One instance of two-instance RAChang

Hi all,
I am having a big problem with instance hanging. I happened 5 times in this month.
Server: HP-UX B.11.23 U ia64, 32 GB RAM/each , 4 CPU/each
Cluster: Verita VCS 5
Oracle database: 10.2.0.3
Symptom:
1. One of the instance hang while the other one of the RAC has no problem. But the hanging instance was different for the different incidents. When the instance hang, can login to the other good instance, but could not select from GV$ view such as gv$nstance. The hang last about 30 minutes and resolved by itself. After it get back normal, everything seems good.
2. By hang, I mean no connection could be made from remote, from local machine even as sysdba.
3. When the instance hang, the other instances on the same machine (not the same RAC) was fine. Can be connected from remote - meaning listener was fine.
4. This symptom never showed up until recently we migrated some more data to this database and meanwhile we increased the RAM from 8 GB to 32 GB - but the swap space remained the same 12 GB as before. I pointed out the swap space could be a issue, but Sys admin insists it is fine.
Anyone has had similar issue or any clue, please help.
Thanks in advance.

Metalink hosts a file called hanganalyze.sql
Also, the first question one needs to answer for any performance problem is 'What is it waiting for'. This info can be obtained from views like (g)v$system_event, (g)waitstat etc.
Please note all gv$ views use Parallel Query to run a query on the other node.
Your problem might be in Parallel Query.
Also, the performance of the Interconnects is crucial to the performance of the cluster. You need to investigate this.
Hth
Sybrand Bakker
Senior Oracle DBA

Similar Messages

One instance and two databases?

Hello, I've installed oracle database on my server. I've read a lot of documentation to learn the basic concepts.
Ok, I have a question. I have read that one instance only can manage ONE database. Is it true? If it's true, how on earth I can create two database? for example, I want to create database-one and database-two.
I would create these with CREATE DATABASE command. How does Instance know if I want to access to database-one or database-two. How I indicate it in initilitation parameter file of my instance?
In sumary, Can one instance works with two databases?

Look at the following output. If I do not set my ORACLE_SID variable, the 9.2.0.7 client connects to the 9.2.0.7 database instance. If I set my ORACLE_SID , the same 9.2.0.7 client now connects to the 10.2.0.1 database (the database specified in the ORACLE_SID variable).
C:\>set ORACLE_SID=
C:\>sqlplus kkishore/kkishore
SQL*Plus: Release 9.2.0.7.0 - Production on Mon Jul 17 09:27:55 2006
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.7.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.7.0 - Production
SQL> exit
Disconnected from Oracle9i Enterprise Edition Release 9.2.0.7.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.7.0 - Production
C:\>set ORACLE_SID=ORA10GR2
C:\>sqlplus kkishore/kkishore
SQL*Plus: Release 9.2.0.7.0 - Production on Mon Jul 17 09:29:31 2006
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL> disconnect
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL>Message was edited by:
Kamal Kishore

One instance for two different application

Hello,
I have to solve following problem..
need have one instance of object for two different application..fist is standard SE application and second is EE (web)..
SE application is a server..listen on and accepting connection from mobile phone..and EE application need to show list of connected devices and should say to SE application that new device was connected..
I would like to do this without database..only server and web app..
I have thought about RMI..but hope there is more simple solution..
Thanks a lot for your ideas.
Dmitrij

I would like to do this without database..only server and web app..You have your reasons for wanting this to be the case. If you are sure you don't want a DB, then pass the state of the object between the two ends using XML as the transport form. As someone said, you can use JMS or you can write an HTTP POST or probably other transport mechanisms other people will suggest to actually get it over the wire from one side to the other.
As to your question of how to sync state, just make the object you're sharing final after it's been created (on the side that creates it) and make the reference that receives it and holds it final also, after you've reconstructed it from the XML you received.

