true were the only choices for 10.2 and are maintained only for compatibility. But I can't rememebnr 11.1.
orcl>
orcl> set lin 80
orcl> select KSPPSTVL from x$ksppcv join x$ksppi using (indx) where ksppinm='_serial_direct_read';
KSPPSTVL
--------------------------------------------------------------------------------
auto
orcl>
orcl> alter system set "_serial_direct_read"=rubbish;
alter system set "_serial_direct_read"=rubbish
*
ERROR at line 1: ORA-00096: invalid value RUBBISH for parameter _serial_direct_read, must be from among false, true, never, auto, always
orcl>
update: added 11.1.x.x to my wishlist
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Mar 14, 2012
We a running oracle9i database and forms 6i application.
We have 4 gb ram size and sized the sga for 700mb pga for 400mb for past 4 months there is no problem.
Now from last week we encounter the server hang, and we do restart. How to check reason for hanging.what are all the check list to carried out.
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Jul 8, 2010
How can I check whether the ASM is used in the environment? how I can check for it and if being used, how to connect to that instance later on.
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Mar 3, 2012
you have some 500 Db how will u check the alertlog file. do u do it manually or is their any tool to check the alertlog files. how to check it.
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Oct 20, 2011
How can i check a partition whether it has been compressed? just as flowing test,i can not get the information about partition P_L1 whether been compressed.
SQL> Select
2 aa.compression,
3 aa.partition_name
4 From dba_tab_partitions aa
5 Where aa.table_name = 'TB_HXL_LIST';
COMPRESS PARTITION_NAME
-------- ------------------------------
DISABLED P_L1
DISABLED P_L2
DISABLED P_L3
DISABLED P_L4
SQL> Alter Table tb_hxl_list compress;
Table altered.
SQL> Alter Table TB_HXL_LIST
2 Move Partition P_L1 compress;
Table altered.
SQL> Select
2 aa.compression,
3 aa.partition_name
4 From dba_tab_partitions aa
5 Where aa.table_name = 'TB_HXL_LIST';
COMPRESS PARTITION_NAME
-------- ------------------------------
ENABLED P_L1
ENABLED P_L2
ENABLED P_L3
ENABLED P_L4
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Feb 3, 2012
How to check whether database is dedicated or shared ?
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Jul 23, 2010
Actually in our environment , sysadmins are upgrading java versions on Unix (HP & Solaris) Machines and they have asked the query whether oracle database uses Java or not?
If it uses then all the databases need to be shut down for their planned activities and if not no need to shutdown the databases.
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Dec 23, 2011
i am getting this error during expdp ORA-01555 -snapshot too old
1. i increased undo_retention i.e 50000
2. i execute expdp during late night when almost zero user is online so no commit from any other session.
3. we have a table having BLOB data type field in a table which is 500 GB in size.complete DB size is 700 GB
where and why this error exists.if corruption of BLOB so how to check that etc. the same error is occurring in three of our data centres during expdp.
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Aug 6, 2010
would want to check which tables located in which datafiles.
Tried with this command:
select B.FILE_NAME from dba_segments a, dba_data_files b
where a.header_file=b.file_ID and segment_name='TABLE_NAME'
Seems like it only shows 1 datafile. Some tables are large and i suppose it's resided in more than 1 datafile.
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Apr 29, 2012
which data dictionary view would you query to see the free extents in a tablespace.
i use dba_free_space;
SQL> select tablespace_name,sum(bytes),sum(blocks) from dba_free_space where
tablespace_name = 'SYSTEM' GROUP BY TABLESPACE_NAME;
TABLESPACE_NAME SUM(BYTES) SUM(BLOCKS)
------------------------------ ---------- -----------
SYSTEM 9830400 1200
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Jun 13, 2010
I need to display the parameter and status of DB for listener and Read Only.
I know those value could be get from command line , but could we get the values of Listener and Read only by SQL/PlSQL? So I can get it through the query of DB.
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Feb 9, 2010
we have a few profiles in dba_profile. How to check what is the last modification date of the the resources inside each profile.
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Dec 9, 2011
I often use "alter session set xxx=xxx;" command to change parameter value temporarily. After that, how to reset parameter value to default and I don't want logout sqlplus.
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Jul 22, 2010
SQL> alter system set sga_max_size=1G scope=spfile;
System altered.
SQL> startup force
ORA-12545: Connect failed because target host or object does not exis
SQL> show parameter sga
ERROR:
ORA-03114: not connected to ORACLE
SQL> startup force
ORA-24324: service handle not initialized
ORA-01041: internal error. hostdef extension doesn't exist
SQL> startup
ORA-24324: service handle not initialized
ORA-01041: internal error. hostdef extension doesn't exist
SQL> startup force
ORA-24324: service handle not initialized
ORA-01041: internal error. hostdef extension doesn't exist
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Aug 31, 2010
How to change db timezone parameter. My application team has asked me to change the db timzone parameter by following sql.
ALTER database SET TIME_ZONE = '+10:00';
Is this way is the correct one , and do we have any impact on database and does it require a db bounce.
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Jul 29, 2011
It always used to be that Automatic Memory Management and Linux huge pages were incompatible: you had to use one or the other. But 11.2.0.2 has new parameter, USE_LARGE_PAGES. This isn't documented apart from a few articles on metalink, but Googling it suggests that if it is on TRUE (the default) or ONLY then I can use AMM with huge pages.
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Dec 9, 2011
I have a question ragarding undo tablespace. I want to ask that why only undo tablespace information we need to specify in parameter file. We do not specify any other tablespace information. Not even for temporary tablespace. Then why we need to give undo tablespace name while instance is creating.
