Maximum number of cores

Hi,
I am using solr4.0, i have created 10 cores in solr. I want to know how many maximum number of cores can be created in solr.

As seens from the link already quoted, tthe number of allocated threads is dependent on the number of avaialble CPU cores. The parallel FOR loop can be set for up to 256 parallel instances with the following ini setting:
ParallelLoop.MaxNumLoopInstances=256 (see here)
If programmed correctly, LabVIEW can use all cores you throw at it. Of course if the code forces sequential execution due to poor architecture, extensive critical sections, and artificial data dependencies, the hands of the LabVIEW compier are tied.
I have a Dual Xeon with 32 virtual cores (=16 hyperthreaded cores) and I can keep them all busy, gettting a 17x speedup over the single core performance (details). The code is highly optimized for parallel execution.
If you need to do highly parallel matrix operations, you might also want to look into the MASM toolkit.
LabVIEW Champion . Do more with less code and in less time .

Similar Messages

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
24
832
8
104
28
896
9
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

Illustrator won't run: "unable to set maximum number of files to be opened"

I have an intel macbook pro (core duo with 2GB ram) and a copy of purchased adobe creative suite 2. Other applications in the suite like photoshop, acrobat, etc can run on my mac without any problem. But when I try to run illustrator, it just shows an error message "Unable to set maximum number of files to be opened" and quits. I also installed a trial version of illustrator cs3 and got the same problem. Can anyone help? Thanks.
CC

Hi, I realize this is an old thread but it was unanswered and the issue has come up again in a newer thread:
http://forums.adobe.com/message/2534652
If the original poster sees this, can you reply tin the new thread and let us know if you were ever to solve this problem?
Thanks!

Increasing maximum number of Logical Processors in a Processor Group greater than the default (64)

Can the maximum number of Logical Processors allowed in a Processor Group be increased by Bcdedit command or registry key to a number greater than the default (64) to allow non-group-aware applications to seamlessly scale via multithreading across more cores
MSDN documents methods to reduce the max number of LP's in a Processor Group to 1 or any power of 2 less than 64 in order to increase the number of Processor Groups. But there is no discussion of how to increase the maximum number of Logical Processors
allowed in a Processor Group to a number greater than the default (64), e.g. to 128 or 256.
Since a non-group-aware application/process can only run on 1 Processor Group, increasing this limit is needed to allow non-group-aware multithreaded applications to scale seamlessly for parallel computation across more than 64 cores simultaneously on systems
with more than 64 cores (for example, a quad-socket Intel Xeon system with 24 cores per socket, including true and hyper cores). If that limit can be set via registry key or command line, or if there is another way to force all the cores on
all 4 sockets (4 NUMA nodes in this case) to join in 1 Processor Group, then non-group-aware applications will not need to be rewritten using group-aware thread-affinity APIs.

Hi John,
Are you trying to specify a static NUMA-node-to-group assignment, rather than letting Windows dynamically assign NUMA nodes to groups at boot time? If yes, You can refer the
following related KB:
How to manually configure K-Group assignment on multiprocessor machines
http://support.microsoft.com/kb/2506384
Systems with fewer than 64 logical processors always have a single group, Group 0. On systems with 64 or fewer processors, existing applications will operate correctly without
modification. Applications that do not call any functions that use processor affinity masks or processor numbers will operate correctly on all systems, regardless of the number of processors. To operate correctly on systems with more than 64 logical processors,
the following kinds of applications might require modification:
•Applications that manage, maintain, or display per-processor information for the entire system must be modified to support more than 64 logical processors. An example of
such an application is Windows Task Manager, which displays the workload of each processor in the system.
•Applications for which performance is critical and that can scale efficiently beyond 64 logical processors must be modified to run on such systems. For example, database
applications might benefit from modifications.
•If an application uses a DLL that has per-processor data structures, and the DLL has not been modified to support more than 64 logical processors, all threads in the application
that call functions exported by the DLL must be assigned to the same group.
By design, a non-NUMA computer is considered to have one NUMA node. Because NUMA nodes cannot span groups, the system creates a node for each group after you restart the computer.
The related KB:
Processor Groups
http://msdn.microsoft.com/en-us/library/windows/desktop/dd405503(v=vs.85).aspx
More information:
Uneven Windows Processor Groups
http://blogs.msdn.com/b/saponsqlserver/archive/2011/10/08/uneven-windows-processor-groups.aspx
Boot Parameters to Test Drivers for Multiple Processor Group Support
http://msdn.microsoft.com/en-us/library/windows/hardware/ff542298(v=vs.85).aspx
I’m glad to be of help to you!
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

Maximum number of items in an iTunes U feed?

