Problem , about JMS sender in Point-to-Point Domains

Hi all,
I study jms tutorial in chapter 4,and i have a question.
In the Point-to-Point example,i send two message(1,2),and then
i send two message again(3,4).
Now,i start SimpleQueueReceiver to receiver the message,
it will show 3,1,2,4 in this sequence,but why?
Why not 1,2,3,4
Is it a queue?
Could you help me?
Thank you.

Ordering of messages is not guaranteed in case of multiple receivers.
This is so with single client also. But Most servers deliver the messages in the order it arrives.
--Ashwani

Similar Messages

Problem in JMS Sender Adapter

Hi All,
I am trying to Pick two different XML types of Messages from a Single Queue.
For Example :- Despatch Advice and Replishment Proposal.
Queue Name is : - JMS_XI_Sender
SAP XI is not allowing me to create two different sender agreements for the same communication channel.
Service :- BS_JMS
Interface : - Despatch_Advice_OB
CC :- JMS_SENDER
and
Service :- BS_JMS
Interface : - Replishment_Proposal_OB
CC :- JMS_SENDER
Can any one tell how can SAP XI will differentiate these two messages and sends to two different receivers.

Hi Rama,
I am using XML Despatch Advice and Replishment Proposal types .
Basically I do have one sender which will post Two types of XML messages in to one single MQ Queue.
SAP XI/PI has to pick that message and then needs to check what is the Value in the "Message Type" Tag .
I do also have two different Interfaces and Mappings and Two different Receivers.
Depending on the value in Message Type SAP XI/PI has to check for the Particular Interface and Mapping, finally needs post the message to Particular Receiver
You need to have defined two different sender agreements with two different Communication channels.
In the JMS adapter Sender configuration you can mention the Queue name to pick the message . After picking the message the JMS sender adapter need to map it to the correct message type - it is defined by message interface defined in the sender agreement .
Please let us know if you need any further calrification.
Regards,
kishore

EOIO Setting of JMS Sending Adaptor does not Guarantee Right Sequence

Hi, Gurus:
I have encountered a problem for JMS sender adaptor:
The scenario is:
External Apps --> JMS ---> XI ---> SAP R/3
We need to ensure the messages put into the JMS queue being picked up in exact same sequence, therefore we choosed the setting of "EOIO".
One particular scenario need to handle is that message sequence need to be insured when we activate adapter while there are already many messages inside the queue. However, we observed some chance that sequence of message is broken in such scenario.
If there anyone has idea about it ?
Thanks in advance, points will definitely grant to the helpful ideas
Larry

Hi Liang,
Please have a look at the SAP Note mentioned below as well. It will be worth having alook at them if you have
Take a look at this note:
821268 - XI 3.0 Adapter Framework: Overview of available FAQ notes
inside you'll find all available FAQ SAP notes.
856346 FAQ: J2EE JMS Adapter: Frequently Asked Questions
Regards
Piyush
Reward Some points if found usefull.

