Estimate a database size
Hi Joel,
Glad if you could forware me the document for estimated db size.
Thanks in advance
Mail ID is : [email protected]
Hello,
To know the database size, you may execute the following query:
Datafiles size:
select sum(bytes)/(1024*1024) "Mo" from dba_data_files;
Tempfiles size:
select sum(bytes)/(1024*1024) "Mo" from dba_temp_files;
Redolog size:
select sum(bytes)/(1024*1024) "Mo" from v$log;Then, it lacks the size of the controlfile, SPFILE or PFILE, but in general is just a few Mo.
Hope this help.
Best regards,
Jean-Valentin
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How to estimate the database size?
Hello. I have a database model in SQL data modeler. Also I've created it on the test server, but it is empty now.
Now I need to estimate the size of the database for understanding the requirements to production hardware.
For, example how many gigabytes I need in two years for my database. How can I do it?
Thank you in advance.It is called "volumetrics" in ErWIN.
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Hi,
How can I estimate the database size required for a Netweaver system?
I am installing a new system with ESS and MSS.
And what is the rate that this database will normally grow?
Appreciate any reply.
Thanks,
Tzyy MingHi Tzyy,
you should expect around 20 GB for a newly installed system. The growth rate very much depends on the scenarios you intend to use (MSS/ESS) and the number of users. Since it is almost impossible to predict the growth rate we always make sure that we provide enough space for at least 12 month under "worst case scenario" conditions - that works for us.
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Sven -
how to estimate the database size ,can anyone help, what are the parameters I need to consider.
I doubt that this is a worthwhile exercise... space is relatively cheap. And whether a database is 50GB or 500GB will be a very small cost factor given the cost of the server, the cost of o/s and Oracle licensing, the cost of development, the cost of maintenance and so on.
Take for example the size of the data dictionary that you want to estimate. That's not only dependent on the number of tables and columns. It also depends on how much PL/SQL code there is. The number of views. Whether the tables and columns are defined with comments or not. Etc.
Redo size? Nothing to do with the number of tables, the size of the tables, or number and sizes of the columns - everything to do with the amount of transactions there will be.
Tablespace size for the tables? What about block size, the amount of free space in a block (pctused and pctfree), how often rows are deleted, whether new rows are primarily added via direct path inserts (using new data blocks) or normal inserts (re-using existing data blocks with sufficient free space).
It seems to me that you think that you can accurately estimate the sizes of all areas of the database and tie a pretty pink ribbon around it, and will be nice and clean and correct and accurate.
In my experience... Real world database ain't like that. And trying to do an accurate size estimate is a waste of time and resources, with the end result not wort the 2c's of the piece of white paper it is printed on... -
Estimating The Database Size before build up
Hi,
how can i estimate oracle database size before building up. is there any query or formula there to estimate the size.
i read a thread of Sir. Joel Pérez if he is available then i m requesting him to send me that docs that you are posted for the estimation query.
my mail is [email protected]
Regards
AvnishUse the DBMS_SPACE built-in package to estimate table and index cost (size).
http://www.psoug.org/reference/dbms_space.html -
How to increase the database size
Hi All ,
Our Client is going to increase their customers from 3.5 million to 5 millions
(12 millions in future ) and there is no increase in the existing licenses..
At present we have very less space in Data base server. We are Going Live at the End of the Month.
How to increase the database size to meet the Client requirements.
we have to increase the No of Processerors etc...
Below are the details of Servers:
System Model: IBM,7040-681
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Can any body suggest me how to solve this.....
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Kasi ChukkaHi Kasi,
Your question is not very clear, from the looks of it, the load on your client's system will be doubling soon.
You need to look at the system stats on how the system is handling the current load, use transactions ST06, ST04 and ST02 to check if the DB hit ratios are as expected, the cpu idle time, the busy periods. Identify if there is large amounts of paging on the server(candidate for increase in real memory).
On AIX level, you will need to look at CPU / Memory usage.
On SAP Application server, you need to look at SAP Buffers.
On Oracle end, look at SGA stats, if it need to increase, the data growth that is current and estimated growth (DB02).
You will not get an exact answer to it, you will need to analyze the existing load and then estimate (guess). The hardware upgrade will also depend on what the client is willing to spend, its always a good practise to add 20% to what you have estimated as these figures are never accurate.
