Oracle Database Lite Client database performance

Hi,
I need to know well does Oracle databse lite client databse works if it contains 3-3.5 GB data? Does it get sluggish beccause the maximum allowed is 4 GB?
Regards
Roomap

We had similar problems during the processing phase (delay here points at a client device issue).
We use Dell and HP PDAs, and have databases up to about 40MB. During the acceptance testing a couple of years back we were finding that the processing phase could be upto about 25 minutes on new builds/complete refresh
We tested out a few different scenarios that might help
1) clear down databse files and odbc.txt (this will force a complete rebuild without affecting any parameters) with the SD installed
2) repeat the above, but remove the SD card before the sync (this forces the databases to be put into my device/built in storage
3) try different types of SD cards
our results found that we would on average get
1) 15-20 minutes
2) 2 minutes
3) big variance of 2.5 to 20 minurtes, but consistent by manufacturer
It seemed that the different speed SD cards made a big difference, and even cards nominally the same speed from different manufacturers were very different in practice.
In some cases (Kingston was one i think), Japananese manufactured cards were much better than the european ones, even though they were supposed to be identical.
If you get a difference between the processing phase when using SD cards vs using main memory, i would expect the cards to be the issue.
NOTE we have also had issues where the user pressed the power off whilst the application was processing (we have some end of visit checks that can take up to 90 seconds). If this happened and they later resumed, the process would continue, but the few milliseconds delay in repowering the SD card was enough to cause device read and write errors. Again some cards were worse than others

Similar Messages

Oracle database performance after server reboot

hi masters,
this is not some kind of question, but a discussion. some statements come from our client that after weekly reboot of system, the oracle database performance is low for some time and increase after some time(say 2 days).
i think it is but obvious, because at reboot oracle flushes all cache, and temporary space, so it need to re parse the sql statements and perform some disc I/O's so it might need some time and hence performance will degrade.
but at the same time some people claim that after reboot their database performance is better than their normal performance for some days. it seems controversial that's why i am posting it here.
what might be the reason behind this?? prior can have a valid reason of hard parsing, but what with second case??
any clarification is highly appreciated...
thank you
regadrs
VD

Vikrant,
You should wait for some time buddy, its weekend ;-) .
this is not some kind of question, but a discussion. some statements come from our client that after weekly reboot of system, the oracle database performance is low for some time and increase after some time(say 2 days).i think it is but obvious, because at reboot oracle flushes all cache, and temporary space, so it need to re parse the sql statements and perform some disc I/O's so it might need some time and hence performance will degrade.
>
I would start from saying that checking the performance when the system just started, is a wrong approach. There would be lots of IOs , parsing, calculations(related to memory allocations) happening so there would be a delay/bad performance at that time. Very simple example can be parsing, another can be memory allocation. Oracle doesn't allocate the entire memory in the instance startup that is allocated to the memory areas but allocates just the bare minimum that is needed to start the instance and than after the startup, it keeps on allocating the memory. So surely enough, with the startup and after a while of it, there would be a different performance than that after the instance hsa already been started and the workload informations have started coming up.
Its correct that Oracle would deallocate all the caches with the reboot as the instance is on the memory(physical) and with the reboot , that would be flushed including the SGA which is allocated over it. Temporary tablespace is now not freed with the reboot. I guess its a rather illogical thing to do but that's what is there now. Oracle keeps the segment allocated even after the reboot is issued, hence the reason for larger temporary tablespaces.
>
but at the same time some people claim that after reboot their database performance is better than their normal performance for some days. it seems controversial that's why i am posting it here.
what might be the reason behind this?? prior can have a valid reason of hard parsing, but what with second case??
>
This should not come as a surprise once we understand what might be happening with this process. Assume a situation where you have undersized caches. For example, shared pool . which is very heavily used for database , if this is going to be undersized and you are not using automatic memory management, you won't be enjoying the dynamic management of this parameter. Now, if you do lots of parsing , thanks to your wrongly written queries, you would eventually end up filling up shared pool to its max thus leaving no space for incoming new hard parsed cursors. Here , if you can't manage to add more memory to add to it, the only solution left would be to flush the shared pool( as good as rebooting the db because this would do the same) and than make space for the new cursors. The performance is going to be better becausethe cursors would not be getting flushed out immediately and will be kept in the shared pool as long as its not filled up again.Once you have reached to limit of it, again there would be performance benefit. So there are always odds added to the statements like this that I rebuilt my index , I got better, I rebooted my server, my querie are much faster now. Most of the time when these kind of statements are given, they are based on what we have seen, without understading what actually might have happened. So I would siggest to hear the statement but not take them as a rule of thumb to follow.
Hope this all makes some sense for you and would help somewhat.
Aman....

