CANNOT SET BLOCK SIZE TO 16K IN ORACLE 10.2

Has anyone tried to configure the block size to 16k in oracle 10.2? I installed 10.2 with the datawarehouse option and it set the block size to 8k. Any ideas?

Yes, but the feature is not selected by default, if I remember correctly.
Werner

Similar Messages

Cannot set Block Size

Hi all,
 
When I tried to create a database 11g using DBCA, I noticed the tool did not allow me to select the block size. It was automtically set to 8KB without being able to modify it.
 
Is there any reason for that?
 
os: windows xp sp2

When you create a new database you have two options when using the dbca, create it by using a seed database (by means of a cloning procedure) or create a completely new database (customized). If you choose the first option, then you must adopt the physical structure from the seed database, which by default is 8k and there is no way to change it. If you create a completely new database you can modify the block size since there is no physical structure yet.
~ Madrid

ORA-00349: failure obtaining block size for '+Z' in Oracle XE

Hello,
I am attempting to move the online redo log files to a new flash recovery area location created on network drive "Z" ( Oracle Database 10g Express Edition Release 10.2.0.1.0).
When I run @?/sqlplus/admin/movelogs; in SQL*Plus as a local sysdba, I get the following errors:
ERROR at line 1:
ORA-00349: failure obtaining block size for '+Z'
ORA-06512: at line 14
Please let me know how to go about resolving this issue.
Thank you.
See below for detail:
Connected.
SQL> @?/sqlplus/admin/movelogs;
SQL> Rem
SQL> Rem $Header: movelogs.sql 19-jan-2006.00:23:11 banand Exp $
SQL> Rem
SQL> Rem movelogs.sql
SQL> Rem
SQL> Rem Copyright (c) 2006, Oracle. All rights reserved.
SQL> Rem
SQL> Rem NAME
SQL> Rem movelogs.sql - move online logs to new Flash Recovery Area
SQL> Rem
SQL> Rem DESCRIPTION
SQL> Rem This script can be used to move online logs from old online
log
SQL> Rem location to Flash Recovery Area. It assumes that the database
SQL> Rem instance is started with new Flash Recovery Area location.
SQL> Rem
SQL> Rem NOTES
SQL> Rem For use to rename online logs after moving Flash Recovery
Area.
SQL> Rem The script can be executed using following command
SQL> Rem sqlplus '/ as sysdba' @movelogs.sql
SQL> Rem
SQL> Rem MODIFIED (MM/DD/YY)
SQL> Rem banand 01/19/06 - Created
SQL> Rem
SQL>
SQL> SET ECHO ON
SQL> SET FEEDBACK 1
SQL> SET NUMWIDTH 10
SQL> SET LINESIZE 80
SQL> SET TRIMSPOOL ON
SQL> SET TAB OFF
SQL> SET PAGESIZE 100
SQL> declare
2 cursor rlc is
3 select group# grp, thread# thr, bytes/1024 bytes_k
4 from v$log
5 order by 1;
6 stmt varchar2(2048);
7 swtstmt varchar2(1024) := 'alter system switch logfile';
8 ckpstmt varchar2(1024) := 'alter system checkpoint global';
9 begin
10 for rlcRec in rlc loop
11 stmt := 'alter database add logfile thread ' ||
12 rlcRec.thr || ' size ' ||
13 rlcRec.bytes_k || 'K';
14 execute immediate stmt;
15 begin
16 stmt := 'alter database drop logfile group ' || rlcRec.grp;
17 execute immediate stmt;
18 exception
19 when others then
20 execute immediate swtstmt;
21 execute immediate ckpstmt;
22 execute immediate stmt;
23 end;
24 execute immediate swtstmt;
25 end loop;
26 end;
27 /
declare
ERROR at line 1:
ORA-00349: failure obtaining block size for '+Z'
ORA-06512: at line 14
Can someone point me in the right direction as to what I may be doing wrong here - Thank you!

