Oracle listeners/dispatchers/shared servers

Hi,
Should the Oracle listeners/dispatchers/shared servers be set up to work with
BEA's connection pooling features?
If so how?
Regards
Vaidy

I had observed the same for 10.2.0.1 databases also. I don't see the same.
SQL> show parameter disp
NAME                         TYPE      VALUE
dispatchers                    string      (PROTOCOL=TCP) (SERVICE=v102XD
                               B)
max_dispatchers                integer
Why does DBCA create a shared server by default and it is even setting the dispatcher? post proof
What are the steps to ensure that the database is a dedicated server.Your database is always enabled to allow dedicated server processes,
but you must specifically configure and enable shared server by setting one or more initialization parameters.

Similar Messages

Connecting to the db is taking too long with Shared Servers connection

Hi all
OS: Solaris 11 SPARC 64 bits
DB: 2-node RAC Oracle 11.2.0.3.5
After doing a migration of a 40GBs database from a 9i database to a 11g database, it's takin too long to connect to the db, which is using shared server. In the moment, there aren't any applications using the db, just myself. Doing some tests, i saw that when i use a dedicated connection, i can connect almost instantly, but using the shared connection, it takes almost 4 seconds to connect, via sqlplus. Here are some shared server parameters:
shared_server_sessions               integer
shared_servers                          integer     1
max_shared_servers                   integer     20
dispatchers                               string      (protocol=TCP)(disp=5)
max_dispatchers                        integer     5
lsnrctl service
Instance "INSTANCE", status READY, has 6 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:5 refused:0 state:ready
         LOCAL SERVER
      "D004" established:93 refused:0 current:0 max:1022 state:ready
         DISPATCHER <machine: orahml01, pid: 4073>
         (ADDRESS=(PROTOCOL=tcp)(HOST=hostname)(PORT=65402))
      "D003" established:85 refused:0 current:0 max:1022 state:ready
         DISPATCHER <machine: orahml01, pid: 4070>
         (ADDRESS=(PROTOCOL=tcp)(HOST=hostname)(PORT=44055))
      "D002" established:90 refused:0 current:2 max:1022 state:ready
         DISPATCHER <machine: orahml01, pid: 4066>
         (ADDRESS=(PROTOCOL=tcp)(HOST=hostname)(PORT=41277))
      "D001" established:89 refused:0 current:1 max:1022 state:ready
         DISPATCHER <machine: orahml01, pid: 4062>
         (ADDRESS=(PROTOCOL=tcp)(HOST=hostname)(PORT=61887))
      "D000" established:91 refused:0 current:0 max:1022 state:ready
         DISPATCHER <machine: orahml01, pid: 4060>
         (ADDRESS=(PROTOCOL=tcp)(HOST=hostname)(PORT=44222))
INSTANCE =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = hostname-scan)(PORT = 1521))
      (CONNECT_DATA =
        (SERVER = SHARED)
        (SERVICE_NAME = INSTANCE)
INSTANCE1 =
(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = hostname-vip)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = INSTANCE)
      (INSTANCE_NAME = INSTANCE1)
INSTANCE2 =
(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = hostname-vip)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = INSTANCE)
      (INSTANCE_NAME = INSTANCE2)
) The alert.log doesn't show anything wrong.
What can be causing this issue with shared servers?
Thanks in advance.
Edited by: Fabricio_Jorge on 27/03/2013 06:14

Hello,
Refer to the documentation is a great help.Please have a look at the below link:
http://docs.oracle.com/cd/B10501_01/server.920/a96533/features.htmLook at the part :
Performance of certain database features can improve when a shared server architecture is used, and performance of certain database features can degrade slightly when a shared server architecture is used. For example, a session can be prevented from migrating to another shared server while parallel execution is active.i know that this maynot be the case here but please read this document and apply it as it will help you understand what is going on.
BR
Mohamed ELAzab
http://mohamedelazab.blogspot.com

MTS - Shared servers die when stressed...