General Oracle Database Performance trouble solving best practice Steps

We use Oracle 11g DB on Windows2008R2 as web application backend DB.
We have peformance trouble in that DB.
I would like to know General Oracle Database Performance trouble solving best practice Steps.
Is there any good general best practice document for performace trouble solving in the internet ?

@Girish Sharma: I disagree with this. Many people say things like your phrase "..first identify the root cause and then move forward" but that is not the first step. Any such technique is nothing more than looking at some report, finding a number that you don't like, and attempting to "fix" it. Some people use that supposedly funny term "compulsive tuning disorder" (first used by Gaja Krishna Vaidyanatha) to describe this approach (also advocated in this topic by @Supriyo Dey). The first step must be to determine what the problem is. Until you know that, all those reports you mentioned (which, remember, require EE plus pack licences) are useless.
@teradata0802, your best practice starts by finding the problem. Is it, for example, that the overnight batch jobs don't finish until lunchtime? A screen takes 10 seconds to refresh, and your target is one second? A report takes half an hour, but you need to run it every five minutes? Determine what business function is causing your client to lose money because it is too slow. Then investigate what it is doing, how, and why. You have to begin by focussing on the problem, not by running database-wide reports..

Oracle database Performance testing

What are the procedure to dp Oracle performance Testing???
Is there any tools to do Oracle database Performance or load testing??

insa wrote:
OS- windows
DB-Oracle11gr2
Just i want check if 100 of users using my Application at a time what will be the performance of my database??Database performance is dependent on a number of factors - where application design, application code and data model, are critical components.
And these components need to be designed, written, and implemented with performance and scalability as primary requirements. From design issues like using 3NF correctly, to coding issues like using bind variables correctly.
You cannot simply slap design and code together, run that against the database, and then tune database performance. That is not the correct approach. Oracle database technology performs very well. It is the application that does not perform. It is the design that does not perform. It is the architecture that does not perform.
When I see the comment that someone wants to test database performance, I see someone not understanding what determines performance - and incorrectly thinking that the database is a black box, and that this black box's performance can be tuned and set, irrespective of the data model, application code and architecture used.

Storing Foreign Characters in oracle 9i Lite Client Database.

Hi All,
My Database configuration Is
RDBMS VERSION 9.0.1.1.1
NLS_CHARACTERSET AL32UTF8
NLS_NCHAR_CHARACTERSET AL16UTF16
NLS_LANGUAGE AMERICAN
NLS_TERRITORY AMERICA
Operating System Windows 2000
My Oracle Lite configuration Is
Oracle9i Lite Release 5.0.2.0.8
Client Locations:
Africa,Europe,Asia,America
Currently all clients store data only in English in the client odb either through java and oracle forms applications.
We want to now store data for some specific tables, in the clients own language.Also we should be able to retrieve that data and see that data as it was entered.
For example :
The client in china after downloading the odb should be able to enter the data for that specific tables in the Chinese language.(They use windows 2000/XP English version).
1. What are the settings i need to do in the client environment?
like installing Chinese font or setting NLS_LANG parameter etc...
2. What are the settings i need to do in the server environment?
Because there should not be any loss of any data or junk values getting stored instead of actual values entered by clients.
Also when i query that specific tables in the oracle database after synchronization i should be able to view that data entered by the clients in their own language.
Eg:data entered by china clients should be visible in chinese fonts,
data entered by brazil clients should be visible in brazilian fonts,
data entered by vietnam clients should be visible in vietnamese fonts.
3. will there be any synchronization issues when clients try to sync after data entry with
their own languages?
Please do advice on these issue...........