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Apr 29, 2012
which initializaion parameter cant be change after creating the database?
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Nov 4, 2013
We have migrated database data from physical servers to virtual servers. i want to ensure all database parameters are set correctly in both physical and vblock servers. My question is what are all the parameters need to check and compare in both servers to ensure database from both servers ( physical/vblock ) are in sync.
Database used -- RAC database
OS used -- RHL 5.7
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Aug 27, 2012
When I list the parameters with "show parameter", I get only numeric value for hash_area_size with no unit, what is the unit for that value and conversion of it to MegaBytes.
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May 11, 2012
I want to change cursor_sharing, open_cursors and session_cached_cursors parameter values for SPFILE (Only SPFILE) using SQL Query.
I have found following SQL Queries, but I don't know these queries are only for SPFILE or not.
ALTER SESSION SET cursor_sharing='EXACT';
ALTER system set open_cursors=2500;
ALTER SESSION set session_cached_cursors=70;
I need SQL Queries only for SPFILE.
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Mar 26, 2013
I have a simple question about database sessions. The value of parameter "sessions" is set to 500 and the users connect to database through an application server(Jboss). There are more than 500 users connect to the database through application.
My question is, how more than 500 users can connect to the database without any issue, if we set the value of "sessions" parameter to 500?
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Nov 9, 2011
I am getting the following error while starting database.
ORA-32004:obsolete and/or deprecated parameter(s) specified
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Jun 10, 2013
if mytable.col1 is not blank, then copy mytable.col1 to mytable.col2 BUT, it needs reformatting during the copy. Both columns are varchar2 col1 being 15 wide and col2 being 20 wide.
I need to transform from 'PACKAGEabcde001' to 'PACKAGEabcde 00001'
so yes, those 5 extra characters are indeed 3 spaces and 2 extra zero's.
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Dec 15, 2010
How oracle deals with the setting of init.ora parameter compatible.
e.g. we have
DB Version=10.2.0.4
compatible=10.2.0
what is the possible leak for us ? Is there any description about the features changed in 10.2 up to 10.2.0.4 in all steps - so that we can check out which functions we do not have.
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Jan 31, 2012
I have a question about spfile.
SQL> SELECT COUNT(*) FROM v$parameter WHERE value IS NOT NULL;
COUNT(*)
----------
246
SQL> SELECT COUNT(*) FROM v$spparameter WHERE value IS NOT NULL;
COUNT(*)
----------
20
v$parameter displays information about the initialization parameters that are currently in effect for the session,but v$spparameter displays information about the contents of the spfile.I want to know why the count of parameters whose values are not null in v$parameter is greater.where are they from? My initialization parameter file is spfile.
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Apr 12, 2013
i try to startup a database, and get that obsolete/deprecated parameter specified(ORA-32004: obsolete and/or deprecated parameter(s) specified)so i try to reset the parameter, but it seems it is already reset(not in spfile), so maybe this is in memory. SO now i try to reset with scope = memory or both, it gives this error(ORA-32029: resetting with SCOPE=MEMORY or SCOPE=BOTH is currently not supported).
what to do, because now i cannot reset with scope = memory and in spfile it is not there but still it comes in deprecated parameter.
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Jul 30, 2011
I want to put one check box to check all the check boxes.how can i do this?
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Jul 31, 2011
I am not sure if the problem is related to hidden characters but its my best guess so far. I am trying to enhance a part of the ERD by creating a lookup for a column one of the table that uses text (finite set of values).
CREATE TABLE N_AGREEMENT_STATUS
(
STATUS_ID NUMBER(2) PRIMARY KEY,
STATUS_NAME VARCHAR2(10 BYTE)
);
INSERT ALL
INTO N_AGREEMENT_STATUS VALUES (1, 'INACTIVE')
INTO N_AGREEMENT_STATUS VALUES (2, 'ACTIVE')
INTO N_AGREEMENT_STATUS VALUES (3, 'CLOSED')
INTO N_AGREEMENT_STATUS VALUES (4, 'CANCELLED')
SELECT * FROM DUAL;
when I try to update the source table no update takes place (0 records updated) if I used the following statement:
ALTER TABLE N_AGREEMENT ADD STATUS_ID NUMBER(2);
UPDATE N_AGREEMENT SET STATUS_ID =
(
SELECT STATUS_ID
FROM N_AGREEMENT_STATUS
WHERE N_AGREEMENT.STATUS = STATUS_NAME );
but it works fine only if I used:
UPDATE N_AGREEMENT SET STATUS_ID =
(
SELECT STATUS_ID
FROM N_AGREEMENT_STATUS
WHERE N_AGREEMENT.STATUS LIKE STATUS_NAME || '%'
);
The strange thing is that when I use:
SELECT N_AGREEMENT.STATUS, N_AGREEMENT.STATUS_ID
FROM N_AGREEMENT
WHERE N_AGREEMENT.STATUS = 'ACTIVE';
it returns correct results and all status = 'ACTIVE' appear correctly!
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Sep 16, 2012
)How do you view the value of the parameter that is being used by instance? show parameter..?
2)How do you get the information of hidden parameters
3)What is the database object that stores information related to various types of db connections over network
4)How do you verify since when the db session is running
5)How do you verify the Originating machine details of the database session
6)How do you verify the name of program that the db session is running
7)What is the naming convenion of Base tables. Where is the information of base tables stored?
8)How are dynamic views created. Whre is the information of dynamic views stored?
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