Why are there two ns-httpd processes running for one instance of iws 6

Hi all,
I'm used to iWS 4.x where there's only one watchdog and one ns-httpd process running for any given install of iWS. Now in iWS 6.x I noticed there are two processes for the admin server and two processes for the actual single web server instance, along with two watchdogs.
What are the extra web server instances doing? I noticed that there is a 'parent' relationship with the pid's, so I guess one is spawning the other, but why? If it's to have persistent state over restart, isn't that what uxwdog is for?
Thanks in advance,
James Huang

goldeye wrote:
$ ps -ef|grep ns-httpd
root 5612 5611 0 May 09 ? 2:22 ns-httpd -d /u00/iplanet/server6/https-admserv/config
root 5613 5612 0 May 09 ? 5:30 ns-httpd -d /u00/iplanet/server6/https-admserv/configThis is Administration Server
root 22940 22939 3 May 16 ? 155:11 ns-httpd -d /u00/iplanet/server6/https-eagnmnsu24f.xxxx.gov/config
nobody 23040 22940 0 May 16 ? 136:35 ns-httpd -d /u00/iplanet/server6/https-eagnmnsu24f.xxxx.gov/configThis is Web Server instance.
Can you send the output of ps -ef|grep iplanet ?
iplanet Web Server is very old please move to latest Web Servers.
You can download latest Web Servers from [http://www.sun.com/download/index.jsp?cat=Web%20%26%20Proxy%20Servers&tab=3&subcat=Web%20Servers].
Please use either of the two
Sun Java System Web Server 7.0 update 5 (release notes are located @ [http://wikis.sun.com/display/WebServerdocs/Release+Notes]) or
Sun ONE web Server 6.1 SP11 ( release notes are located @ [http://docs.sun.com/app/docs/doc/820-7659]).
Migration Guide will help you in migration [http://wikis.sun.com/display/WebServerdocs/Installation+and+Migration+Guide] or let us know if you have any problems.
When I start Sun Java System Web Server 7.0 or Sun ONE 6.1 Server instance, I can see one watchdog and two webservd processes :
$ps -ef|grep /export2
user 7967 7966 ... webservd -r /export2/ws -d /export2/ws/https-....
user 7966 7965 ... webservd -r /export2/ws -d /export2/ws/https-...
user 7965 1 ... ./webservd-wdog -r /export2/ws -d /export2/ws/https-...

Which is better? Two Oracle user in one instance OR in two instances?

Which is better?
I could not find any benchmark for number of instances per user
in the same machine.
suppose that you have two major Oracle user, from performance
point of view it is better to make separate instances in same
machine or keep these two users in the same instance.

Hi.
I understand that you will use oracle for two different
applications on the same host.
Each instance has its SGA and background processes. So, using
two different schemas(users) in one instance you can share
phisical memory between the applications. Concerning background
processes, you can start as many of them as you wish, so it's
not a problem. If you decided that one DBW is not enough, you
could configure oracle to use two or more.
best regards,
Andrew

One instance registered in two rman catalogs is possible?

Customer wants that one instance be registered in two different rman catalogs.
and perform two different backups.
There is a sincronism between control file and Catalog, what could mess it up having two catalogs. On the other hand there is the DBID who identify the database on each catalog.
Can anyone clarify if this is possible or not?
TX

Lalbuque,
RMAN performs a backup using a "Media Manager Layer" or "MML". There can only be one MML installed at once on a particular ORACLE_HOME and it seems that yours is TSM; you cannot run an RMAN backup to tape without an MML. This is true even if you backup WITHOUT a catalog so adding a second will not help.
There are a number of solutions to this problem. Here are a couple.
Firstly, you could backup your database to the non-TSM tapes without RMAN. You can do this either by shutting the database down first or you could put the database into backup mode for the duration of the backup. The former is simpler but a) requires an outage and b) requires you to be absolutely sure that your shutdown was clean. The latter requires some detailed knowledge of oracle backup concepts but avoids the other problems.
The second solution is to backup your database to disk with RMAN and then to copy the resultant files to tape.
Whatever solution you choose please bear three things in mind:
1) The purpose of backup is to recover. Make sure you have a documented recovery process and test it.
2) The use of a second catalog is not required.
3) Test your ability to recover. Have I said that already :-)
--Tony Hasler

Can i create more than one instance for single database?