I have given you the info of how to set up Oracle Lite for UTF8. I can only point you in the direction for globalization on the enterprise server. Also note that Oracle Lite only support NLS_LENGHT_SEMANTICS=BYTE, your EE database will be CHAR, so you have to alter the session paramter before you create the repository and/or publish your application.
Here is a Oracle Document on Globalization:
http://www.oracle.com/technology/tech/globalization/pdf/TWP_AppDev_Unicode_10gR2.pdf
Here is what Oracle Lite's Developers Guide has on development of linguistic sorts:
2.11 Support for Linguistic Sort
Linguistic sort is a feature for the ASCII version of Oracle Database Lite. It produces culturally acceptable order of strings for a specified language or collation sequence. The ASCII version supports several code pages defined by single-byte 8-bit encoding schemes. Each of these code pages is a super set of 7-bit ASCII, and the additional accented characters necessary to support a group of European languages are included in the upper 128 bytes. A new string comparison mechanism is provided that produces strings in a linguistically correct order by mapping each collation element of a string to the corresponding 8-bit value of the supported code page.
2.11.1 Creating Linguistic Sort Enabled Databases
The linguistic sort capability must be enabled when the database is created using the CREATEDB command line utility with the <collation_sequence> enabled.
Note:
For more information on the CREATEDB utility, see Section A.2, "CREATEDB".
The behavior of the ORDER_BY clause and the WHERE condition are determined by how the NLS_SORT parameter is implemented. Binary sorting is the default setting, and is used unless the <collation_sequence> parameter is set to use the linguistic sort ordering rules.
NLSRT is not supported in the current version of Oracle Database Lite. Therefore, NCHAR data type is not yet available.
2.11.2 How Collation Works
Collation refers to ordering of strings into a culturally acceptable sequence. A collation sequence is a sequence of all collation elements from an alphabet from smallest collation order to the largest. Once a collation sequence is given, orders of all strings from the same alphabet are fixed. As such, the collation sequence encodes the linguistic requirements on collation. A collation element is the smallest sub-string that can be used by the comparison function to determine the order of two strings.
2.11.3 Collation Element Examples
Normally, a collation element is just one character. In binary sorting, only one property, the code value that represents a character, is used. But in linguistic sorting, usually three properties. The primary level of difference is the base character. The secondary level of difference is for diacritical marks on a given base character. The tertiary level of difference is for the case of a given character. Punctuation can function as a fourth level of difference, but comparisons for punctuation occur last and are made at the binary rather than the linguistic level. These are used for each collation element. The following sections contain examples that demonstrate sorting priorities.
2.11.3.1 Sorting Normal Characters
This section lists a set of examples that describe how to sort normal characters.
Example 1
'a' < 'b'. There is a primary difference between them on the character level.
Example 2
'À' > 'a'. This difference occurs on the secondary level. Note that 'À'and 'a' are considered "equal" on the primary level.
Example 3
'À' < 'à' in FRENCH but 'À' > 'à' in GERMAN. This difference on the tertiary level. Note that 'À' and 'à' are considered being "equal" on the primary and secondary level. Also note that the case convention may be different for different language.
Example 4
'às' < 'at'. This is a difference on the primary level. This example shows the role of difference levels: the lower level differences are ignored if there is a primary level difference anywhere in the strings.
Example 5
'+data' < '-data' <'data' <'data-'. If strings are compared and present no difference on the primary, secondary, or tertiary levels, they are compared for punctuation.
2.11.3.2 Reverse Sorting of French Accents
Some languages, particularly French, require words to be ordered on the secondary level according to the last accent difference. This behavior is known as French secondary sorting or French accent ordering.
Example
'côte' < 'coté' in FRENCH but 'coté' < 'côte' in GERMAN. Note that the secondary difference of 'e' and 'é' occurred later than those of 'ô' and 'o'.
2.11.3.3 Sorting Contracting Characters
There are some special cases where two or more characters in a group can function as a single collation element. These types of collation elements are called 'contracting characters' or 'group characters'. In these cases each of these characters properties are assigned appropriate values.
Example
'h' < 'ch' < 'i' in XCZECH. Here 'ch' is assigned a primary property value which differentiates it from 'h' and 'i', such that 'h' < 'ch' < 'i'. Note that 'ch' is treated as a single character.
2.11.3.4 Sorting Expanding Characters
If a letter sorts as if it were a sequence of more than one letter, it is called an 'expanding character'. For example, in German the sharp s (ß) is treated as if it were a string of two characters 'ss' when comparing with other letters.
2.11.3.5 Sorting Numeric Characters
Only sorting of single digit characters from '0' to '9' is currently supported. For the supported European languages a digit character is always sorted as greater than any alphabetic character. For other languages this may be not the same. Other numeric characters such as Roman numeric characters and counting sequences, such as "one", "two", "three", are not supported at this time.
Example
'1' > 'z' in any European language, '1' < 'a' in LATVIAN. Note that this difference occurs on the primary level.

Oracle Database Performance With Semantic

Hello,
Is there a Developer's Guide for Semantic that specifically talks about database performance with the Semantic network/tables/indexes? We are having issues with performance the larger the semantic network becomes.
Any help or pointers would be appriciated.
Thanks
-MichaelB