What is the maximum number of items I can have in an iTunes U feed?
I'm sure I was told on the iTunes U course that the maximum number of items was 300 but in order to get items featured on the homepage I should try to limit it to 50.
Can anyone confirm this?
I've split our public lecture podcasts into separate feeds for each year but we're nearing 300 per year and will soon exceed that number. The only option would be to split it again by term but we can't do that without significant development work on our media CMS.

Please ignore these questions - these issues are covered in the public site manager video. http://deimos3.apple.com/WebObjects/Core.woa/Browse/new.duke.edu.1302914143.0352 7899686.4285944238?i=2057081390
They make it quite clear that iTunes U feeds should have a maximum of 300 items. I'm still not sure what would happen if you had a feed with more than 300 items, not that it really matters though. We've made changes to our media CMS so we can now create individual feeds for each our courses split by date e.g. 2010 Spring Term, 2010 Summer Term etc. This allows us to keep the number of items in our feeds well below 300.
They also say that you should avoid having items in more than one feed as this will have a impact on your iTunes U download stats i.e. the iTunes U download count for items listed in one more than one feed will be diluted. Because of this we've dropped the idea of a 'latest 50' feed for iTunes U and wherever possible we will avoid listing items in more than one feed.
I'm still not sure why an item in a feed with less than 50 items is more likely to get featured on the iTunes U homepage. Would be great if someone could confirm if this is true and if so why that is the case.

Maximum number of dialog work process

Hello gurus,
Could you please let me know what is the maximum number of dialog work process that you can configure in an Netweaver system with ABAP 7.0 before considering to install a new application server to distribute the load?
Thaks for your help,
Best regards

> Just one question, according to the following statement, can I think that I should estimate a usage of 1/4 CPU core by every dialog WP?
No, this was just an example to make clear what I mean.
> Do you know any SAP note that could help me to estimate the number of WP according to the load of the system?
There is no such note and there can't be.
You could have a system with e. g. 100 users where 10 of them do really produce load, the other 90 may just run a few transactions or do just nothing - so 50 WPs is too much. You could also have a system with 20 users where ALL are entering data all data and doing reporting and stuff so 20 WPs is too less. There may also be processes like ATP that use one background worprocess and spawn a number of dialog WPs you configure in the application. If you configure too few of them, the ATP run will run very log, if you configure too much, the system will be overloaded and slowing down. I can imagine dozens of other examples what may cause load or not.
Because of that it's not possible to give a formular how many WPs to be configured for how many users.
This is a tuning thing and needs to be estimated in the first weeks after a GoLive; watch the system, reconfigure, watch. Check ST03N and SM50/SM66 or book an early watch after some time, they have rough estimates and give usually good advises. Out of theory it's almost impossible to predict something.
Markus

Maximum number of processor sockets in Windows Server 2012 Datacenter and Standard

I have found no documentation on the technical number of supported processor sockets supported by Windows Server 2012 for the Standard and Datacenter editions.
Some donation websites like Techsoup claim that Datacenter supports 64 physical processors and Standard 8, but I can find no authoritative confirmation of this and those look like extrapolation from Windows Server 2008 R2.
So what are the maximum supported # of processor sockets, assuming you have licenses for all of them, for Datacenter and Standard? Do they differ by edition?
In addition, is it true that the total # of supported logical processors in a single system is 640 w/o Hyper-V? It was originally reported to be that, but since Hyper-V's number doubled from 160 in the Beta to 320 in the RC and RTM, did this double too?