Need help about setting up a JMS sender channel

I just started to play with PI for a few weeks and I'm trying to setup a simple JMS sender channel to read stuff from a WebSphere MQ.
I've someone installed JMS adaptor for me, but we never know it is correctly installed or not. First question is "Is there any way we can verify JMS adapter is correctly installed or not?"
In the Design: integration builder, I've a very defined a very simple data type(src_dt) which is a string and a message type(src_mt) which uses resp_dt. Finally I created a message interface (test_mia_out) that contains src_mt. At this point of time, I don't need message mapping so I didn't configurate this section.
Then I went to Configuration: Integration builder and created a new communcation channel with the following setting:
Parameter section:
Adapter Type: JMS
Transport Protocol: WebSphereMQ (Non-JMS) <- if i don't use this option, i can't enter MQ connection detail in the Source section.
Message Protocol: JMS 1.x
Adapter Engine: Integration Server
Source section:
QueueConnectionFactory Java Class: com.ibm.mq.jms.MQQueueConnectionFactory
Queue Java Class: com.ibm.mq.jms.MQQueue
...MQ connection detail...(IP, Port, Queue Manager, Channel and Queue Name )
Transport Protocol: TCP/IP <- this is consists to server side setting
JMS-Compliant: JMS-Compliant
Since I only want a very simple working sample, again I didn't change the content in receiver determination, interface determaintion and sender agreement.
Now when I active this change and I saw the following error in the channel monitor:
Short Log - Channel has internal error
Admin Info - Exception: Channel with Status Unknown or Not Registered
I did stop and start the service, refresh CPA cache and even restart the entire PI server, I always see this message and cannot find any more detail description about what is causing this problem.
My PI Server version is 7.0 and MQ version is 5.3
There's very limited resource about how to setup to read MQ message in PI and I'm stuck now. Therefore, I need a help from some experienced people to tell me if I have did something wrong or missed some steps?
And if possible, could people mind to post a step by step go through how you setup it up?
Edited by: Robert Fu on Jan 10, 2008 6:51 AM

Before you use the JMS, you need to deploy some drivers related to specific MQseries, Kindly ensure that proper driver are deployed....
If you use MQSeries 53x.xxx, you must enter the following JAR files in aii_af_jmsproviderlib.sda.
com.ibm.mq.jar, com.ibm.mqbind.jar, com.ibm.mqjms.jar, connector.jar (use the JAR file from the J2EE client directory)
check this link it will give you more inofmration
http://help.sap.com/saphelp_nw04/helpdata/en/cd/d85a9d6fab7d4dbb7ae421f710626c/content.htm
check this to get the condifuration the JMS
How to use conversion modules in JMS - https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/f02d12a7-0201-0010-5780-8bfc7d12f891
Ref How To Use the Content Conversion Module in JMS Adapter - https://websmp106.sap-ag.de/~form/sapnet?_SHORTKEY=01100035870000582377&

JMS Sender SAP JMS Provide large message problem

Hi,
we have configured a JMS sender channel to pick up messages from a queue hosted by our SAP JMS provider. Unfortunately a message of about 6 MB size isn't picked up. Smaller messages are picked up.
Has anybody experienced a problem like this before?
Kind regards,
Heiko

Hey,
I guess you are using XML messages:
We had some problems with large XML messages (e.g more the 10MB),
This is usally cause by memory problems.
There are some work-around, like increasing the memory usage of the application server.
The first thing you do is try to understand where the message stacked (in the ABAP/J2EE).
If this is a memory problem, changing the memory configuration can improve this,
but be aware that there are hardware limitation (32bit application server can use with one process only 2GB), therefore messages over 100MB probably will not pass trough XI.
If you have huge files (e.g more than 100MB)
You must develop a program that would split the large message into several small messages. the program can not be written in the XI, and should be written before the adapter. (you might install and use in this case the conversion agent)
If you are using a message with csv format (not XML),
than it is possible to configure the adapter to split every X lines
(no program need to be written)

I have recently purchased the highest storage but was unable to backup my phone via icloud, the button on my mphone to backup on icloud is grey out, anyone knows how to resolve the problem? What's the point of purchasing the biggest storage?

i have recently purchased the highest storage but was unable to backup my phone via icloud, the button on my iphone to backup on icloud is grey out, anyone knows how to resolve the problem? What's the point of purchasing the biggest storage?

First check that your device is correctly connected to the wifi/internet (settings > wifi)
If your back up continually fails, you might try turning off back up on your mobile device (settings > iCloud > storage & backup) and then deleting the backup file from iCloud by swiping the backup file on the mobile device (settings > iCloud > storage & backup > manage…) and then turning back up on again.
If this doesn't help, try turning off some items for back up in a pattern to try to establish if your problem is being caused by specific data on your device.
Being able to back up to the cloud can be very useful, especially if you don't have access to a computer or have infrequent access to one, however unless you specifically need to use iCloud for back up, you will find backing up to iTunes significantly more convenient and possibly more reliable.
More about iCloud v iTunes Back Up

How do I make my waveform send one point per iteration in a loop?