RedHat 6.2, Oracle 8.1.5, Running MTS
MTS is up and running, but when I start to stress the box, the background processes and the shared servers just die. This doesn't happen with dedicated servers, only with shared servers. When it happens, it happens fast...boom their dead! I am low on memory, but I have plenty of swap space. I heard there was a problem with MTS on Linux...anyone know the details?
Thanks,
Craig.
null

Craig,
I am using MTS, RH 6.2, and 8.1.6.
After stress testing with my max number of connections for a prolonged period my servers
die. Instance crash.
My test includes connections from a web and telephony server. I'm not totally convinced its a sole MTS issue. My only common denominator in testing is java, so I'm looking further here.
8.1.7 is due for release soon.
What type connections are you making (e.g any web servers ?)
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Craig Shallahamer ([email protected]):
RedHat 6.2, Oracle 8.1.5, Running MTS
MTS is up and running, but when I start to stress the box, the background processes and the shared servers just die. This doesn't happen with dedicated servers, only with shared servers. When it happens, it happens fast...boom their dead! I am low on memory, but I have plenty of swap space. I heard there was a problem with MTS on Linux...anyone know the details?
Thanks,
Craig.<HR></BLOCKQUOTE>
null

Can oracle work in shared and dedicated mode at the same time?

Hi All,
can oracle work in shared and dedicated mode at the same time?
Thanks

A database can work only in one mode at a time.
If the database is started in Dedicated Mode then it can not run in the Shared Mode. If you need to run it in the Shared Mode, bring down the Database , change DISPATCHERS, SHARED_SERVER, SHARED_SERVER_SESSIONS parameters in initfile and bring up the database to run it in Dedicated Mode.
But there is one catch here, if you have started the database in Shared Server Mode even then you can make a Dedicated connection to server.
Thanks!
M-

Dedicated server vs multi threaded server archcitechture ( shared servers)

http://www.dba-oracle.com/t_mts_multithreaded_servers_shared.htm
1. I read the above for dedicated server vs multi threaded server archcitechture ( shared servers), please make it easy for a novice like me to understand in brief. Is the difference between the two only that MTS spawn multiple virtual servers which share and same memor ?
2. How does the dedicated server work right from a db user logs in to when the user logs out ?
Thanks in advance.
Gony

Posting it in [General Forum|http://forums.oracle.com/forums/forum.jspa?forumID=61] is more appropriate.
SS

Using EclipseLink or JPA with Oracle Coherence as shared cache

Hi,
I expect to use EclipseLink with Oracle Coherence as shared cache, mainly with/for Entity Caching.
* JPA)
For JPA queries, is the JPA semantics fully preserved when using Oracle Coherence ?
* Non-JPA)
Are the non-JPA API taking also advantage from Oracle Coherence ?
For these non-JPA queries, is the semantics fully preserved when using Oracle Coherence ?
Regards,
Dominique
PS: I hope this is the right forum to ask my questions.
Otherwise, could you tell me what is the right forum ?
Thanks.

Yes, JPA semantics are fully preserved when using TopLink-Grid to cache entities within Coherence.
Yes, the native EclipseLink APIs can also take advantage of TopLink-Grid and Coherence.
I am not sure what you mean by "For these non-JPA queries, is the semantics fully preserved when using Oracle Coherence ?" Perhaps you can provide an example of what you are looking for?
--Gordon

New Finder can't display Shared servers

When I installed Leopard using upgrade option, Finder started displaying shared servers where devices and places are usually displayed. Since I live in a student accommodation I quite liked the idea of being able to browse through other people's shared music and photos, but after i did a clean install my finder refuses to display shared computers even though i ticked them in the preferences. Any ideas on how to fix it???

Try Trashing the sidebar preference file; com.apple.sidebarlists.plist.
Located in ~user/Library/Preferences. Restart. Reset your preferences.