888442 wrote:
I am trying to drop and recreate ONLINE redo logs on my STANDB DATABASE (11.1.0.7)., but i am getting the below error.
On primary, we have done the changes., ie we added new logfile with bigger size and 3 members. When trying to do the same on Standby we are getting this error.
Our database is in Active DG Read only mode and the oracle version is 11.1.0.7.
I have deffered the log apply and cancelled the managed recovery, and dg is in manual mode.
SQL> alter database Add LOGFILE GROUP 4 ('+DT_DG1','+DT_DG2','+DT_DG3') SIZE 1024M;
alter database Add LOGFILE GROUP 4 ('+DT_DG1','+DT_DG2','+DT_DG3') SIZE 1024M
ERROR at line 1:
ORA-00349: failure obtaining block size for '+DT_DG1'First why you are dropping & recreating online redo log files on standby.
On standby only standby redo log files will be used. Not sure what you are trying to do.
here is example how to create online redo log files, Check that diskgroup is mounted and have sufficient space to create.
sys@ORCL> select member from v$logfile;
MEMBER
C:\ORACLE\ORADATA\ORCL\REDO03.LOG
C:\ORACLE\ORADATA\ORCL\REDO02.LOG
C:\ORACLE\ORADATA\ORCL\REDO01.LOG
sys@ORCL> alter database add logfile group 4 (
2     'C:\ORACLE\ORADATA\ORCL\redo_g01a.log',
3     'C:\ORACLE\ORADATA\ORCL\redo_g01b.log',
4     'C:\ORACLE\ORADATA\ORCL\redo_g01c.log') size 10m;
Database altered.
sys@ORCL> select member from v$logfile;
MEMBER
C:\ORACLE\ORADATA\ORCL\REDO03.LOG
C:\ORACLE\ORADATA\ORCL\REDO02.LOG
C:\ORACLE\ORADATA\ORCL\REDO01.LOG
C:\ORACLE\ORADATA\ORCL\REDO_G01A.LOG
C:\ORACLE\ORADATA\ORCL\REDO_G01B.LOG
C:\ORACLE\ORADATA\ORCL\REDO_G01C.LOG
6 rows selected.
sys@ORCL>
Your profile:-
888442
     Newbie
Handle:      888442
Status Level:      Newbie
Registered:      Sep 29, 2011
Total Posts:      12
Total Questions:      8 (7 unresolved)
Close the threads if answered, Keep the forum clean.

Need to understand the relation B/w Bigger block size like 16k or 32k

Hi
How can we determine which block size is good for the data base specially for reporting DB on which real time replication is being performed.
I will really appreciate if some one could help me in identifying this or are there any ways to find out the correct DB block size by queering any db objects.

I think that part of the decision will have to be based on knowledge of your application and how it interacts with the database. If you database does a lot of single reads/updates of records then the smaller block size will probably be more appropriate.
However if your application does bulk reads, insertions then you might benefit for larger block sizes.
There are several Thread already on this subject and references as well:
size of db_block_size
how to decide size of db_block_size of a block.
Re: DB_BLOCK_SIZE
do a search in the search field on the main thread page for more.
Regards
tim

Cannot set paper size

I want to print photos and try to set the paper size to 4 x 6 photo paper.When I set it, press OK - and then go in again - the paper size has been reset back to A4.I've tried to set the paper size to photo paper 4 x 6 in many different ways in the printer driver but it always changes the setting back to A4 - even though the printer is loaded with photo paper.What to do?

I want to print photos and try to set the paper size to 4 x 6 photo paper.When I set it, press OK - and then go in again - the paper size has been reset back to A4.I've tried to set the paper size to photo paper 4 x 6 in many different ways in the printer driver but it always changes the setting back to A4 - even though the printer is loaded with photo paper.What to do?

How to install 10g database on windows with db block size 16k

Hi,
Can somone help me install oracle 10g database on windows xp with db block size as 16k.
i need this database, because it is one of the recommendations for insalling OWB(Oracle Warehouse Builder).
Thanks,
Philip.