HI
anybody can tell me how to create more than one instance for single database(without using RAC)?
thanks
Kalanidhi

Anandji,
I sometimes think differently. I also think like what this person is asking..(although I have installed and administering 5 different RAC databases)
The main doubt of mine is that we create multiple instances accessing the same storage area.
Anyway the controlfiles of all instances will have the same information except the instance_names and instance id's.
Hence I always think , why can't it be possible to to create another instance in the same system and point it to a controlfile which is copied from the other instance.
Why can't the same files be shared between the two instances in a same system ?
I know I am thinking a little bit confusing...
Anyway I need to test that also...
Mahesh.

How to install more than one instances on one machine

Hi ALL,
I want to install more than one instances on one machine, but i am a freshman on SAP field. How and where can i get the related infomation for that? thank you very much !!

Hi tieyan,
Glad the information was of some help.
For Windows, there is an older note <a href="http://service.sap.com/sap/support/notes/28392">28392</a> that has some more information. It is important also that the SAP parameter PHYS_MEMSIZE is sized correctly according to note <a href="http://service.sap.com/sap/support/notes/88416">88416</a> (the bottom of the note gives some examples). For example, if there were two central instances and the two Oracle database instances on one host, PHYS_MEMSIZE for both instance profiles (of the central instances) would be 35% of the RAM (1/2 of 70%). In the case of MSSQLSRV 2000, for PHYS_MEMSIZE you would refer to the scenarios of note <a href="http://service.sap.com/sap/support/notes/327494">327494</a>.
If you ever want to thank somebody else for helping in answering a question, the <a href="https://wiki.sdn.sap.com/wiki/display/HOME/RulesofEngagement">Rules of Engagement</a> has a section 'Thank Others by Giving Points' that explains this further.
Regards, Mark

Can one instance have multiple redo threads ?

i was reading the Oracle Data guard 10g guide and it says
Determine the appropriate number of standby redo log file groups.
Minimally, the configuration should have one more standby redo log file group than the number of online redo log file groups on the primary database. However, the recommended number of standby redo log file groups is dependent on the number of threads on the primary database. Use the following equation to determine an appropriate number of standby redo log file groups:
(maximum number of logfiles for each thread + 1) * maximum number of threads
Using this equation reduces the likelihood that the primary instance's log writer (LGWR) process will be blocked because a standby redo log file cannot be allocated on the standby database. For example, if the primary database has 2 log files for each thread and 2 threads, then 6 standby redo log file groups are needed on the standby database
while Oracle's definition of redo log states the following
Redo Threads
When speaking in the context of multiple database instances, the redo log for each database instance is also referred to as a redo thread. In typical configurations, only one database instance accesses an Oracle Database, so only one thread is present. In an Oracle Real Application Clusters environment, however, two or more instances concurrently access a single database and each instance has its own thread of redo.
this is confusing, in a typical environment where only one instance accesses a database, can we have more than one redo thread ?

Though you can create multiple threads but of no use in NON-RAC or non-parallel server configuration.
Following is the generic formula. You should consider
maximum number of threads = 1 for single instance (NON-RAC).
(maximum number of logfiles for each thread + 1) * maximum number of threads
Message was edited by:
Reega