Matt,
Thanks for your response. Here are the answers to the questions about our setup/environment.
1) Are you querying multiple models and/or a model + entailment? If so, are you using a virtual model and using the ALLOW_DUP=T query option?
A single model, no entailments. We attempted to use multiple models, and a virtual model (with ALLOW_DUP=T), however the UNION ALL in the explain plan made the query duration unacceptable.
2) Are you using named graphs?
No named graphs.
3) How many triples are you querying?
Approximately 85 million.
4) What semantic network and/or datatype indexes have been created?
We have PCSGM, PSCGM, PSCM, PCSM, CPSM, and SCM.
5) What is your hardware setup (number and type of disks, RAM, processor, etc.)?
We are running the 11.2.0.3 database on a Sun Solaris T2000, we have ASM managing our disks from RAID5, I believe currently we have two Disk Groups with the indexes in one and the data tables in the other. We have 32 GB of memory, and 32 CPUs. However, it is not the only thing running on the machine.
6) How much memory have you allocated to the database (pga, sga, memory_target, etc.)?
We have the memory_target set to 9GB, the db_cache_size set to 2GB, and the db_keep_cache_size set to 4.5GB. `pga_aggregate_target` is set to 0 (auto), as is `sga_target`.
(Since my initial request, we pinned the RDF_VALUE$ (~2.5GB) and C_PK_VID (~1.7GB) objects in the KEEP buffer cache, which drastically improved performance)
7) Are you using parallel query execution?
Yes, some of the more complex queries we run with the parallel hint set to 8.
8) Have you tried dynamic sampling?
Yes. We have ODS set to 3 for our more complex queries, we have not altered this much to see if there is a performance gained by changing this value.
Thanks again,
-Michael

Redistribute Oracle 9i Lite client

Hi,
I'm having troubles to redistribute Oracle lite with my application on the Windows platform (to Windows '95 up to Windows XP).
How do I redistribute Oracle 9i Lite with my windows application?
Thanks in advance,
Peter Rakké

Install a fresh Mobile Client for Windows 32 on your Windows XP machine and launch msync.exe. Provide username/pwd and the Mobile Server URL. Select sync. This will create a fresh mobile db and install your Windows application

Just started supporting Oracle Databases for SAP Systems

Hello Guys/Girls,
I am working as oracle dba for the past 7 years, but this is the first time, I got an opportunity to adminster databases supporting SAP systems. I am doing search on SAP Network, and gathered information on BRTOOLS, SAPGUI etc., but could not find the details what I am looking for like, database objects growth rate, sap-oracle database performance specific details, as a oracle dba what are the DOs&DONTs etc., After made a lot of search on google, I found a book from O'Reilly, but that book covers older SAP, and Oracle versions. Our Client uses oracle 9i, and 10g primarily.
I am confident as a Oracle DBA supporting non-sap systems, but not SAPsystems. Is any one of you pls., suggest me or provide me some guide lines in terms of Database Management.
Appreciate your time!

Abhi
Greate to meet another DBA in forum.The big problem we will face is SQL Tune.
Nothing much Diffnt supporting SAP.SAP PRovided some ready made tools to monitor and to solve.Reg tuning still we can follow same methoda but with approval from SAP or by ref SAP notes.Which u can find at service market place.
You can find some PDfs in sap market place and sdn.Which are ex'ly for DBas.
Reg Growth rate you can have a look on sap transactions and there are some notes also.I dont think there is specific Book or Doc which will say Dos and donts.
Performance we used to follow same methoda as a Dbas with ref of sap notes and support for any side effects.
let me know if are in need of any specific info
Regards
Vinod

DTrace probes for oracle database 10g in solaris 10

Hi guys,since a mounth i`ve learnt about solaris DTrace and its D scripts and tried to look for probes for administrating oracle database but til now,nothing!so my question,does there DTrace probes for oracle application ?i really need it now,that`s my project:tracing oracle with DTrace in solaris 10 SPARC!anyone can help me pleaaase!!!

Hey!!of course that's a great site but U know,i've already visit it and it doesn't talk about probes for oracle!!howeiver i thought about another option,how do u think about exploiting oracle instance...i mean,do u think it's possible to monitoring oracle processes (LWGR,PMON,DBWR,SMON,...) with DTrace by using providers?like fbt or io,i don't know much!!remember,the aim is monitoring oracle database performance !!
regards!

Oracle 10g Lite with ADF/BC4J Application(Offline access in Mobile )

Hi All,
We have the following requirement from one of our client.
Customer Company has R12 Apps instance(which is having 10g Database APPSDB). The users will come in the morning
and connect to the System(NEWSYSTEM) to download their daily worksheet(resides in APPSDB) to their Mobile Devices
(Windows XP - http://www.keenzo.com/zoom.asp?zoom=3830134) and then disconnect from the system. The download of data
should start after login into their Mobile Device Custom Application So that only their worksheet will be downloaded
to their Mobile Device DB.
Then they will goto their fields and review their daily worksheet in the Mobile Device application(NEW APPLICATION)
in offline mode. And update in the application with their findings, which should be stored in the Mobile Device database(MOBILEDB).
In the evening the uses will come and connect to the system(NEWSYSTEM) and login into their Mobile Application and
start the upload process, then the updated data from their Mobile Database will be uploaded into APPSDB via the NEWSYSTEM.
I checked the links, http://www.oracle.com/technology/products/lite/index.html and http://lite.us.oracle.com and I have
got some understanding about Oracle 10g Lite. For the above requirement we are proposing the NEWSYSTEM as Oracle 10g Lite Server
and the NEW APPLICATION as ADF/BC4J which can run in their Mobile Devices(work offline and then sync with DB).
I have the following questions.
1) The above proposing system is feasible?
2) Can we develop the Mobile Application using ADF/BC4J and using that we would like to
control the sync process from our custom application.(so that only their worksheet will come to their Mobile Device DB)
3) If I want to have the above system,
a) I should have Oracle 10g Lite server installed(im Unix or Windows)
b) I should have Oracle 10g Lite client installed in a Windows PC/Laptop
c) To get my custom application in My Mobile Device, first I have to deploy the application
in Oracle 10g server using Oracle Mobile Server. Then I have to connect my Mobile Device to the Oracle 10g Lite server,
and deploy the application in my Mobile Device using Oracle Mobile Manager.
4) I would like to do a POC before start the project.
What are all the installations I have to do in my Laptop.(Consider I am installing Oracle 10g Lite server/client, Mobile Manager in my Laptop)
I am new to Oracle 10g Lite, correct me if any of my understanding is wrong.
If you have any comments in the approach please add it.
Thanks in advance.
With Regards,
Kali.

