I find posted and written in many places that the DB block size should be a multiple of the OS block size. I can't find any information, however, on how to find what the OS block size is for an OS. How to find the OS block size for Windows and UNIX systems (Solaris, Linux, and HP-UX)?
View 4 RepliesAS of we know that we can get the number of blocks occupied by data in a table by querying the user_tables Data Dictionary.
My questions are,
1.)how to know if i want the each block size ?(i.e each block size either it is 4kb or 8kb or 16kb..)?
2.) Is the block size is same for all blocks in a table and in Database or it varies?
3.)The block size is DB dependent or Table dependent or Machine dependent(32-bit, 64-bit and OS)?
In Oracle 9i
I know that db_block_size defines the standard/default block size for my datafiles.
I know db_cache_size defines the size of the my default database buffer of the size of my standard/default block size.
db_block_size = 8192 (8k)
db_cache_size = 200Mo of 8k block
Is there any needs for the other buffer cache
db_16k_cache_size
db_4k_cache_size
db_32k_cache_size
and so on?
If I have NO datafiles other than of the default block size, would I need to define a size for those other buffer pool? Is there any process that would benifit of these pools?
1) When might one choose non-standard block sizes?
2) Why do we need to apply patch? Just to fix bugs?
I am using oracle 10g with sga_max_size =4GB and db block size 16k. Now i am creating a tablespace with block size 32 kb , whats value i select for the parameter db_32k_cache_size.
Is there any standard way to calculate the value of this parameter.
SQL> select block_size from v$controlfile;
BLOCK_SIZE
----------
16384
SQL> show parameter db_block_size;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_block_size integer 8192
the 2 can have difference block size?
We are working on migrating from 9.2.0.4 to 11.2 and we've set up a test machine so that we could test the install and the import (as well as test additional 11g features that we want to begin using).
So we created the database and created all of the tablespaces beforehand.
Our import command is
$ORACLE_HOME/bin/imp system/manager FULL=Y BUFFER=140000 FILE=/dbexport/Lhtech.exp VOLSIZE=2000M GRANTS=Y INDEXES=Y COMMIT=Y IGNORE=Y
However, when we run the import, we get the errors like so:
Import: Release 11.2.0.1.0 - Production on Tue Oct 5 15:01:19 2010
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Export file created by EXPORT:V09.02.00 via conventional path
[code]....
First of all, the block size in our "newly" created tablespaces is 8192...and these are obviously trying to recreate the tablespaces with a block size of 2048.
1) Why is it not ignoring these create tablespace commands when those tablespaces already exist?
2) how in the world do we get around the block size issue? We've tried nearly everything we could find, but we've still not had any luck.
All the analysis till now on our system proves that our system is clearly I/O bound and db sequential read is the biggest culprit.
We have even identified the index which is being affected by sequential read. I am thinking of creating a new tablespace with 32K blocksize (currently all table spaces are 8k) and migrate this index to the new space. That way, Oracle will have to do less number of reads to get the required data.
But is there anything wrong in having just one tablespace with a differnt block size? Or is there anything that I have to be watchful about while doing it?
i written this code i m facing ORA-04030: out of process memory when trying to allocate 16408 bytes error
/* Formatted on 2011/11/26 11:52 (Formatter Plus v4.8. */
DECLARE
row_id varchar2(50);
v_batch_id temp.batch_id%TYPE;
v_slab_id temp.slab_id%TYPE;
flag NUMBER (2);
num varchar2(50) := &row_id;
[code].....
How can we find the size of a view or synonym or table in a database. What is the code.
View 4 Replies View RelatedWould like to know, how to find the size of individual folder in ASM 10g !
Also I am not able to find the PATH/name of the raw devices in ASM 10g !
I need to find the tablespace size (used and free) for a partitioned table
View 3 Replies View RelatedHow to check/find the size of current ROLLBACK segment in oracle 10g ?
View 20 Replies View RelatedI have a table with structure as:
CREATE TABLE XML_TABLE_1
(
ID NUMBER NOT NULL,
SOURCE VARCHAR2(255 CHAR) NOT NULL,
XML_TEXT SYS.XMLTYPE,
CREATION_DATE TIMESTAMP(6) NOT NULL
[code].....
- So HOW do I find the total size occupied by this table. Does BINARY storage work as LOB storage. i.e. I need to consider USER_LOBS as well for this. OR foll. will work
select segment_name as tablename, sum(bytes/ (1024 * 1024 * 1024 )) as tablesize_in_GB
From dba_segments
where segment_name = 'XML_TABLE_1'
and OWNER = 'SCHEMANAME'
group by segment_name ;
- Also if I am copying it to another table of same structure as:
Insert /*+ append */ into XML_TABLE_2 Select * from XML_TABLE_1.