HELP! --with-pdo-oci=D:\php-sdk\oracle\instantclient10\sdk,shared

I have oracle instant client installed on C:\oracle\instantclient_11_2 and the environment variable for path set to C:\oracle\instantclient_11_2 on my windows VPS server. When I install PHP version 5.3.6 with the OCI8 extension it installs correctly. I run a php script with phpinfo(); and I see...
"--with-pdo-oci=D:\php-sdk\oracle\instantclient10\sdk,shared" "--with-oci8=D:\php-sdk\oracle\instantclient10\sdk,shared" "--with-oci8-11g=D:\php-sdk\oracle\instantclient11\sdk,shared"
But no OCI8 extension info is listed. So that tells me it's not installed and I can't do any oci functions.
I don't have a D:\php-sdk\oracle\instantclient10\sdk directory on that server and I have no idea on how to change the default compiled directory. If I run the php.exe I get an error saying that it can't locate the oci.dll...
How do I get this instant client path fixed?
I am at the end of my rope so who ever answers this post. THANK YOU!!!

This is a dup of this :
HELP! "--with-oci8=D:\php-sdk\oracle\instantclient11\sdk,shared"

CPU for Dispatcher and Shared Servers

Hi,
Is there any way to get CPU usage for Dispatcher and Shared Servers from database dictionary?
Currently I am using ps -ef to get the cpu usage of dispatcher and shared server background processes which gives time in seconds.
I want to get cpu time in 1/100th of second of in milliseconds.
Any help would be highly appreciated.
Thanks,
Manoj

hello Amish,
my first idea is,
please rename the progid in
IPC_RFC_DISPATCHER
like the handbooks.
I find a line in debugging where this name is hardcore stored in a report.
I forget the name.
The tests in SM59 are dinky.
I have the problem that the tests are okay, but i haven't a connect to the IPC_RFC_SERVER_1.
Second both systems have to be unicod or non-unicode, pleas no
mixed system-landscapes.
Hope I can help you a little bit.
Thorsten

Question about shared servers/dispatchers

Hello,
Oracle database 11.2.0.1
If we have 2 instances running under a Oracle home, can you configure dispatchers on the same host/port in both instances? I tried to do this, but the only one came up. I'm guessing because the port is in use? If I configure different ports for the dispatchers in the instances, both handlers start.
Thanks for the help!

As far as I know dispatchers can only work for one database instance (in single instance configuration). It makes no sense to try to share dispatchers among different database instances that manage different databases.

Oracle repositories for two servers-Production and Development

Hi,
We have two new servers- One production and other Development. We need a place to maintain an Essbase shared services repository in data center for these two servers.
My question is can we have both Oracle repositories in the same environment? If yes do we need to name them differently...I don't have much insight on the same. Please help me out!
Thanks in advance...

Thanks a lot John for this info.
Does this mean we can have oracle instances available for DEV and PROD on same machine, the only thing that will be differ is their Schema?
If we are having the same oracle instances in the same machine then we can oracle repositories set for both dev and prod in the same Oracle instance.
If we are having oracle instances in different machine then we can have oracle repositories setted up in respective oracle instance.
Please let me know if i have understood your answer completely?

Solaris 10, Oracle 10g, and Shared Memory

Hello everyone,
We've been working on migrating to Solaris 10 on all of our database servers (I'm a UNIX admin, not a DBA, so please be gentle) and we've encountered an odd issue.
Server A:
Sun V890
(8) 1.5Ghz CPUs
32GB of RAM
Server A was installed with Solaris 10 and the Oracle data and application files were moved from the old server (the storage hardware was moved between servers). Everything is running perfectly, and we're using the resource manager to control the memory settings (not /etc/system)
The DBAs then increase the SGA of one of the DBs on the system from 1.5GB to 5GB and it fails to start (ORA-27102). According to the information I have, the maximum shared memory on this system should be 1/4 of RAM (8 GB, actually works out to 7.84 GB according to prctl). I verified the other shared memory/semaphore settings are where they should be, but the DB would not start with a 5 GB SGA. I then decided to just throw a larger max shared memory segment at it, so I used the projmod to increase project.max-shm-memory to 16GB for the project Oracle runs under. The DB now starts just fine. I cut it back down to 10GB for project.max-shm-memory and the DB starts ok. I ran out of downtime window, so I couldn't continue refining the settings.
Running 'ipcs -b' and totalling up the individual segments showed we were using around 5GB on the test DB (assuming my addition is correct).
So, the question:
Is there a way to correlate the SGA of the DB(s) into what I need the project.max-shm-memory to? I would think 7.84GB would be enough to handle a DB with 5GB SGA, but it doesn't appear to be. We have some 'important' servers getting upgraded soon and I'd like to be able to refine these numbers / settings before I get to them.
Thanks for your time,
Steven