Hello,
I am trying to create a demonstration/lab for a future course at my university. I am trying to send data from a wind turbine to a third party DAC in order to run a motor. I have found out that when I send a wave form to the DAC I must send one point per iteration if I use the arbitrary signal generator. I would like to be able to send a file to the DAC without manually loading it as the arbitrary signal generator does. I was wondering how to send the data using one point per iteration using the build waveform or other waveform function that can have the waveform built from a file that is added on the front panel. I am using labview 8.0.
Thanks,
Laura
Message Edited by lhoising on 03-30-2007 01:21 PM
Message Edited by lhoising on 03-30-2007 01:25 PM

Maybe I am asking the wrong question. Maybe I should be asking why it is that when I send a waveform to the the DAC (using active x controls) the signal that is sent to the DAC is just the final value. I probed the wire connected to the data input of the DAOUTPUT node and it shows the entire waveform graph and not just the last value.
Thanks,
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When I try to reformat there is an error message about configurations with the pointing device

When I try to reformat there is an error message about configurations with the pointing device
I am not sure I am on the correct section in the support area for Lenovo.
I had a mouse issue. It was unable to read the mouse. Now the mouse is working and it is initialized.
I have no idea why.
There is an error message saying that I should press F 1or F2. I pressed down F 1 and I tried to work with it and I enabled the mouse or I tried. The mouse is working fine but the computer will not recover completely the way it used to.
It is very confusing. When I shut down and restart there is an message that was not there before about the pointing device. Also the recovering operation never asked me for disks. Now it is doing that. I have disks but this is all confusing. I just want the computer to be the way it was. It is working fine except for booting up and the messages.

Hi marissa, welcome to the forums,
you may or may not be in the right place, but it would certainly help members to help you if you could post exactly which Lenovo system; notebook / computer, you have and which operating system is installed on it.
Thanks in advance
Andy ______________________________________
Please remember to come back and mark the post that you feel solved your question as the solution, it earns the member + points
Did you find a post helpfull? You can thank the member by clicking on the star to the left awarding them Kudos Please add your type, model number and OS to your signature, it helps to help you. Forum Search Option T430 2347-G7U W8 x64, Yoga 10 HD+, Tablet 1838-2BG, T61p 6460-67G W7 x64, T43p 2668-G2G XP, T23 2647-9LG XP, plus a few more. FYI Unsolicited Personal Messages will be ignored.
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I have a problem with ( AppleSyncNotifier.exe - Entry Point Not Found ) The procedure entry point sqlite3_wal_checkpoint could not be locate in the dynamic link library SWLite3.dll.

I have a problem with ( AppleSyncNotifier.exe - Entry Point Not Found ) The procedure entry point sqlite3_wal_checkpoint could not be locate in the dynamic link library SWLite3.dll.

With Windows Explorer, navigate to your C:\Program Files\Common Files\Apple\Apple Application Support folder.
Copy the SQLite3.dll that you should find there, navigate to the nearby Mobile Device Support folder, and Paste it in there also.
Reboot and see if all is well
In case that your OS is Windows 7 (64 bit)
1. Open windows explorer, go to location C:\Program Files (x86)\Common Files\Apple\Apple Application Support
2. Copy file "SQLite3.dll"
3. Open new windows explorer, to to location C:\Program Files (x86)\Common Files\Apple\Mobile Device Support
4. Paste file "SQLite3.dll" to the location.
5. Reboot your computer, it should not display that message, it should be clear.
Good Luck

TS1717 since updating itunes yesterday I now can't open it and get a pop up box about the procedure entry point not being located. anyone able to help?