1) In Initialization parameter pile
DB_BLOCK_SIZE=8192/16K - One way
2) The other way once you install Oracle 10 G then at the time when you are creating database with Database Configuration Assistant you can modify the block size by the[b] Initialization parameter screen.
- Sizing Tab
Block Size 8K/16K
*** Remember by default Oracle 10 G uses 8K block size.
You use the options on the Sizing tab to configure the block size of your database
and the number of processes that can connect to this database. The Block Size setting corresponds to the smallest unit of storage within the Oracle database. All storage of database objects (tables, indexes, and so on) are governed by the block size. The block size defaults to 8KB, but you can modify it. Once the database is created, you cannot modify this setting.
The maximum and minimum size of an Oracle block depends on the operating system. Generally, 8KB is sufficient for most transaction-oriented applications, and larger block sizes such as 16KB and higher are used in data warehousetype applications.
The Processes setting specifies the maximum number of simultaneous operating system processes that can be connected to this Oracle database. You must include at least six processes for each of the Oracle background processes. You can increase this number on the Initialization parameter screen.

Concerning oracle single block io call and os block size!!

Hi, all
The block size of my db(10gr2) is 8k, and
the db is on the raw device file system on a aix machine.
OS block size is 512k.
How much block will be read from disk when a single oracle io call occurs?
Which one is currect, 8K or 512K?
If the block size for a single io call depends on the os block size (512k),
I think os block size need to be tuned for oracle block size (8k).
If we use raw device file system, os level block size has no meaning??
Thanks in advance.
Best Regards.

Hi,
Please refer to the following oracle doc:
http://docs.oracle.com/cd/B28359_01/server.111/b32009/appa_aix.htm
extract from it:
Setting the Database Block Size
You can configure Oracle Database block size for better Input-Output throughput. On AIX, you can set the value of the DB_BLOCK_SIZE initialization parameter to between 2 KB and 32 KB, with a default of 4 KB. If Oracle Database is installed on a journaled file system, then the block size should be a multiple of the file system block size (4 KB on JFS, 16 K to 1 MB on GPFS). For databases on raw partitions, Oracle Database block size is a multiple of the operating system physical block size (512 bytes on AIX).
Thanks and Regards,
Raj K.

How to set the size of an open dialog

HI Everyone:
I cannot set the size of the open dialog.
I create a menu and menu item called "open"
The menu item "open" will call OpenFile().
However, I cannot set the size of the open dialog
Everytime when the open dialog pops up
the size isn't 500 x 500.
Does anyone know what's wrong with this program ?
Thanks a lot,
Rodger
================================================================
public void OpenFile(){
JFileChooser fc = new JFileChooser();
fc.setSize(new Dimension(500,500));
fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
fc.showOpenDialog(this);
================================================================

Try this and then tell us if it worked:
JFileChooser fc = new JFileChooser();
fc.setPreferredSize(new Dimension(500,500));
fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
JDialog d = new JDialog(new JFrame());
d.setSize(500, 500);
d.getContentPane().setLayout(new FlowLayout());
d.getContentPane().add(fc);
d.setVisible(true);

Drives, block size and raptor300 choice

Hi,
Got MacPro2,1 (07 flavour) and was planning on upgrading some internal drives. My boot is currently using two striped WD 500G's with a block size of 16k. If i were to replace these with newer drives and changed the block size to 32k, would there be any issues to speak of ? Thinking of superduper backups, Adobe CS3 licensing, Time machine doing whole boot update etc.
Alternatively i may go for a pared-down boot and use one raptor 300GB, but which one ?
WD3000BLFS / WD3000HLFS / WD3000GLFS ? - HLFS looks like the one with regularly placed SATA connections, but unsure which fits the MacPro sleds. Also is there a link for further isolation solutions eg. vibration dampeners.
Do the Raid Edition's of WD drives still cut the mustard in terms of performance (1TB Western Digital WD1002FBYS RE3, SATA 3Gb/s, 7200 rpm, 32MB Cache, 4.20 ms).
Many thanks
J

16k use to be slightly better for boot drive. The trouble wtih Apple's, I don't know how to change it on the fly like I can with SoftRAIDs.
Okay, so you probably might want 4 WD Veloci's for scratch, or 3 SSDs.
Any WD Black or RE3 should be just fine, 500GB up to 1TB, and then you get into 2TB Green RE4, yes, an RE Green drive edition.
The other factor is you want even more than 16GB RAM to be used as cache for primary 'scratch'.
There is a guide to photoshop acceleration and optimizing up on
http://www.macgurus.com - lower left side panel of links to articles.