1) The above proposing system is feasible?
perfecly feasible, and actually a reasonably standard use of oracle lite
2) Can we develop the Mobile Application using ADF/BC4J and using that we would like to
control the sync process from our custom application.(so that only their worksheet will come to their Mobile Device DB)
Actually two different questions here. The application code that runs on the client device can be written in any thing that will run on that type of device, and is capable of using the APIs to connect to the local database, and the other functionality like synchronisation. From the forum there look to be VB, C, java users out there (an i even believe if you wanted to, you could use forms). Main decision regarding the Platform for the application code development tends to be whatever you have the skills in.
In terms of the sync process only downloading a particular users worksheet, this would be defined when you define the snapshots of the database tables you want to download, rather than the sync login process itself.
For example - you have a table WORKSHEETS on the server that you want to download, it has a column EMP_NO which is the employee identifier. You would define the selection for the snapshot as
select * from WORKSHEETS where EMP_NO=:emp_no (note the bind variable)
when you then add users to the oracle lite application (actually the database), then you will have a parameter called EMP_NO to define with the employee number for that particular user, and this will be used automatically as the bind variable in the download.
NOTE subsetting in this way does not need to be direct, for example things like
select * from TASKS where id in (select task_id from user_tasks where emp_no=:emp_no) is perfectly valid
NOTE when reading the forum and documentation, be careful of the word application. There are actually two different things to be developed, both normally called 'application'
Within oracle lite you create an application with publication items, scripts, sequences etc. and then subscribe your users to this application. The application in this context is actually the database and synchronisation management ONLY (you can include files and code for download)
The second application is your runtime code that has a user interface, functionality, processing and validation. This is written in some development platform, and accesses the database created above for select, insert, update etc.
3) If I want to have the above system,
a) I should have Oracle 10g Lite server installed(im Unix or Windows)
YES this goes on the app server and installs a repository schema MOBILEADMIN within your database
b) I should have Oracle 10g Lite client installed in a Windows PC/Laptop
YES - once the server is set up, this is downloaded and set up by accessing the <server url>/webtogo/setup
c) To get my custom application in My Mobile Device, first I have to deploy the application in Oracle 10g server using Oracle Mobile Server. Then I have to connect my Mobile Device to the Oracle 10g Lite server,
and deploy the application in my Mobile Device using Oracle Mobile Manager.
steps in outline are
1) install server
2) develop the oracle lite application (ie: database) and publish this to the mobile server (can use the development kit or java APIs for these two steps
3) add a user with the relevant subsetting parameters
4) set up oracle lite win32 client on the laptop from the server download
5) synchronise using the msync utility on the client to create the databases and odbc entries
6) develop your application code using the client database
7) during development, then changes to database structure would be via changes and re-publish of the oracle lite application, followed by a sync to update the client database
8) once all development is complete, the runtime application code can be bundled up into the oracle lite application if you want, and then the initial sync for live users will download the database and application code.
4) I would like to do a POC before start the project.
What are all the installations I have to do in my Laptop.(Consider I am installing Oracle 10g Lite server/client, Mobile Manager in my Laptop)
You can set up a standalone server on the laptop, but better to do this on a development app server so you can use the main server development database as the data souce for the snapshot definitions (pretty easy install). there are conflicts if you try and put the oracle lite client and the mobile development kit on the same machine, but if you are familiar with java, the API development is fairly straightforward to use (i have developed applications in this, and i know only the basics of java) you do not need the MDK
Basic for a POC i would say is to
1) set up mobile server on development
2) define a simple oracle ite application on two server tables. one has select * from table, and the other has select * from table where .... including bind variable. at this stage use complete refresh as the mode for simplicity
3) publish the application, create user and define the subsetting variable
4) set up mobile client and synchronise user. use the msql utility to interrogate the database and check the content, and do some updates 9standards SQL syntax)
5) create simple appliaction code to conect to and read the database on the client
6) do a sync after the updates above and check they appear in the server
The above should be reasonably quick and proves
a) ability to define the data you want to be sent to the users
b) ability to create an app to manage the database running on the client device in you preferred software platform
c) data download and upload
after this basic POC, you can extend into defining fast refreshes to improve the efficiency of the sync process, managing the MGP process, developing a more comprehensive database and application etc. If you have complex joins between server table, you may also want to look at creating views to denormalise data and use these as the basis for the snapshots