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thanks for your response roaminggnome. I changed my password immediately after it happened and I have contacted i tunes to let them know of this dillemma.
The I-tunes credit was a promotional thing by Apple to buy their laptop. So I didn't pay for the i-tunes credit in the first place. Do you think my bank will be able to reinburse Itunes credit then? I will ask support when they get back to me.

Looking advice about mounting 3500i access points (AP) to the ceiling

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The ceiling is an Armstrong suspended ceiling with 24" mineral fiber drop ceiling...
What are recommendations and best practice - mount AP under or above the ceiling?
Initially, I considered the mounting options from Oberon Inc. (p/n :1064-00), but given the difficulty by purchasing this product in my country have to consider other options...
I must say that the decision to mount the access point to the ceiling like this:
does not really to my liking...
Now I looking a version of the mount АP with flush-mount kit for tiled ceilings (AIR-AP-BRACKET-3=)...
What are your recommendations?

What are recommendations and best practice - mount AP under or above the ceiling?
Do NOT install the WAP inside the ceiling cavity (hidden from view) as it will cause signals to degrade.
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JMS Sender Communication Channel problem

Hi XI gurus!!
I have a JMS Sender Communication Channel that cannot get information from JMS TIBCO queue.
In defaultTrace.XX.trc I see the following information and errors:
#1.#00144F249F1500C70000087D00002D8300044A22A193A198#1207412506993#com.sap.aii.adapter.jms.core.connector.ConnectorImpl#sap.com/com.sap.xi.mdt#com.sap.aii.adapter.jms.core.connector.ConnectorImpl.buildConnection()#EFFIGUEIREDO#7191##sappix02_X02_21291150#XIAPPLUSER#81664000032811ddaadc00144f249f15#SAPEngine_Application_Thread[impl:3]_52##0#0#Path##Plain###Exiting method#
#1.#00144F249F1500C70000087E00002D8300044A22A193A201#1207412506993#com.sap.aii.adapter.jms.core.connector.ConnectorImpl#sap.com/com.sap.xi.mdt#com.sap.aii.adapter.jms.core.connector.ConnectorImpl.buildSessions()#EFFIGUEIREDO#7191##sappix02_X02_21291150#XIAPPLUSER#81664000032811ddaadc00144f249f15#SAPEngine_Application_Thread[impl:3]_52##0#0#Path##Plain###Entering method#
#1.#00144F249F1500C70000087F00002D8300044A22A193A552#1207412506993#System.err#sap.com/com.sap.xi.mdt#System.err#EFFIGUEIREDO#7191##sappix02_X02_21291150#XIAPPLUSER#81664000032811ddaadc00144f249f15#SAPEngine_Application_Thread[impl:3]_52##0#0#Error##Plain###2008-04-05 17:21:46 [161906789 SAPEngine_Application_Thread[impl:3]_52] [TIBCO EMS]: createQueueSession qsess=198151 qconn=45502 tran=true ackmode=1#
#1.#00144F249F1500C70000088000002D8300044A22A193A670#1207412506994#com.sap.aii.adapter.jms.core.connector.ConnectorImpl#sap.com/com.sap.xi.mdt#com.sap.aii.adapter.jms.core.connector.ConnectorImpl.buildSessions()#EFFIGUEIREDO#7191##sappix02_X02_21291150#XIAPPLUSER#81664000032811ddaadc00144f249f15#SAPEngine_Application_Thread[impl:3]_52##0#0#Info##Java###Sucessfully created session {0} for profile {1}#2#com.tibco.tibjms.TibjmsQueueSession@3a5f233#
{GenericConnectionProfileImpl
{Description=ConnectionProfile of channel: JMS_Sender_loginCheckReq_001on node: 21291150 having object id: 7e7ee107bc2031d2bc79fa2fce15bbed,
JmsMessageSelector=,
ConnectionFactoryConstructor=null,
ConnectionFactoryFactoryInvocation=null,
ConnectionFactoryInvocations=[],
DestinationConstructor=
{ConstructorInvocation
{className=null,
invokeParams=[]
DestinationInvocations=[],
MessageInvocations=[],
DestinationName=null,
User=,
Password=,
isJmsSessionTransacted=true,
InitialContextEnvironment={java.naming.provider.url=190.10.0.133:9222, java.naming.factory.initial=com.tibco.tibjms.naming.TibjmsInitialContextFactory},
LookupConnectionFactory=QueueConnectionFactory,
LookupDestination=GALP.PRD.TIGERC.LOGIN.REQ,
SerializedConnectionFactoryPath=null,
SerializedDestinationPath=null,
Flags=0000000000000000000000000000000000000000000000000000100000000010