Zfs boot block size and ufs boot block size

Hi,
In Solaris UFS file system , boot block resides in 1 to 15 sectors, and each sector is 512 bytes total makes 7680 bytes
bash-3.2# pwd
/usr/platform/SUNW,SPARC-Enterprise-T5220/lib/fs/ufs
bash-3.2# ls -ltr
total 16
-r--r--r-- 1 root sys 7680 Sep 21 2008 bootblk
for zfs file system the boot block size is
bash-3.2# pwd
/usr/platform/SUNW,SPARC-Enterprise-T5220/lib/fs/zfs
bash-3.2# ls -ltr
total 32
-r--r--r-- 1 root sys 15872 Jan 11 2013 bootblk
when we install zfs bootblk on disk using the install boot command ,how many sectors it will use to write the bootblk?
Thanks,
SriKanth Muvva

Thanks for your reply.
my query is when zfs boot block size is 16K, and on disk 1 to 15 sectors(here boot block going to be installed) make around 8K,
it mean in the 16K,it writes only 8K on the disk
if you don't mid will you please explain me in depth
I m referring the doc for UFS, page no 108 ,kernel bootstrap and initialization (its old and its for Solaris 8)
http://books.google.co.in/books?id=r_cecYD4AKkC&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false
please help me to find a doc for kernel bootstrap and initialization for Solaris 10 with zfs and boot archive
Thanks in advance .
Srikanth

Larger block size = faster DB?

hi guys,
(re Oracle 9.2.0.7)
it seems that a larger block_size makes the database perform operations faster? Is this correct? if so, why would anyone use 2k block sizes?
thanks

Hi Howard,
it's uncharted territory, especially at the higher blocksizes which seem to be less-well-tested than the smaller ones Yup, Oracle releases junkware all the time, untested poo . . .
You complain, file a bug report, and wait for years while NOTHING happens . . .
Tell me Howard, how incompetent does Oracle Corporation have to be not to test something as fundamental as blocksizes?
I've seen Oracle tech support in-action, it's like watching the Keystone Cops:
Oracle does not reveal the depth of their quality assurance testing, but many Oracle customers believe that Oracle does complete regression testing on major features of their software, such as blocksize. However, Oracle ACE Director Daniel Morgan, says that “The right size is 8K because that is the only size Oracle tests”, a serious allegation, given that the Oracle documentation, Oracle University and MetaLink all recommend non-standard blocksizes under special circumstances:
- Large blocks gives more data transfer per I/O call.
- Larger blocksizes provides less fragmentation (row chaining and row migration) of large objects (LOB, BLOB, CLOB)
- Indexes like big blocks because index height can be lower and more space exists within the index branch nodes.
- Moving indexes to a larger blocksize saves disk space. Oracle says "you will conserve about 4% of data storage (4GB on every 100GB) for every large index in your database by moving from a 2KB database block size to an 8KB database block size."
So, does Oracle really not do testing with non-standard blocksizes? Oracle ACE Director Morgan says that he was quoting Bryn Llewellyn of Oracle Corporation:
“Which brings us full circle to the statement Brynn made to me and that I have repeated several times in this thread. Oracle only tests 8K blocks.”
Wow.
Edited by: jkestely on Sep 1, 2008 2:52 PM

How should be set Index block size in Warehouse databases?