All the best.
Cheers,
Nisch -
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Hello All,
I am planning to estimate a database in Oracle. Its a fresh database and will not take any data from any other legacy or flat file systems.
Do anyone of you can provide me with a checklist sort of thing which will enable me to estimate the size of my database considering its future growth as well?
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Thanks in advance
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10g Release 2 (10.2) for Linux x86 Chapter 2 Preinstallation Tasks - http://download.oracle.com/docs/cd/B19306_01/install.102/b15660/pre_install.htm#sthref95
# 400 MB of disk space in the /tmp directory
# Between 1.5 GB and 3.5 GB of disk space for the Oracle software, depending on the installation type
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Best regards. -
How to estimate undo tablespace size in 11g?
I found someone document said, use this sql to estimate undo tablespace:
select (UR*(UPS*DBS))+(DBS*24) as "bytes" from (select value as UR from v$parameter where name='undo_retention'),(select (sum(undoblks)/sum(((end_time-begin_time)*86400))) as UPS from v$undostat),(select value as DBS from v$parameter where name='db_block_size');
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How to estimate undo tablespace size in 11g?
Thanks very much!for undo segments size you should turn it to be autoextend on as well undo management set to be AUTO
i.e
undo_managment='AUTO'
for retention see that link
Ora-01555, snapshot too old: rollback segment number 2 with name "_SYSSMU1
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Khurram -
Hi,
Can anyone tell me how can i estimate a rman backup size ?
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10x.The 'worst case' is the same size as the database size, WHEN image copies are used instead of backupsets. To prepare proper disk size you have to answer another question: How many backups do you plan to store? You have to define a retention policy, number of backups or number of days you want to go back in time.
Werner -
SQL azure database size not dropping down after deleting all table
Dear all,
I have a simple database on Azure for which I have deleted all table data. The size of the database is still showing 5Mb of data and I am charge for that. I have heard that this may happen from cluster index getting fragmented.
I have run a querry I found on internet on all my table index to show percentage of fragmentation and all report 0%.
DBA is not so my job but what could it be or how can I reduce that size ?
ON premise I would use COMPACT DB but not available in azure like some others DB action
Thnaks for tips
regardsuser created objects/data are not the only ones stored in your database. you got system objects and metadata as Mike mentions above.
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Tables are deleted but database size does not change in sql server 2008r2
Hi All,
20GB Tables are deleted in my database but database size does not change and disk size showing same size.Hi ,
I have ran the Disk usage by Top Tables report and Identified couple of tables with unwanted data for last 5 years. I have deleted the data for the first 3 years and then ran the Disk usage by Top Tables report again. When I compared the report before
and after the data deletion, I have noticed certain facts which is not matching with what I know or learned from experts like you. The following are the points where I am looking for clarification:
1.Reserved (KB) has been reduced. I was expecting the data Reserved (KB) will remain the same after the data deletion.
2. The Data(KB) and Indexes(KB) fields have been reduced as expected. The Unused(KB) field have been increased as expected.
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Terence Yu
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How to get the database size of several system
Hi
We've got a lot of database system on our landscape. I want to make a simple report to get the size the all our database on a weekly base.
I try to get a RZ20 value on it without succes.
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You can use DBACOCKPIT to centrally manage multiple instance and check the sizes.
Markus -
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I would like to determine the database size corresponding to my new BI project.
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Sharepoint 2010 - configuration database size limit
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We have below scenario in our production farm. Ours is a SharePoint 2010 Enterprise Edition server.
Medium size farm (4 WFE, 4 App Servers, Content DBs in separate tier. No SharePoint search in this farm)
Configuration DB reached 250+ GB. Please clarify below queries.
1. What is the boundary limit for configuration database size?
2. How we can scale the configuration database?
3. Can we add multiple configuration database per farm?
4. What are the best practices and regular maintenance activities to be done to keep the configuration db size under control?
It would be really really great if someone gives some good knowledge in this area.1) Not aware of one
2) You can add multiple files to the file group
3) No
Is the growth in the MDF or the LDF (log file)? If it is in the log file, are you using high availability (Clustering, Mirroring, Log Shipping, AlwaysOn)? If so, you need to run a BACKUP LOG periodically to maintain the LDF size, or allow you to truncate
the LDF.
Trevor Seward
Follow or contact me at...
  
This post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.
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