#1.#00144F249F1500C70000088100002D8300044A22A193A7EE#1207412506994#com.sap.aii.adapter.jms.core.connector.ConnectorImpl#sap.com/com.sap.xi.mdt#com.sap.aii.adapter.jms.core.connector.ConnectorImpl.buildSessions()#EFFIGUEIREDO#7191##sappix02_X02_21291150#XIAPPLUSER#81664000032811ddaadc00144f249f15#SAPEngine_Application_Thread[impl:3]_52##0#0#Path##Plain###Exiting method#
#1.#00144F249F1500C70000088200002D8300044A22A193A85F#1207412506994#com.sap.aii.adapter.jms.core.connector.JndiConnectorImpl#sap.com/com.sap.xi.mdt#com.sap.aii.adapter.jms.core.connector.JndiConnectorImpl.createDestination()#EFFIGUEIREDO#7191##sappix02_X02_21291150#XIAPPLUSER#81664000032811ddaadc00144f249f15#SAPEngine_Application_Thread[impl:3]_52##0#0#Path##Plain###Entering method#
#1.#00144F249F1500C70000088300002D8300044A22A193B153#1207412506997#System.err#sap.com/com.sap.xi.mdt#System.err#EFFIGUEIREDO#7191##sappix02_X02_21291150#XIAPPLUSER#81664000032811ddaadc00144f249f15#SAPEngine_Application_Thread[impl:3]_52##0#0#Error##Plain###2008-04-05 17:21:46 [161906789 SAPEngine_Application_Thread[impl:3]_52] [TIBCO EMS]: createQueueConnection qconn=45503 qconfac=QueueConnectionFactory[url=tcp://190.10.0.133:9222;clientID=null;Properties={}] user=null#
#1.#00144F249F1500C70000088400002D8300044A22A193E3CF#1207412507009#com.sap.aii.adapter.jms.core.connector.JndiConnectorImpl#sap.com/com.sap.xi.mdt#com.sap.aii.adapter.jms.core.connector.JndiConnectorImpl.createDestination()#EFFIGUEIREDO#7191##sappix02_X02_21291150#XIAPPLUSER#81664000032811ddaadc00144f249f15#SAPEngine_Application_Thread[impl:3]_52##0#0#Path##Plain###Exiting method#
#1.#00144F249F1500C70000088500002D8300044A22A193E571#1207412507010#com.sap.aii.adapter.jms.core.connector.ConnectorImpl#sap.com/com.sap.xi.mdt#com.sap.aii.adapter.jms.core.connector.ConnectorImpl.executeDestinationInvocations#EFFIGUEIREDO#7191##sappix02_X02_21291150#XIAPPLUSER#81664000032811ddaadc00144f249f15#SAPEngine_Application_Thread[impl:3]_52##0#0#Path##Plain###Entering method#
#1.#00144F249F1500C70000088600002D8300044A22A193E64B#1207412507010#com.sap.aii.adapter.jms.core.connector.ConnectorImpl#sap.com/com.sap.xi.mdt#com.sap.aii.adapter.jms.core.connector.ConnectorImpl.executeDestinationInvocations#EFFIGUEIREDO#7191##sappix02_X02_21291150#XIAPPLUSER#81664000032811ddaadc00144f249f15#SAPEngine_Application_Thread[impl:3]_52##0#0#Path##Plain###Exiting method#
#1.#00144F249F1500C70000088700002D8300044A22A193E714#1207412507010#com.sap.aii.adapter.jms.core.connector.ConnectorImpl#sap.com/com.sap.xi.mdt#com.sap.aii.adapter.jms.core.connector.ConnectorImpl.buildMessageProducers()#EFFIGUEIREDO#7191##sappix02_X02_21291150#XIAPPLUSER#81664000032811ddaadc00144f249f15#SAPEngine_Application_Thread[impl:3]_52##0#0#Path##Plain###Entering method#
#1.#00144F249F1508770000000000002D8300044A22A83A6308#1207412618584#System.err#sap.com/com.sap.xi.mdt#System.err#EFFIGUEIREDO#7191##sappix02_X02_21291150#XIAPPLUSER#81664000032811ddaadc00144f249f15#Thread[TIBCO EMS TCPLink Reader (45502),5,SAPEngine_Application_Thread[impl:3]_Group]##0#0#Error##Plain###2008-04-05 17:23:38 [2092826462 TIBCO EMS TCPLink Reader (45502)] [TIBCO EMS]: received msg from daemon conn=45502 seqid=40664365 msgid=ID:EMS-SERVER.91446ECB042B480:12545#
#1.#00144F249F1508770000000100002D8300044A22A83A650C#1207412618585#System.err#sap.com/com.sap.xi.mdt#System.err#EFFIGUEIREDO#7191##sappix02_X02_21291150#XIAPPLUSER#81664000032811ddaadc00144f249f15#Thread[TIBCO EMS TCPLink Reader (45502),5,SAPEngine_Application_Thread[impl:3]_Group]##0#0#Error##Plain###2008-04-05 17:23:38 [2092826462 TIBCO EMS TCPLink Reader (45502)] [TIBCO EMS]: post msg to session sess=198151 cons=261547 seqid=40664365 msgid=ID:EMS-SERVER.91446ECB042B480:12545#
In the last two lines we can see that SAP XI do a connection to TIBCO and is getting an unknown error, even in debug (note 856346) I cannot get any information.
Actually we are running SAP XI 3.0 SP21, but this was working fine in SAP XI 3.0 SP17. We have more than 100 Communication Channels working fine and only is having this strange behavior.
BTW if we put manually information in TIBCO QUEUE it works fine, but automatically doesn't pick the message.
Thanks