You might find some of the information you are looking for here -
http://download.microsoft.com/download/2/C/A/2CA38362-37ED-4112-86A8-FDF14D5D4C9B/WS%202012%20Feature%20Comparison_Hyper-V.pdf. I know there is one change that is not reflected there. Recently the maximum number of virtual machines supported
in a cluster was raised to 8,000 instead of the 4,000 reflected in this document.
The maximum number of sockets for Standard would be two because that is the maximum number that the license supports. Standard has never supported 8. Prior to 2012, it supported 4, and then the licensing changed with 2012 so that Standard would
be sold per processor (socket) with a maximum of two. Technically, the binaries are the same for Standard and Datacenter, so you can most likely get it to run with more somehow, but it is not a supported configuration.
The maximum number of sockets for Datacenter would be 64 - that has not changed from 2008. I make this statement based on the fact that Datacenter supports a maximum of 64 virtual CPUs when run as a virtual machine. Virtual machines don't have
the distinction of socket versus hyper-thread versus core. They see what is presented to them as a processor. But, I doubt very much that you will find any off-the-shelf 64 socket systems; most vendors are relying on the core densities instead
of socket density in order to deliver the horsepower. The above referenced document still shows 320 as the maximum number of logical processors, with or without Hyper-V.
tim

Maximum number of still images in a sequence exceeded

Model Name: iMac
Processor: Intel Core 2 Duo
Processors: 2.8 Ghz
Memory: 4GB
Bus Speed: 800MHz
FCP 7.0.3
So what's the maximum number of still images that are allowed in a single sequence in FCP 7?
Does it vary from FCP 6, 5, Express etc.?

http://www.flickr.com/photos/48395063@N07/5328011119/
http://www.flickr.com/photos/48395063@N07/5328011119/sizes/l/in/photostream/
You have to zoom in to read the yellow message box that appears when the mouse is loitering over the orange unlimited-time bar above the sequence.
For your pleasure I have typed it out:
"Video: Unlimited
Audio: Media File
_*The maximum number of real-time still images has been exceeded in this sequence.*_
A motion of composting effect can not be played in real time.
Real time playback is not supported for the clip on track 1.
The nested sequence on track 2 does not match this sequence settings.
The nested sequence on track 11 does not match this sequence settings."
Basically we're doing the "Artists Showcase" and artists send in photos and not all of them will be able to match the sequence settings since we take what we can get.
Besides that the estimated number of still images is 480.

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 fabric logins

Hi there
I need to provide documented references for a large SAN, and have a few queries.
I have the show tech-supports for an edge-core-edge SAN consisting of 2 redundant fabrics.
There are 4 host edges, 1 core, 4 storage edges per fabric. All are MDS 9500 series directors, running SAN-OS 3.2.2a.
In the Large SAN Design Best Practices whitepaper
(http://www.cisco.com/en/US/prod/collateral/ps4159/ps6409/ps5990/white_paper_C11-515630.pdf)
there is a reference to the maximum number of fabric logins.
"The Cisco MDS Family supports up to 10,000 fabric logins in a physical fabric, regardless of the number of VSANs in the network."
1) Is this specifically refering to the number of f_ports?
2) If not, what is the 10,000 referring to?
In the Cisco MDS NX-OS Release 5.0 Configuration Limits
(http://www.cisco.com/en/US/docs/switches/datacenter/mds9000/sw/5_0/configuration/guides/limits/limits_50.html)
there is a mention of 10000 FCNS entries per fabric.
This is the only reference I can find that correlates the two limits.
The Configuration Limits for Cisco MDS SAN-OS Release 3.x
(http://www.cisco.com/en/US/products/ps5989/prod_troubleshooting_guide_chapter09186a0080679fd4.html)
makes no mention of FCNS or fabric login limits.
3) Is the reference to 10000 FCNS entries (in the NX-OS 5 limits) also the number of fabric logins?
In the show tech-support, there is a command
`show tech-support fcns`
`show fcns database vsan 1-4093`
VSAN 431:
FCID        TYPE PWWN                    (VENDOR)        FC4-TYPE:FEATURE
0x050002    N     50:06:04:8c:52:a6:c0:69 (EMC)           scsi-fcp 253
0x050003    N     50:06:04:84:52:a6:c0:49 (EMC)           scsi-fcp:both 253
0x050004    N     50:06:04:8c:52:a6:c0:49 (EMC)           scsi-fcp 25
<.. output abbreviated for brevity>>
Total number of entries = 1066
4) Does this mean that there are 1066 fabric logins?
When I look further in to it, and see the command
`show fcns database detail vsan 1-4093`
VSAN:431   FCID:0x0500b1
port-wwn (vendor)           :10:00:00:00:c9:72:4d:9c (Emulex)
                             [nus157_hba0_0]
node-wwn                    :20:00:00:00:c9:72:4d:9c
class                       :3
node-ip-addr                :0.0.0.0
ipa                         :ff ff ff ff ff ff ff ff
fc4-types:fc4_features      :ipfc scsi-fcp
symbolic-port-name          :
symbolic-node-name          :Emulex LPe11002-S FV2.82a4 DV2.50o
port-type                   :N
port-ip-addr                :0.0.0.0
fabric-port-wwn             :21:07:00:0d:ec:3a:44:c0
hard-addr                   :0x000000
permanent-port-wwn (vendor) :10:00:00:00:c9:72:4d:9c (Emulex)
It shows that most of the entries have the port-type: N.
5) Does this mean they are N_ports, not F_ports?
I would really appreaciate answers to these questions.