Getting Error :- Only one instance of COBRAS Export can be running at a time

Hi All,
I was checking the Briefcase Mode help file and it mentions for Unity Conection
that COBRAS will run multiple instances of itself – if you schedule multiple backups to fire up at the same time they will all run at the same time.
However if I schedule multiple backups to fire at the same time then I get the error :- "Only one instance of COBRAS Export can be running at a time".
This also happens if the COBRAS windows is left open and the scheduled backup starts in the background.
http://www.ciscounitytools.com/Applications/General/COBRAS/Help/COBRAS_Briefcase/COBRAS_Briefcase.htm#_Toc276653845
I am not sure if I am making a mistake in understanding the statement :- "COBRAS will run multiple instances of itself – if you schedule multiple backups to fire up at the same time" or do we need to add any switch like lot of other application need like /m etc in the field of the scheduled backups as I see as /silent switch for process to run in background automatically but none for multiple instances.
I am attaching the screen shots of the errors I got when
A.) I scheduled 2 backups to run at the same time and the COBRAS application window was open "COBRASExportCUC7.exe" was running and no backup took place and got errors for both the scheduled backups.
And
B.) I scheduled 2 backups to run at the same time and the COBRAS application window was closed off and "COBRASExportCUC7.exe" was not running and one of the scheduled backups started to work and the other one gave error and didn't work
Unity Connection in use :- Version 8.0.3.20000-18
Cobras Export :- Version 1.0 Build 76
Please Suggest.
Regards,
Prad
(E-Mail :- [email protected])

Yeah, I’m of two minds on that – on the one hand it’s bad style to have a scheduled application popping dialog boxes (especially if you’re running as an account you don’t log in as regularly) – one the other hand I did have some sites go a while not noticing backups were failing (due to a UNC not flying any longer after a server reconfig) – folks can be bad about checking log files or the event log for issues. A pop up would pretty much guarantee they’d notice on next login at any rate.
I think I may stitch in email notifications in COBRAS Export in the same way they’re in the User Data Dump so failures of scheduled backups would be noticed right away (big, bright email in your box saying “failed!” would do it).
Either way, I’ll update the help and make sure it fails quietly for now when I update some other items on the site middle of next week.
Thanks for the report.

WebLogic Error : Registered more than one instance with the same objectName

HI there, I'm facing a big problem. I have two environments installed on the same physical machine.
I have ALSB and WLI servers running out there.
Environment 1 - WLI port running at 7011 domain name : stp_wli_domain and ALSB port running at 8011 domain name: stp_alsb_homo1 - folders- stp_wli_domain / stp_bea_alsb_homo
Environmnet 2 - WLI port running at 7211 domain name : stp_wli_domain2 and ALSB port tunning at 8211 domain name : stp-alsb_homo2 - folders - stp_wli_domain2 / stp_bea-alsb_homo2
Everything was working fine, but these days I had install new deployments on both environment and I got this error :
java.lang.IllegalArgumentException: Registered more than one instance with the same objectName : stp_wli_domain:ServerRuntime=wli_wls01,Name=stp_wli_domain,Location=wli_wls01,Type=AIRuntime new:com.bea.wlai.management.AIRuntimeMBeanImpl@bcf22dc existing com.bea.wlai.management.AIRuntimeMBeanImpl@de02e6c
The weird is : There is no same object name, as you can see, domains are different, folders are different and ports are diferrent, including multicast addresses.
Have you guys seen this before ?
I'm under pressure here, 'cause some projects had stopped to work.
Please I would appreciate any help.
Tks.
Edson

HI there, thanks for attention..
See ...
There's a lot of confusion with these env's .
I did not built this, so... I'm cleaning my hands.... anyway... :)
I must fix....
Well basically if we have two env's, so we have different project each one right ?
Ok, but I was told that if you have on the same network and same physical machine the name of AdminServer as "AdminServer" in all domains, so it goes with problems... I never heard about it... but is a good practice you put the names for example :
WLI - WLIAdminServer
ALSB - AlsbAdminServer
WLI2 - WLiadminServer2
ALSB2 - ALsbAdminServer2
I would do it.. this way..
But how it wasn't me...
We got..
WLI - WliAdminServer
ALsb - AdminServer
WLI2 - AdminServer
ALsb2 - AdminServer
Have you got it ?
So... I was told that this could be a problem, almost all AdminServers with the same name... guess what ?Some Projects are back to work. but not at all.. only some.. so I 'm breathing better now... but I would like to know if you seen this before ?
I would appreciate your help again.
Unfortunately there's no detailed stack trace to track this
Tks.