HI,
As per the trace details given please consider few of the below options....
What do u see in adapter monitoring tool for JMS adapter?
http://hostname:5XX00/mdt/amtServlet
Did you follow the document on correlation of JMS messages?
In communication channel You have to set
Correlation ID -> XI conversationID
XI message ID->GUID
XI Conversation ID -> JMS correlation ID.
Now in the custom J2EE application you should set
jmscorrelationid of message before sending in to queue to jms correlation id of message before receiving from the queue.
This thread deals with the issue..
JMS Queue monitoring
Check if the JMS Sender adapter EOIO is with serialized messages
Thanks
Swarup

Concurrency for JMS Sender Adapter - Async/Sync Bridge

Hi,
We have implemented a number of Async/Sync bridges using JMS Adapters, and are encountering problems scaling the solution.
Async-Sync Bridge Scenario:
JMS Sender Adapter -> Integration Server -> Sync ABAP Proxy (CRM) -> JMS Receiver Adapter
The bridge is using the Adapter Framework modules: RequestResponseBean & ResponseOnewayBean within the Sender Adapter.
The problem is that concurrency of processing seems to be driven from the number of Java Server Cluster Nodes on the Adapter Engine. The JMS sender adapters do not appear to read from the external messaging system (MQ) in a concurrent fashion. They appear to process in a sequential manner per Adapter:
1. Read from request Message Queue (MQ)
2. Send request for processing (IS)
3. Wait response message
4. Receive response message
5. Write response message to Message Queue (MQ)
6. Read from request Message Queue (MQ)
7. Send request for processing (IS)
8. Wait response message
9....
We need to be able to introduce some means of scaling the solution so that mesages can be read from the MQ request message queue in a concurrent manner. Hopefully we can do this without adding more javer server nodes to the Adapter Engine.
We were looking intot he possibility of tuning AS Java properties that control the number of connections to the Messaging System of the Adapter Engine but this has not provided a solution.
Any information on this topic would be much appreciated.
regards
Murray

