Maximum number of database instance on Exadata V2

Does any body know maximum of database instance can starting on Exadata V2, haft rack configuration. I can start only 13 instance but when start instance 14 it failed. I had try to increased number of semaphore but still not work.

I would expect that the maximum number of instances would be covered by sanity rather than something Oracle has configured.
Given that you've not posted the actual error message my recommendation would be that you either provide us with a lot more
information or that you open an SR with MOS.
Please also explain how you came to the presumption that the issue was semaphores.

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Maximum number of VPLS instances on ME3600X box

Hi,
Does anyone know what is the current maximum number of VPLS instances on ME3600X (Advanced Metro IP Access license)? I've found on one of the old presentations that this was only 26. And why is this limitation present?
Best regards,
Krzysztof

Hi Ricardo,
as for every platform, in the official limitations and restrictions there is a margin of prudence in what the platform can support. Let's say you can configure 40 VPLS instances (never tried) on your 3600X , and you do it with no apparent issue, this implementation would simply fall off the tests which Cisco did on that particular platform. Hence, any bad subsequent behaviour would not be "Cisco fault" and i actually see no reason for doing that.
HTH
Alessio

Maximum number of instances

Hello everyone,
I just want to ask if there's a limit/maximum number of workflow instances for
a specific workflow label/identifier? From what I know, the label is just a label
for the user to identify the instances but it's not really a unique id for an
instance. So, many instances can have the same label but they are actually unique
from one another.
I'm asking this question because I'm having a bit of a problem with my workflow.
I'm using a particular label many times and WLPI creates many instances. But after
some time, it seems to stop creating new instances for the same label. Has this
happened to anyone else before? If so, how did u resolve it? If not, do you have
any suggestions how to go about this?
Thank you very much!

Hi shannon,
I'm using WLI 7.0 sp1.
"shannon" <[email protected]> wrote:
>
Hi, what's the version of WLI are you use ? 7.0?
"Jo-Ann de Leon" <[email protected]> wrote:
Hello everyone,
I just want to ask if there's a limit/maximum number of workflow instances
for
a specific workflow label/identifier? From what I know, the label is
just a label
for the user to identify the instances but it's not really a uniqueid
for an
instance. So, many instances can have the same label but they are actually
unique
from one another.
I'm asking this question because I'm having a bit of a problem withmy
workflow.
I'm using a particular label many times and WLPI creates many instances.
But after
some time, it seems to stop creating new instances for the same label.
Has this
happened to anyone else before? If so, how did u resolve it? If not,
do you have
any suggestions how to go about this?
Thank you very much!

Maximum Number of Mirrored Databases Decreases as Number of Available Cores Increases?

Hi,
I wonder if you can help me. We're planning a large in-house mirroring deployment and are concerned we may (at some point) run into the limits described in the following KB article:
http://support.microsoft.com/kb/2001270/en-gb.
Based on the formulas contained within the above article, I knocked up a quick spreadsheet to see how increasing the number of cores might allow us to increase the number of mirrored databases. However, to my surprise, my calculations imply that as you increase
the number of cores, the number of databases you can potentially mirror decreases?
No. of Logical Cores
Max Worker Threads
Threads Required per Mirrored Database
Max. No. of Databases that can be Mirrored
4
512
3
170.6666667
8
576
4
144
12
640
5
128
16
704
6
117.3333333
20
768
7
109.7142857
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832
8
104
28
896
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99.55555556
32
960
10
96
64
1472
18
81.77777778
Am I missing something here? Have a miscalculated somewhere? This seems counterintuitive.
Regards
Andy

Hi rushandy,
As the KB post, we need to calculate the max worker threads, which is default no. of worker thread SQL Server will spawn. about database mirroring requirements for worker threads, we need to calculate the number of threads required per mirrored database.
At end,
maximum number of databases that can be mirrored = the max worker threads/ the number of threads required per mirrored database.
As your post, for 64 bit architectures, if the number of logical CPU cores is 16 on the mirror server, after calculating , maximum number of databases that can be mirrored is 117. However, in actual scenario, the mirroring databases is less than 117, or
else, it will cause some errors, such as error 17884 and so on.
Usually, not all worker threads would be available to perform mirroring activities as some threads are assigned to core database activity on the server. For more information, see：http://sqlknowledgeshare.blogspot.com/2012/02/do-you-know-maximum-number-of-databases.html
Regards,
Sofiya Li
Sofiya Li
TechNet Community Support

Maximum number of connections that database can make

Dear All,
I have a problem regarding maximum number of database connections that can be handled .
Theoretically i am aware that the number of sessions we set in init ora settings tells me the maximum
connections that can be opened.but this number will be also be dependent on the capability of the OS to handle the sessions.
is there any way i can analyse the number of possible connections possible if I have the OS memory and CPU parameters with me
Regards

http://books.google.com/books?id=TmPoYfpeJAUC&pg=PA129&lpg=PA129&dq=.5mb+for+each+db+session+oracle&source=web&ots=RzRe2s2AYy&sig=zmO-RBoCEuWQzaZhOIN122Serzk&hl=en&sa=X&oi=book_result&resnum=5&ct=result#PPA122,M1.
This is from expert oracle database architecture by tom kytes and I personally ran some queries to confirm that.
Edited by: OrionNet on Nov 30, 2008 11:51 PM

Maximum number of dimensions & databases allowed & recommended in Essbase?