Allowing only ONE instance of a PDF to be open

I'm trying to work out a new system for proofreading and commenting in our business using the Comment and Markup tools in Acrobat 8 Professional. I'd like to allow multiple users on a network to interact and markup a PDF easily. I'd like to make it so that one of two things can happen:
a) Only one instance of a PDF can be opened at once on the same network. That is to say, if a user on one computer opens a PDF, another user on the network on a different computer cannot open that same PDF at all, until the first user has closed it. Also, I'm not sure if the functionality for this would be implemented in Acrobat or the operating system (Mac OS X 10.6, to be precise).
b) Multiple users can open a PDF simultaneously, and markups and comments from all users are somehow saved.
I'm sure it's more of a possibility for a) to happen, but perhaps I'm wrong. Anyway, I hope there is a solution out there! Thanks for all your help!

George,
Thank you for your helpful reply. It does appear that Shared Reviews is capable of providing our business exactly what we need in this regard. I have found that Acrobat 8 does support Shared Reviews, but it only does so with Network Folder locations and WebDAV folders as locations for comment servers. I know how to get to the process to set up Shared Reviews, but not how to designate or set up a folder as a comment server using Network Folders or WebDAV. Unless you just so happen to know about that process as well, I will post a new thread, since the problem of finding a solution has been solved, but the new problem of implementing it has risen.
Although using Acrobat X Pro to share PDFs and collaborate automatically using Acrobat.com sounds mighty tempting...

Can't select more than one instance

Hi All,
wonder if anyone can help,
I'm trying to get Qmaster to use more than one core(instance). but the options for selected service is greyed out for compressor, and its stuck on 1 instance, "Rendering" service is allowing me to change instances, but not compressor. Ive done a search, and as a result have reset background processing. I dont have mobile me so Back to my mac doesn't apply either.
I have a mac pro 2.93 eight core running OS 10.6.2 on 16gig of ram - compressor is v3.5.1
many thanks in advance
Andy

The 50% rule is for the first round of MacPros which could run one instance per core. The current models can run two instances per core. Check Barefeets.com for current processor testing and qmaster configuration recommendations
One of the time limiting issues with running more and more instances is that your output file is cut into more and more segments. If all the cores are fully loaded you will not find faster encodes with more cores specified in the Qmaster but you may have slower overall project completion times. This is due to the overhead in recombining all the smaller clips back into the final file. Fewer but larger clips seem to recombine faster than more but smaller.
again, ymmv.
x

Oracle 9i database is not mounted on one instance

platform: IBM AIX
db version: oracle 9i two node rac
due to network problems one of the instance is down,after server restart the database is not mounting.just it is hanging.alert log has no information.
please help

Nagendra T wrote:
platform: IBM AIX
db version: oracle 9i two node rac
due to network problems one of the instance is down,after server restart the database is not mounting.just it is hanging.alert log has no information.What is the status of the instance, You can check from other node(instance) also.
If try to startup instance, any errors from SQL?
No information in alert log file? Are you chcking in right alert logfile?
Check any background processes are running or not?
$ps -ef|grep pmon
However one instance running, So you can kill that session which is not running and start again.