Performance Issues on Oracle Database Lite 10.3.0.3

Hello,
we have a big problem with one of our customers. He uses Oracle Database Lite in the standalone version. There are about 600 clients running a project with about 20 Publication Items. The customer works in the logistics field, so the Main time where nearly all clients want to sync and get their tours is from 02 AM to 05 AM, so that is the time with the most traffic.
Everything went well before last week. Suddenly the compose cycle needs (at least between that hours) about ten times longer than before. Normally we had about 40 - 80 seconds, now we have about 300 - 500 average with max values from over 1200 seconds.
Therefore we have a lot of conflicts and Disconnects on the clients. It is sometimes that bad, that nearly no client can sync successfully.
We checked our Selects in the publication Items, all are very fast and look good in the explain plan, so that shouldnt be the problem.
The installation is nearly in the Default state as oracle does when you install Oracle Lite. Are there any standard settings we can change? Does anyone had the same problem already?
The Machine is a Windows Server 2003 with an Intel Xeon CPU E7-4820 and 4 GB of RAM.
Of course our customer gets a lot of trouble because of that and we have to improve and fix that as fast as we can.
Any recommendation or opinions are very welcome.
If I have to give more Info about somewhat please feel free to ask, I will give it as fast as possible.
Thanks in advance
Holger

Hey,
many thanks for your proposals. The MGP runs every minute like the default settings are, because our application is a time sensitive. The data have to be very fast on the clients in the nights and thex are only a few minutes before available. I think the parameters are important in environemnts where the mgps runs only after a few minutes?
Let me summarize the situation since my las post:
We have days (nights) where everything goes quite well. Mainly that is thrusday and friday. But on the other hand, there are days where everything really is a mess.
The mgp caycles increase and when you look to mobile manager you see 70 clients syncing very very slowly (about 300 - 600 seconds) for just a little bit of data. Then we get the disonnects and the messages in the err.log.
What do you think, is this somehow network related, or ist this a logical problem in the Mobile Server itself?
Like postes earlier, there are 500 clients syncing against a standalone mobile server.
We just couldnt figure out, why the mgp times somehow and sometimes increase that much, that there are these problems.
First we thought, that they sync newly over wireless (GPRS or Edge) and that syncing is that slowly, that everything goes down, but arent sure. Is this possible because of the architecture of the Mobile Server? That a very slow network can slow down the mgps and that does timeouts and all the other stuff?
How many clients can a Standalone Mobile Server normally serve at same time without performance problems. What do you thin about the hardware I wrote? Is it powerful enough?