To me, setting a massive shared memory segment just seems to be inefficient. I understand that Oracle is only going to take up as much memory (in general) as the SGA. And I've been searching for any record of really large shared memory segments causing issues but haven't found much (I'm going to contact Sun to get their comments).
The issue I am having is that it doesn't make sense that the DB with a 5GB SGA is unable to startup when there is an 8GB max shared memory segment, but a 10GB (and above) seems to work. Does it really need double the size of the SGA when starting up, but 'ipcs' shows it's only using the SGA amount of shared memory? I have plans to cut it down to 4GB and test again, as that is Oracle's recommendation. I also plan to run the DB startup through truss to get a better handle on what it's trying to do. And, if it comes down to it, I'll just set a really big max shared memory segment, I just don't want it to come back and cause an issue down the road.
The current guidance on Metalink still seems to be suggesting a 4GB shared memory segment (I did not get a chance to test this yet with the DB we're having issues with).
I can't comment on how the DBA specifically increased the SGA as I don't know what method they use.

Is it possible to install Oracle RAC without shared storage

Dear All,
I would like to seek for your advice.
I got two different servers. We call it node 1 and node 2. And two different instances name.
Node 1 -> instance name as "ORCL1"
Node 2 -> instance name as "ORCL2"
For the system we need Oracle RAC active-active cluster mode. Our objective is to have 2 replicated databases, in other words we need 2 instances of the same database automatically replicated for 100% up time to the Application server. We have 2 separate database machines and 2 application server machines. We need our application server to connect to any of the databases at any point of time and be having a consistent data on both database machines. We only need the database to be in a cluster mode, we won't need the OS to be in a cluster. There is no shared storage in this case.
Can this be done? Please advice.

you should review RAC concepts, and the meaning of instance and database
For the system we need Oracle RAC active-active cluster mode.RAC = single database with multiple instances all accessing the same shared storage, no replication involved
Our objective is to have 2 replicated databases, in other words we need 2 instances of the same database automatically replicated for 100% up time to the Application server.what you describe here is = multiple databases with multiple instances, replicated between each other
We have 2 separate database machines and 2 application server machines. We need our application server to connect to any of the databases at any point of time and be having a consistent data on both database machines. We only need the database to be in a cluster mode, we won't need the OS to be in a cluster. There is no shared storage in this case.no shared storage = no RAC
you will have two seperate databases synchronizing continuously
you can use for example Streams / Advanced Replication (with multi-master configuration)
if you dont insist on an active-active configuration, you can also use Data Guard for building a standby database

Oracle not Available, Shared Memory realm doesn't exist

Hi,
I have problem during XE installation on Windows 2003 R2 SP 2 Enterprise edition. I have uninstall the oracle xe and the result still the same. Finally I uninstall the windows and start all over again, surprisingly the result still the same. FYI, we normally has no issue during installation because this is part of our system we sell to our customer which require oracle xe. This is the first time we have seen this issue.
ORA-01034 : Oracle Not available
ORA-27101 : Shared memory realm doesn't exist.
Oracle XE and listener services is started in the windows services.
if we try to do startup the following message occured.
SQL> connect /as sysdba
Connected to an idle instance.
SQL> startup
ORA-44412: XE edition memory parameter invalid or not specified
SQL>
I can send you the oracle_xe log, init ora, and OpsBuildAll.log to create the database.
When we compare with the working installation, we saw that the size of oraclexe folder is less, it's just 233MB while the working one is over 1GB. After investigation, found out that the .dbf files is not avaiable in the oradata folder, i have tried to copy those files from the working one but the problem stay the same, probably there are a lot of files more missing.
Appreciate your help on this.
Thanks,
Agus