Then how much space in ROllbackSegment do I need. Is it equal to the size of the table XML_TABLE_1?
how to find the corruption block and judge whether it is physical corruption or logical corruption?
View 3 Replies View Relatedquery to get the name and size of all the databases associated to grid..
I need to find this to do capacity planning in our environment.
i have form have one multi record block and sing record block. In multi record block having an item namely Excise_value. I want to find the sum of total Excise_Value for all the record. How to accomplish this.
PS: I want to use the Formula/summary property in forms
I am working on form builder 6i.I have FIND widnows and MAIN window.
FIND Window: contains field1 and field2, FIND Button.
block A: Multi record data block on table t1. It contains field1,field2,field3.
block B: non datablock, it contains field4, field5.
If i enter something and click FIND button, it will populate data in Block A.If i put the cursor in any record in block A, and after that put the cursor in Block B, it will populate block B related to Block A record.For this, In Block A--> post record(block level) trigger, i am capturing values in variables.
:GLOBAL.f1:=:BlockA.field1
:GLOBAL.f2:=:BlockB.field2
In Block B--> When-New-Block-instance(Block Level)
select field3, field 4 from t2 where t1=:global.f1 and t2=:global.f2;
and populating data in block B.It's working fine.
REQUIREMENT: If i click the FIND second time, in Block B--> it's retaining previous value. I want to clear the block B once i click the FIND button. I tried to write in POST-BLOCK (Block B-->block level)
CLEAR_BLOCK('NO_VALIDATE');
But it's not working.In which trigger i have to write code to clear block.
I was about to move some tables from one table space to another but it seems it is not possible to move partitioned tables between table spaces of different block sizes.
So far the only option I have is to export and then import back the data.
know if there is any way to move a partitioned table between table spaces of different block size?
We are planning to export the table data to a file pipedelimited. How do i estimate the size of the FlatFile based on the table size? or avg rowlength
View 3 Replies View RelatedI am using oracle 8.1.5 database and my temp01.dbf file size is increased upto 19.8 GB now i want reduce its size .
View 13 Replies View Relatedi have multi data block filed. and checkbox field which based on control block...My task is when i check checkbox only one field should enabled and my mouse goes to that field
e.g
item11 item21 item31 chkbox1
item12 item22 item32 chkbox2
Scenario like this :
My item field based on data block and checkbox based on control block,while i checked chkbox1 , only item31 on that current record should be enabled and i changed value only on that field
when i checked chkbox1 , my cursor goes to item31...not item32
i have a master detail form, In Master block we have one field cheque amount and in Detail block we have field receiveable amount invoice wise. if company paid us a cheque amount we will enter this amount in Master block field Cheque amount and in detail block there will be invoice wise receivable amounts. i want to distribute the cheque amount in detail block invoice wise for example
Cheque amount in master block = 291
Invoice wise receiveable amount is as follows
Invoice No , receivable amount , Received amount
10, 196 , 0
20 , 95 , 0
30 , 54 , 0
Result should be as follows:
Invoice No , receivable amount , Received amount
10, 196, 196
20 , 95 , 95
30 , 54, 0
Received amount field should be distributed according to the receivable amount when recevied amount = cheque amount then remaining will be 0.
i have an error with block corruption
Error: Corrupt block relative dba: 0x01c12a58 (file 7, block 76376)
What all the ,methods I can go for if we are working on a production environment with out any down time.
I can go for dbms repair package and restore and recover
I have a multi record control block (basically a text item displaying 6 records) where user enters values and I want to process the values using pre-insert trigger.
I want to read value in each record and then do some tasks using a pre-insert trigger before I commit the values. To navigate between the records I was using first_record, next_record, clear_record built-ins but it gives errors like "40737-illegalrestricted procedure next_record in pre-insert trigger".
i have few questions to ask.
1)How to find out the total size of my database.
2)what is dblink and how to find out the same.
One of my user is asking to give me the size(bytes) of row 39 and size(bytes) of row 49 of a table ZETR.
as i am not aware of how to collect size(bytes) for a particular row.
I Have a server System Configuration with
RAM size: 16GB Ram & Hard disk Size of 1TB.
I Installed Oracle 11g R2 in the server SystemI want to Allocate Dedicated Memory for oracle..How Should i calculate the Memory size of SGA+PGA for good Performance..
I have Oracle database.I take rman backup everyday.Also I set a scheduled backup script.But scheduled backup size is 166MB,but if I take manual rman backup(rman>backup database) this backup size will 2.8GB.This backup isn't incremental backup.
I wrote 3 batch script.Finally this backup script call
backup script:
run
{
backup database plus archivelog delete input format 'C:\db_11g_backup\backup\oracle_scheduled_backup\backups\%d_%t_%s.rman';
[Code]...
How to increase ASM DATA free size? I tried deleting expired backups and old archive logs which are backed up more than one time. Still no success ..
View 1 Replies View Related