Hi,
can anyone one give input on what are Oracle recommendations on maximum number dimensions & databases allowed & recommended in Essbase?

Hi John,
Thanks for your post, I also have the same query related to Dimensions and Databases of (ASO,BSO) application, as i donot found anything like this in
http://docs.oracle.com/cd/E17236_01/epm.1112/esb_dbag/limits.htmlwhat is the maximum number of dimension & databases we can use in essbase application. like we have limitation of dimensions and database in Planning application
Thanks,
Avneet

Maximum No. of Databases

What is the maximum no. of Database instances that can be created & mounted[opened] at the same time under Windows-NT OS
& under Oracle 8i.

As fas as I know there is no limit for the number of database. However the problem which you may get is the your NT server may become overloaded if you use it with to many databases.

SQ01 restricting the number of database accesses

Hi,
I created a report using SAP Query (SQ01). When I run the query a dialog box appears asking the maximum number of database accesses.
The value entered here directly affects the result of the report. The user has to change the value manually in order to see the complete set of results, set it 999999 for example.
I want to get rid of that dialog box. Is it possible?
If not can I change the default value '100' to anything I want?
Thanks...

That is true, it is a bit loaded report. It includes additional fields, selections and another select statement for each record. I tried to keep it as simple as possible but that is the only way that I could think of.
The joins are:
VBAK - VBAP
VBAP - VBUP
VBAP - MARD
VBAP - MARA
The report basicly brings the stock amounts of open sales order items. In addition the total consignment level for that item is also requested, so I wrote a select statement in record processing which finds the total consignment level from the MKOL table for that item. I could not simply add MKOL to my join list because it than divides each item to the number of vendors that exists in the MKOL table. The user is not interested in the amount for each vendor, only the total amount.
The performance is not that bad, but as I said before the result of the report is different for different limits of database accesses.
Is there a way to omit the limit?

RE: Number if databases in Directory Server 5.2

Hi,
Im looking to find out what the maximum number of databases should be in Directory Server 5.2.
I know that previously Sun had recommended that a certain number not be exceeded, but Im now looking for figures.
If there is any other information available, please post it.
thanks
ndrb

Just for the fun of testing, we did create more than 50 databases... The server works ok, but some operations start to be less responsive...
I would not recommend to use this in real deployments if there is also a lot of entries in the databases.
Regards
Ludovic.

Maximum number of triggers.

Hi
Can any one tell me the maximum number of database triggers and schema triggers can be created with in a database.
Thanks,
James.

There is no limit. At least no practical limit.
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Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

What is the maximum number of characters in an Oracle 10G Instance Name

All,
Can I know what is the maximum number of characters in an oracle 10g instance name under AIX? Is it 7 characters or 8 characters?
regards
Santhosh

One should really make the difference between db_name and instance_name: if instance_name default value is db_name it can be different
(even on a non RAC database).
For example with Oracle 10.2.0.4 you can create a database named DB78 with instance_name=DB12345678:
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Linux lx01.localdomain 2.6.18-92.el5 #1 SMP Fri May 23 22:17:30 EDT 2008 i686 i686 i386 GNU/Linux
$ ps -fu oracle | grep smon
oracle    6353     1 0 20:30 ?        00:00:01 ora_smon_DB12345678
oracle    6412 5596 0 20:37 pts/1    00:00:00 grep smon
$ export ORACLE_SID=DB12345678
$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.4.0 - Production on Wed Sep 8 20:34:26 2010
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> show parameter name
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db_file_name_convert                 string
db_name                              string      DB78
db_unique_name                       string      DB78
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instance_name                        string      DB12345678
lock_name_space                      string
log_file_name_convert                string
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Problem with reached maximum number of connections to database