Hi,
We have Warehouse database.
I cannot find out index block size.
1. Where can I get know our index block sizes?
2. How can I enlarge index block sizes? Is it related with tablespace?
After your suggestion do I need increase or set buffer cache keep pool according to block sizes? 2K, 4K, 8K, 16K and 32K can be specified?
could you help me please?
thanks and regards,

See the BLOCK_SIZE column in DBA_TABLESPACES.
You can't "increase" the block size. You'd have
a) to allocate DB_xK_cache_size for the new "x"K block size
b) create a new tablespace explicitly specifying the block size in the CREATE TABLESPACE command
c) rebuild your indexes into the new tablespace.
Indexes created in a tablespace with a larger block size have more entries in each block.
You may get better performance.
You may get worse performance.
You may see no difference in performance.
You may encounter bugs.
"increasing block size" is an option to be evaluated and tested thoroughly. It is not, per se, a solution.
Hemant K Chitale
http://hemantoracledba.blogspot.com

Optimal NTFS block size for Oracle 11G on Windows 2008 R2 (OLTP)

Hi All,
We are currently setting up an Oracle 11G instance on a Windows 2008 R2 server and were looking to see if there was an optimal NTFS block size. I've read the following: http://docs.oracle.com/cd/E11882_01/win.112/e10845/specs.htm
But it only mentioned the block sizes that can be used (2k - 16k). And basically what i got out of it, was the different block szes affect the max # of database files possible for each database.
Is there an optimal NTFS block size for Oracle 11G OLTP system on Windows?
Thanks in advance

Is there an optimal NTFS block size for Oracle 11G OLTP system on Windows?ideally FS block size should be equal to Oracle tablespace block size.
or at least be N times less than Oracle block size.
For example - if Oracle BS=8K then NTFS BS better to be 8K but also can be 4K or 2K.
Also both must be 1 to N times of Disk sector size. Older disks had sectors 512 bytes.
Contemporary HDDs have internal sector size 4K. Usually.

Oracle's block size and operative system cluster

hallo,
I would like to move our oracle's database 10.2g from server in a datacenter with Vmware environment, where the net admin will install windows 2008 with 64 bit.
Now, the net admin strong believe that if oracle's block size is near at size of cluster of the cooked filesystem, oracle perfomance will increase, and he wants to set oracle's block size to 64 K
It's a right idea or a mistake?
thanks' in advance anyone answers.

Dan_58 wrote:
hallo,
I would like to move our oracle's database 10.2g from server in a datacenter with Vmware environment, where the net admin will install windows 2008 with 64 bit.
Now, the net admin strong believe that if oracle's block size is near at size of cluster of the cooked filesystem, oracle perfomance will increase, and he wants to set oracle's block size to 64 K
It's a right idea or a mistake?
I think he's probably had more experience with SQL Server - which is more closely integrated with the operating system, which means this type of thinking can be of some help. SQL Server has a fixed extent size of 64K (8 x 8KB pages) and an algorithm that allows it to use readahead on extents, so it's fairly common practice to synchronise the SQL Server extents with the operating system allocation unit - which is why, historically, SQL Server admins would set up the O/S with a 64KB allocation unit and fuss about aligning the allocation unit properly on the hardware.
This type of thinking is not quite so important in Oracle systems.
Regards
Jonathan Lewis

How to change block size 32 at installation of oracle

hey
i'm going to install aoracle on 64bit windows server 2003. but the problem i'm facing is that i dont know how to change bolck size from 8k to 32k. i usually run setup dan install oracle but during this process it not prompt to change Bolck size. plz help what step i should take in order to successful installtion of oracle 64bit with 32K block size. i tried to find dcoumnet link but every body disscuse the db block size could be change but how i did find anywhere.

yes you are right but what can i do as per my understanding about the below statement is that i should crerate DSS instead of gernal purpose database plz help what can i do now
From Bug 5141453, development indicates that DB_BLOCK_SIZE cannot be changed for the General Purpose, Transaction Procession and DataWarehouse templates as the seed database is using 8k block size.
You should create a custom database to get a different block size.
References

CANNOT SET BLOCK SIZE TO 16K IN ORACLE 10.2

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