Available Now: Oracle Database Lite 10g Release 1

The Oracle Database Lite development team is pleased to announce the availability of Oracle Database Lite 10g (10.0.0.0.0) for Windows 2000/XP, Solaris 2.6, 2.7, 2.8, and Red Hat Enterprise Linux AS/ES 2.1/3.0 platforms.
The Windows release is currently available from OTN at:
http://www.oracle.com/technology/software/products/lite/index.html
Oracle Database Lite 10g is a complete and integrated solution for rapid development and deployment of high impact, mission vital applications for mobile and lightweight embedded environments. Oracle Database Lite is an extension to Oracle Database 10g for enterprises wanting to increase productivity, reduce operational costs, and improve customer satisfaction.
Oracle Database Lite uses data synchronization to reliably and securely exchange data between a corporate Oracle Database and mobile workers. Oracle Database Lite also allows companies to deploy and manage users, mobile applications and devices from a remote central location. Oracle Database Lite provides the necessary framework enterprise customers need to extend their enterprise applications and data to the most popular mobile platforms: Palm OS, Linux, Microsoft Windows CE/PPC, and Microsoft Windows NT/2000/XP/UNIX.
The following is a partial list of new features for Oracle Database Lite 10g that will make your mobile deployment easier to manage, use, and develop. A complete list will be available for download/viewing soon.
Device Management
As the number of mobile devices in an enterprise increases, it becomes more important to have complete control of the devices. Oracle Database Lite Device Management is a complete infrastructure to monitor and manage Oracle Database Lite assets such as database files, software libraries, data, and application files on remote devices. Device management decreases the total cost of ownership and protects an enterprises intellectual property.
Single Oracle Lite Binary
The Oracle Database Lite 10g release contains a single set of Oracle Lite database kernel binaries for all languages, removing the necessity of having different binaries for each of the following languages: Korean, Traditional Chinese, simplified Chinese, Japanese, and US/European languages.
Shared Map
The shared map function greatly improves performance by reducing sync processing timeand enhances the scalability of shared publication items. Shared maps allow users to share record state information and reduce the size of the resulting replication map tables.
Offline Instantiation
Offline instantiation enables quick and easy setup of mobile devices for business applications. Mobile administrators are able to prepare, in batch mode, a client package, which includes the mobile client software and initial data for every mobile user. This procedure helps users avoid an expensive online synchronization processes as part of the first time mobile client setup procedure.
Synchronization Manager
The Synchronization Manager is a complete, web-based enterprise management application to manage and monitor synchronization. The Synchronization Manager allows administrators to manage the synchronization service, monitor and analyze sync performance, administer the configuration, trace synchronization history, display and browse synchronization publication and subscription information, and monitor MGP (Message Generator and Processor) performance.
Oracle Application Server Support
The Oracle Database Lite 10g Mobile Server now runs as a web application on Oracle Containers for Java (OC4J) the runtime of Oracle Application Server. If Oracle
Database Lite 10g is deployed in standalone mode, an embedded version of OC4J will be installed and used. Oracle Database Lite may also be installed against an existing instance of Oracle Application Server.
Seamless upgrade from Oracle9 i Lite 5.0.2
The Oracle Database Lite 10g Upgrade Assistant allows customers to easily upgrade from existing Oracle9 i Lite 5.0.2 installations. The Upgrade Assistant automatically converts existing application definitions to the new format, and copies all relevant files to the new installation. As many customers have deployed mission critical systems using Oracle9i Lite technology, the Upgrade Assistant has been designed to minimize system downtime.
Download
Oracle Database Lite 10g (10.0.0.0.0) for Windows can now be downloaded from the following location.
http://www.oracle.com/technology/software/products/lite/index.html

I am using Oracle 10g lite. Do you know if it supports silent installation.

How Performance can be improved at Oracle Database level

Hi Everyone,
Need a suggestion ......
I m managing SAP Landscape of Retail Sector Client.
where SAP ERP PRD database size is : 2 TB.
at SAP Application Layer .... we have setup five application system to distribute load because around 1200 users work concurrently.
Out of these 1200 Users around 300 Users keeps on fetching
reports from database which worsen database performance.
We have changed parameters of Database to improve performance.
What we have thought to setup replica of PRD system .
On which Only Report Users will execute reports.
& that System will work as Disaster Recovery Site of PRD System.
In process of that We have restored the PRD Backup on another System. But How can we replicate daily changes of PRD System on Restored System.
One which we have thought by applying offline archive files.
    daily . But somebody has told us that we can not apply
    offline archive files of PRD System to restored system
    because that Restored database is in Open stage & being
   used.
(ii) Secondly, Incremental Backup which is very time-consuming action.
Please suggest , If you have an idea & I want to know How
offline archive log file application on DR Site .
Thanks in advance !!!
Points will be rewarded !!!
Thanks
Deepak !!!

deepak gosain wrote:>
> Hi Everyone,
Hi Deepak!
> Need a suggestion ......
I'll try my best
> I m managing SAP Landscape of Retail Sector Client.
> where SAP ERP PRD database size is : 2 TB.
> at SAP Application Layer .... we have setup five application system to distribute load because around 1200 users work concurrently.
>
> Out of these 1200 Users around 300 Users keeps on fetching
> reports from database which worsen database performance.
Hmm.. might happen.
> We have changed parameters of Database to improve performance.
Oh - which ones? Why? Who told you to?
> What we have thought to setup replica of PRD system .
> On which Only Report Users will execute reports.
> & that System will work as Disaster Recovery Site of PRD System.
This setup does not work for SAP environments. To get reports out of a system with SAP the database must be open to writes.
> In process of that We have restored the PRD Backup on another System. But How can we replicate daily changes of PRD System on Restored System.
Such thing would be done via a Standby-DB.
> One which we have thought by applying offline archive files.
>     daily . But somebody has told us that we can not apply
>     offline archive files of PRD System to restored system
>     because that Restored database is in Open stage & being
>    used.
That person told you the truth.
> (ii) Secondly, Incremental Backup which is very time-consuming action.
Depends on your reference. Compared to what is it very time-consuming?
Compared with a full DB-Backup this is likely to be the less time-consuming option.
> Please suggest , If you have an idea & I want to know How
> offline archive log file application on DR Site .
For a how-to in Standby-Setup you may want to have a look into the Oracle documentation like here [Introduction to Oracle Data Guard |http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/concepts.htm#SBYDB00010]
> Thanks in advance !!!
You're welcome !!!
> Points will be rewarded !!!
Oh - nice !!!!!!!!!!
Now get a bit earnest as well:
From what you described it sounds like you're setup is a bit undersized.
If your report users use BI for their reports, than it may pay off to setup a seperate BI system that gets it's data from the ERP system automatically and not whenever a user starts a report.
Another option may be to consider using a RAC cluster - but this would be a very expensive option.
In any case the important first step has to be to find out, what the real cause for the performance degration is.
Perhabs the I/O Subsystem is the problem, perhabs the network. Perhabs another CPU would do wonder.
You'll never know - before you analyse this in depth.
Reading hints would include these notes:
618868     FAQ: Oracle performance
72638     Performance problems with SQL*Net
354080     Note collection for Oracle performance problems
853576     Oracle 10g: Performance analysis w/ ASH and Oracle Advisors
793113     FAQ: Oracle I/O configuration
619188     FAQ: Oracle wait events
805934     FAQ: Database time
Best regards,
Lars