Dear Experts,
Our Production system was not responding properly last week.
The below was the reply from the Basis team.
"It seems that we have again problem with reached maximum number of connections to database. We have extended this number to 100 this year and now it seems that it’s not enough again. It seems that something is running on Production, which takes over too many connections."
They have increased the number to 200 as a work around.
Do we have any means to find out, which component or application is causing the issue.
Please advise me if any better way is available to correct the issue.
Please see the below trace.
From default trace:
======
Caused by: com.sap.engine.services.dbpool.exceptions.BaseSQLException: ResourceException occurred in method ConnectionFactoryImpl.getConnection(): javax.resource.R
esourceException: (Failed in component: dbpool, BC-JAS-TRH) Cannot create connection. Possible reasons: 1)Maximum allowed connections to DB or EIS is reached. You
can apply CSN Note 719778 in order to check and resolve connection leaks. 2) Configuration to DB/EIS is wrong or DB/EIS is temporary unreachable. 3) Connections ar
e not enough for current load.
        at com.sap.engine.services.dbpool.cci.ConnectionFactoryImpl.getConnection(ConnectionFactoryImpl.java:60)
        at com.sap.security.core.persistence.datasource.imp.J2EEConnectionPool.getConnection(J2EEConnectionPool.java:205)
        ... 61 more
Caused by: javax.resource.ResourceException: (Failed in component: dbpool, BC-JAS-TRH) Cannot create connection. Possible reasons: 1)Maximum allowed connections to
DB or EIS is reached. You can apply CSN Note 719778 in order to check and resolve connection leaks. 2) Configuration to DB/EIS is wrong or DB/EIS is temporary unr
eachable. 3) Connections are not enough for current load.
        at com.sap.engine.services.connector.jca.ConnectionHashSet.match(ConnectionHashSet.java:230)
        at com.sap.engine.services.connector.jca.ConnectionManagerImpl.allocateConnection(ConnectionManagerImpl.java:343)
        at com.sap.engine.services.connector.jca.ShareableConnectionManager.allocateConnection(ShareableConnectionManager.java:54)
        at com.sap.engine.services.dbpool.cci.ConnectionFactoryImpl.getConnection(ConnectionFactoryImpl.java:52)
        ... 62 more
Caused by: com.sap.engine.services.dbpool.exceptions.BaseResourceException: SQLException is thrown by the pooled connection: com.sap.sql.log.OpenSQLException: No c
onnection to data source SAPEPPDB available. All 100 pooled connections are in use and 70 connection requests are currently waiting. The connection pool size might
need to be adjusted.
        at com.sap.engine.services.dbpool.spi.ManagedConnectionFactoryImpl.createManagedConnection(ManagedConnectionFactoryImpl.java:192)
        at com.sap.engine.services.connector.jca.ConnectionHashSet.match(ConnectionHashSet.java:221)
        ... 65 more
Caused by: com.sap.sql.log.OpenSQLException: No connection to data source SAPEPPDB available. All 100 pooled connections are in use and 70 connection requests are
currently waiting. The connection pool size might need to be adjusted.
======
Thanks and Kind Regards,
Jelbin

Stop all instances(including DB) and start again, Hope it should work.
It may happened that jar has not been synchronized with the database and may be version mismatch with the java.
719778 - Data Source fails to return connection
1650472 - Transactions are interrupted due to database connection periodically failing to establish
1138877 - How to Deploy External Drivers JDBC/JMS Adapters
Change the connection pool so that it can connect to DB as per the note 719778
Regards
Vijay Kalluri

Maximum number of Oracle-10/11 instances on a Windows server?

Hi,
What is the maximum number of oracle 10/11 database instances that can be installed on a Windows-32 server.
Also what is advisable?
Assuming each database instance will have no more than 4 concurrent users with light usage.
Windows Server - 2008 4GB Ram Xeon or similar processor.
Many Thanks
Shahine
[email protected]

user6394502 wrote:
Hi,
What is the maximum number of oracle 10/11 database instances that can be installed on a Windows-32 server.
Also what is advisable?
You can have any number of instances installed on the server. 42 is a great number.
Just don't turn on more than one or two instances at a time.
Better might be to look at, and understand, 'schema' concept - it may be possible to use multiple schemas in one instance/database to accomplish the same thing as your multiple instance proposal.

Maximum number of user mailboxes supported by single Exchange Database in 2007 / 2010 & 2013 ?

What is the Maximum number of user mailboxes supported by single Exchange Database in 2007 / 2010 & 2013 ?
Aditya Mediratta

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a single database so you can utilize a ridiculous # of mailboxes in a DB if desired. IMO you are better off to keep the # of mailboxes to a reasonable level, i.e. no more than 250-500 mailboxes per DB
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Maximum number of service in a database?

Somebody can tell me if there is a maximum number of service I can use in a database? Those services are create with dbms_service or "srvctl add service" or dbca. Those services are set in the database parameter SERVICE_NAME automatically by the Clusterware or manually if it is not a cluster database.
Thank,
GG

I would tend to be suspicious just because 50 services is quite a lot. If you really have 50 distinct applications and you want to manage 50 different services, 50 different TNS aliases, etc. you certainly can. But most organizations aren't going to see a lot of benefit from having that many services and may end up spending a lot of time micro-managing things the system unnecessarily.
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Justin

Maximum number of database instance on Exadata V2

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