As far as I know, the only wasy for JMS adapter to do concurrent reads from a queue is by having multiple server nodes. This is document in note 856346, point 6.2
Thanks
KK

Problem about space management of archived log files

Dear friends,
I have a problem about space management of archived log files.
my database is Oracle 10g release 1 running in archivelog mode. I use OEM(web based) to config all the backup and recovery settings.
I config "Flash Recovery Area" to do backup and recovery automatically. my daily backup schedule is every night at 2:00am. and my backup setting is "disk settings"--"compressed backup set". the following is the RMAN script:
Daily Script:
run {
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recover copy of database with tag 'ORA$OEM_LEVEL_0';
backup incremental level 1 cumulative copies=1 for recover of copy with tag 'ORA$OEM_LEVEL_0' database;
the retention policy is the second choice, that is "Retain backups that are necessary for a recovery to any time within the specified number of days (point-in-time recovery)". the recovery window is 1 day.
I assign enough space for flash recovery area. my database size is about 2G. I assign 20G as flash recovery area.
now here is the problem, through oracle online manual, it said oracle can manage the flash recovery area automatically, that is, when the space is full, it can delete the obsolete archived log files. but in fact, it never works! whenever the space is full, the database will hang up! besides, the status of archived log files is very strange, for example, it can change "obsolete" stauts from "yes" to "no", and then from "no" to "yes". I really have no idea about this! even though I know oracle usually keep archived files for some longer days than retention policy, but I really don't know why the obsolete status can change automatically. although I can write a schedule job to delete obsolete archived files every day, but I just want to know the reason. my goal is to backup all the files on disk and let oracle automatically manage them.
also, there is another problem about archive mode. I have two oracle 10g databases(release one), the size of db1 is more than 20G, the size of db2 is about 2G. both of them have the same backup and recovery policy, except I assign more flash recovery area for db1. both of them are on archive mode. both of nearly nobody access except for the schedule backup job and sometime I will admin through oem. the strange thing is that the number of archived log files of smaller database, db2, are much bigger than ones of bigger database. also the same situation for the size of the flashback logs for point-in-time recovery. (I enable flashback logging for fast database point-in-time recovery, the flashback retention time is 24 hours.) I found the memory utility of smaller database is higher than bigger database. nearly all the time the smaller database's memory utility keeps more than 99%. while the bigger one's memory utility keeps about 97%. (I enable "Automatic Shared Memory Management" on both databases.) but both database's cup and queue are very low. I'm nearly sure no one hack the databases. so I really have no idea why the same backup and recovery policy will result so different result, especially the smaller one produces more redo logs than bigger one. does there anyone happen to know the reason or how should I do to check the reason?
by the way, I found web based OEM can't reflect the correct database status when the database shutdown abnormally. for example, if the database hang up because of out of flash recovery area, after I assign more flash recovery area space and then restart the database, the OEM usually can't reflect the correct database status. I must restart OEM manually to correctly reflect the current database status. does there anyone know in what situation I should restart OEM to reflect the correct database status?
sorry for the long message, I just want to describe in details to easy diagnosis.
any hint will be greatly appreciated!
Sammy

thank you very much, in fact, my site's oracle never works about managing archive files automatically although I have tried all my best. at last, I made a job running daily to check the archive files and delete them.
thanks again.

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