Performance problems loading an XML file into oracle database

Hello ODI Guru's,
I am trying to load and XML file into the database after doing simple business validations. But the interface takes hours to complete.
1. The XML files are large in size >200 Mb. We have an XSD file for the schema definition instead of a DTD.
2. We used the external database feature for loading these files in database.
The following configuration was used in the XML Data Server:
jdbc:snps:xml?f=D:\CustomerMasterData1\CustomerMasterInitialLoad1.xml&d=D:\CustomerMasterData1\CustomerMasterInitialLoad1.xsd&re=initialLoad&s=CM&db_props=oracle&ro=true
3. Now we reverse engineer the XML files and created models using ODI Designer
4. Similar thing was done for the target i.e. an Oracle database table as well.
5. Next we created a simple interface with one-to-one mapping from the XSD schema to the Oracle database table and executed the interface. This execution takes more than one hour to complete.
6. We are running ODI client on Windows XP Professional SP2.
7. The Oracle database server(Oracle 10g 10.2.0.3) for the target schema as well as the ODI master and work repositories are on the same machine.
8. I tried changing the following properties but it is not making much visible difference:
use_prepared_statements=Y
use_batch_update=Y
batch_update_size=510
commit_periodically=Y
num_inserts_before_commit=30000
I have another problem that when I set batch_update_size to value greater that 510 I get the following error:
java.sql.SQLException: class org.xml.sax.SAXException
class java.lang.ArrayIndexOutOfBoundsException said -32413
at com.sunopsis.jdbc.driver.xml.v.a(v.java)
The main concern is why should the interface taking so long to execute.
Please send suggestions to resolve the problem.
Thanks in advance,
Best Regards,
Nikunj

Approximately how many rows are you trying to insert?
One of the techniques which I found improved performance for this scenario was to extract from the xml to a flat file, then to use SQL*LOADER or external tables to load the data into Oracle.

Sequencing and Trigger on Oracle 9i lite database

We created a schema (TESTSCHEMA) on Oracle 8.1.7 Enterprise edition and have a created a trigger which will use the sequence object to generate primary key for the table (TEST_TABLE)
Sequence creation:
CREATE SEQUENCE TESTSCHEMA.TEST_TABLE_SEQUENCE START WITH 6000 INCREMENT BY 1 MINVALUE 6000 MAXVALUE 6999 NOCACHE NOCYCLE NOORDER ;
Trigger creation:
CREATE OR REPLACE TRIGGER TEST_TABLE INSERT BEFORE INSERT ON TEST_TABLE FOR EACH ROW
DECLARE
pkValue NUMBER;
BEGIN
pkValue := 0;
Select TEST_TABLE_SEQUENCE.NextVal into pkValue from dual;
:NEW.TEST_KEY := pkValue;
END TEST_TABLE_INSERT;
We have created a snapshot of the schema on mobile server, synchronized the data with the client (Win32 for testing purpose).
The trigger works fine on the server, but when I run the same query on the lite database with msql it gives me an error:
[POL-3221] null key in primary index
I was wondering if Sequence generation and Triggers are supported on Oracle 9i lite database ? Or am I missing out something ??
Any information/ help is appreaciated
Thanks
Neeraj

You can't use SAVEPOINT / ROLLBACK TO SAVEPOINT statements in the database trigger:
ORA-04092: cannot SET SAVEPOINT in a trigger
ORA-04092: cannot ROLLBACK in a trigger
I am not sure what you need exactly, but you can try this:
Simulating ROLLBACK TO SAVEPOINT Behavior in a Database Trigger
http://www.quest-pipelines.com/pipelines/plsql/tips02.htm#JUNE
Regards,
Zlatko Sirotic

Oracle Database Lite Client database performance

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