Only letting one instance of my application run

hi guys,
My application will allow the user to interact with the database. The database will be stored on a local machine, and not on a network, so that only one person can access it at a time.
The problem is, I believe a user can launch two instances of my application simultaneously, and therefore there are potential problems.
So I want the user to only ever be able to launch one instance of the JFrame through which all interactions to the DB are made.
So MyApp.java contains
class MyApp
public void main (String[] args)
MyFrame mF = new MyFrame();
}Now, is it the right idea of mine to make mF singleton? Or is it the wrong approach?
But what is confusing me is...if at the java prompt I type
java MyApp
and then I type, once again
java MyApp
will these two be treated as two completely different running of programs? Say I had mF as a singleton. Does this mean there can exist one instance of mF in each of my two different runnings of MyApp, or are the two somehow connected, which means that if I ran MyApp a second time theer'll be some sort of error cos mF already exists and cos it is a singleton, it can't exist twice?
Sorry if I havent made myself clear. I'm very confused myself.
Thanks.
AU

My application will allow the user to interact with
the database. The database will be stored on a local
machine, and not on a network, so that only one
person can access it at a time.If using jdbc then local or remote only really effect your database driver choice not your code.
The problem is, I believe a user can launch two
instances of my application simultaneously,Yes.
and therefore there are potential problems. Potential but not that difficult to avoid.
So I want the user to only ever be able to launch one
instance of the JFrame through which all interactions
to the DB are made.If you think about responsibilities, then data integrity is not the responsibility of the UI, its the responsibility of the DBMS.
Now, is it the right idea of mine to make mF
singleton? Or is it the wrong approach?A Singleton will only ensure that a jre has a single instance. If you start multiple instances of the jre then there can be one instance of the application in each.
The best solution is to use your databases normal locking process through the JDBC api
The simplest solution is for your program to lock either the database, the table or the record you are interested in. You can do this by creating a lock record on a seperate table. If the insert fails to create the record, somebody else is already using the dataset. If it succeeds then is available. You will need a way to forcible clear the lock if your application stops unexpectedly.

Apex application connecting to more than one instance

My company is in evalutation mode. We currently have a Forms and Reports 10g application (using Oracle Application Server 10g...) that allows access to multiple databases that have the same schemas repeated in each, i.e. production, test, etc. The schemas hold the same database objects whether they are in production, test or another instance.
If we migrate the application to APEX, would we have to have the application repeated in each instance or can we have it in one and rely on the database tnsnames.ora file to allow the applicaiton to access the data in that other instance? Or is there another way to be able to keep the application in APEX, in one instance and still allow users to connect to the other databases?
Thank you for your help.
Stacey

Stacey,
When you install Apex in a db instance it creates two schemas. apex_030200 & flows_files.
The apex_030200 schema is the core of apex it contains the files needed to make the app builder, sql workshop, and everything else you use to build an app. It also contains any and all apps built within apex as well by the developer.
Flows_files contains any uploaded files that a developer might upload and want to use.
From their you create a workspace to develop your apps in. You then associate that workspace with one or more schemas on that instance. (It can create the schema or you can use one that already exists) This is your user data
Here is info on the what a workspace is:
Workspace: (From User Guide documentation page 26) http://download.oracle.com/docs/cd/E14373_01/appdev.32/e11838.pdf
Oracle Application Express enables a single database to host large numbers of users.
Users work in a dedicated work area called a workspace. A workspace is a virtual
private database that enables multiple users to work within the same Oracle
Application Express installation while keeping their objects, data and applications
private. This flexible architecture enables a single database instance to manage
thousands of applications.
My suggest would be as what some others have said:
1) Install apex on every instance you want to use
2) Develop your apps on one instance and then export/import the app to the other instances just as you would do with any other software development system.
3) Within the HTTP Server that channels the HTTP requests to the db you can modify the dads.conf file for your apps and use something like:
<Location mycompany.com/apex/test/
<Location mycompany.com/apex/dev/
Within each of these you point to the proper db via a connect string.
By doing this method here you would be using just ONE http server to host out many different environments across an unlimited number of instances, maybe this is what you were trying to get across in your message, maybe not.
Hope this helps,
Justin

One instance of two-instance RAChang

Similar Messages

Maybe you are looking for