John,
Cisco NXOS Configuration Limits (reference/background link)
1) Is this specifically refering to the number of f_ports?
   Answer: Yes, the 10k logins in the Design Guide Whitepaper refer to the number of Fabric logins, not the number of physical ports. This is because you could have a single F_Port that has multiple logins as part of it. For example, an Nexus 5000 in NPV mode could connect to a MDS 9513 via one F_port (NP_Port on the Nexus 5k), but have many Fabric Logins (technically, one FLOGI and multiple FDISC).
2) If not, what is the 10,000 referring to?
     Answer: Number of devices logged into the Fabric not the number of ports in the fabric.
3) Is the reference to 10000 FCNS entries (in the NX-OS 5 limits) also the number of fabric logins?
     Answer: Yes, since every device out there that FLOGIs into the fabric registers with the nameserver.
4) In the below output does this mean that there are 1066 fabric logins?
In the show tech-support, there is a command
`show tech-support fcns`
`show fcns database vsan 1-4093`
VSAN 431:
FCID        TYPE PWWN                    (VENDOR)        FC4-TYPE:FEATURE
0x050002    N     50:06:04:8c:52:a6:c0:69 (EMC)           scsi-fcp 253
0x050003    N     50:06:04:84:52:a6:c0:49 (EMC)           scsi-fcp:both 253
0x050004    N     50:06:04:8c:52:a6:c0:49 (EMC)           scsi-fcp 25
<.. output abbreviated for brevity>>
Total number of entries = 1066
Answer: Yes.
5) Does this mean they are N_ports, not F_ports?
When I look further in to it, and see the command
`show fcns database detail vsan 1-4093`
VSAN:431   FCID:0x0500b1
port-wwn (vendor)           :10:00:00:00:c9:72:4d:9c (Emulex)
                             [nus157_hba0_0]
node-wwn                    :20:00:00:00:c9:72:4d:9c
class                       :3
node-ip-addr                :0.0.0.0
ipa                         :ff ff ff ff ff ff ff ff
fc4-types:fc4_features      :ipfc scsi-fcp
symbolic-port-name          :
symbolic-node-name          :Emulex LPe11002-S FV2.82a4 DV2.50o
port-type                   :N
port-ip-addr                :0.0.0.0
fabric-port-wwn             :21:07:00:0d:ec:3a:44:c0
hard-addr                   :0x000000
permanent-port-wwn (vendor) :10:00:00:00:c9:72:4d:9c (Emulex)
It shows that most of the entries have the port-type: N.
Answer: An N_Port is an end device like a storage port or an HBA, which connects to an F_Port (Fabric Port) which is the corresponding port on the switch. This is why you see it as an port-type of N, rather than NL (Node Loop) F, E, or FL (Fabric Loop), as only N or NL can represent the end device itself and not the port on the switch.
Hope this helps,
Seth