Hi,
Please find the log below
SQL> startup nomount pfile="C:\oraclexe\app\oracle\product\10.2.0\server\config\scripts\init.ora";
ORA-44412: XE edition memory parameter invalid or not specified
SQL> @C:\oraclexe\app\oracle\product\10.2.0\server\config\scripts\rmanRestoreDatafiles.sql;
SQL> set echo off;
select TO_CHAR(systimestamp,'YYYYMMDD HH:MI:SS') from dual
ERROR at line 1:
ORA-01034: ORACLE not available
declare
ERROR at line 1:
ORA-01034: ORACLE not available
select TO_CHAR(systimestamp,'YYYYMMDD HH:MI:SS') from dual
ERROR at line 1:
ORA-01034: ORACLE not available
Connected to an idle instance.
SQL> spool C:\oraclexe\app\oracle\product\10.2.0\server\config\log\cloneDBCreation.log
I have css log as well if you are interesting to see.
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Tue Mar 20 14:13:29 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5308M/6133M, Ph+PgF:7152M/8000M, VA:1933M/2047M
Tue Mar 20 14:13:29 2012
Starting ORACLE instance (normal)
Tue Mar 20 14:13:30 2012
Starting ORACLE instance (normal)
Tue Mar 20 14:13:31 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Tue Mar 20 19:43:31 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5351M/6133M, Ph+PgF:7150M/8000M, VA:1932M/2047M
Tue Mar 20 19:43:31 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Tue Mar 20 19:55:39 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5254M/6133M, Ph+PgF:7052M/8000M, VA:1932M/2047M
Tue Mar 20 19:55:39 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Wed Mar 21 05:23:41 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5259M/6133M, Ph+PgF:6894M/8000M, VA:1932M/2047M
Wed Mar 21 05:23:41 2012
Starting ORACLE instance (normal)
Wed Mar 21 05:29:12 2012
Starting ORACLE instance (normal)
Wed Mar 21 05:31:42 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Wed Mar 21 05:50:45 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5143M/6133M, Ph+PgF:6768M/8000M, VA:1932M/2047M
Wed Mar 21 05:50:45 2012
Starting ORACLE instance (normal)
Wed Mar 21 06:02:38 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Wed Mar 21 06:04:03 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5205M/6133M, Ph+PgF:6866M/8000M, VA:1944M/2047M
Wed Mar 21 06:04:03 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Wed Mar 21 06:06:00 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5195M/6133M, Ph+PgF:6837M/8000M, VA:1944M/2047M
Wed Mar 21 06:06:00 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Wed Mar 21 06:06:11 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5195M/6133M, Ph+PgF:6836M/8000M, VA:1944M/2047M
Wed Mar 21 06:06:11 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Wed Mar 21 06:06:40 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5191M/6133M, Ph+PgF:6832M/8000M, VA:1944M/2047M
Wed Mar 21 06:06:40 2012
Starting ORACLE instance (normal)
Dump file c:\oraclexe\app\oracle\admin\xe\bdump\alert_xe.log
Wed Mar 21 06:07:18 2012
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Windows NT Version V5.2 Service Pack 2
CPU : 24 - type 586, 2 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:5191M/6133M, Ph+PgF:6831M/8000M, VA:1932M/2047M
Wed Mar 21 06:07:18 2012
Starting ORACLE instance (normal)
Wed Mar 21 06:07:38 2012
Shutting down instance (abort)
Wed Mar 21 06:07:51 2012
Starting ORACLE instance (normal)
Wed Mar 21 06:13:31 2012
Starting ORACLE instance (normal)
I have finished installing the XE on windows but result is the same, dbf file is not created on oradata folder.
Thanks,
Agus

Default username and password Oracle Hyperion workspace/shared services

Hi Friends,
I had installed Install Oracle Hyperion Planning, Fusion Edition Release 11.1.1.3.0 (foundation services and planning)
but i am unable to login to workspace,shared services
what is the default username and password for these.Please let me know?
Regards,
DB

Hi,
Default Admin user is: admin and default PW: password.
If you have not yet changed.
Thanks
Focusthread Hyperion Trainer
[http://focusthread.com/training]

Oracle listeners/dispatchers/shared servers

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