ORA-00020: maximum number of processes 1000 exceeded

Hello,
Oracle 10.2.0.4.0
O/S: Windows Server 2003-64 bits
RAM: 32Gb
Instance: opext
show SGA
Total System Global Area 10284433408 bytes
Fixed Size 2180960 bytes
Variable Size 1574353056 bytes
Database Buffers 8690597888 bytes
Redo Buffers 17301504 bytes
Today at 8:01 am we've got this error:
ORA-00020: maximum number of processes 1000 exceeded
That incident was reported in a trace file (opext_ora_8240.trc):
Dump file c:\oracle\product\10.2.0\admin\opext\bdump\opext_ora_8240.trc
Tue Jul 31 08:01:03 2012
ORACLE V10.2.0.4.0 - 64bit Production vsnsta=0
vsnsql=14 vsnxtr=3
Oracle Database 10g Release 10.2.0.4.0 - 64bit Production
Windows NT Version V5.2 Service Pack 2
CPU : 8 - type 8664, 1 Physical Cores
Process Affinity : 0x0000000000000000
Memory (Avail/Total): Ph:18773M/32767M, Ph+PgF:66964M/80966M
Instance name: opext
Redo thread mounted by this instance: 1
Oracle process number: 0
Windows thread id: 8240, image: ORACLE.EXE
ORA-00020: maximum number of processes 1000 exceeded
Died during process startup with error 20 (seq=212441)
OPIRIP: Uncaught error 20. Error stack:
ORA-00020: maximum number of processes (1000) exceededThis was the first time in three years that happened an incident like this. Due my Windows server allows me to setup processes and sessions with a very high value, I did it when configuring this database for the first time.
select resource_name,initial_allocation, limit_value from V$RESOURCE_LIMIT;
RESOURCE_NAME     INITIAL_ALLOCATION     LIMIT_VALUE
processes     1000     1000
sessions     1105     1105
transactions     1215     UNLIMITEDI would like to know what application or process made that my database exceeds 1000 processes. I read that one possiblity is that there's a web app that open many connections to database and doesn't close them.
In my listener.log, I got this at 08:05 am:
31-JUL-2012 08:05:41 * service_update * opext * 0
31-JUL-2012 08:05:47 * (CONNECT_DATA=(SERVICE_NAME=opext)(CID=(PROGRAM=c:\windows\system32\inetsrv\w3wp.exe)(HOST=SRVXXX)(USER=NETWORK?SERVICE))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.1)(PORT=36578)) * establish * opext * 0
31-JUL-2012 08:05:47 * service_update * opext * 0
31-JUL-2012 08:05:47 * (CONNECT_DATA=(SERVICE_NAME=opext)(CID=(PROGRAM=c:\windows\system32\inetsrv\w3wp.exe)(HOST=SRVXXX)(USER=NETWORK?SERVICE))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.1)(PORT=36579)) * establish * opext * 0
31-JUL-2012 08:05:47 * (CONNECT_DATA=(SERVICE_NAME=opext)(CID=(PROGRAM=c:\windows\system32\inetsrv\w3wp.exe)(HOST=SRVXXX)(USER=NETWORK?SERVICE))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.1)(PORT=36580)) * establish * opext * 0
31-JUL-2012 08:05:47 * (CONNECT_DATA=(SERVICE_NAME=opext)(CID=(PROGRAM=c:\windows\system32\inetsrv\w3wp.exe)(HOST=SRVXXX)(USER=NETWORK?SERVICE))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.1)(PORT=36581)) * establish * opext * 0
31-JUL-2012 08:05:47 * (CONNECT_DATA=(SERVICE_NAME=opext)(CID=(PROGRAM=c:\windows\system32\inetsrv\w3wp.exe)(HOST=SRVXXX)(USER=NETWORK?SERVICE))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.1)(PORT=36582)) * establish * opext * 0
31-JUL-2012 08:05:47 * (CONNECT_DATA=(SERVICE_NAME=opext)(CID=(PROGRAM=c:\windows\system32\inetsrv\w3wp.exe)(HOST=SRVXXX)(USER=NETWORK?SERVICE))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.1)(PORT=36583)) * establish * opext * 0
31-JUL-2012 08:05:47 * (CONNECT_DATA=(SERVICE_NAME=opext)(CID=(PROGRAM=c:\windows\system32\inetsrv\w3wp.exe)(HOST=SRVXXX)(USER=NETWORK?SERVICE))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.1)(PORT=36584)) * establish * opext * 12518
TNS-12518: TNS:listener could not hand off client connection
TNS-12560: TNS:protocol adapter error
Host SRVXXX is a server where a web app is and 192.168.1.1 is our firewall. May I think that this server was the one that made so many connections?
I checked alert.log, trc file and listener.log. What else can I check to determine what was the cause of this incident?

user521219 wrote:
Host SRVXXX is a server where a web app is and 192.168.1.1 is our firewall. May I think that this server was the one that made so many connections?
I checked alert.log, trc file and listener.log. What else can I check to determine what was the cause of this incident?check IIS logs
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Maximum number of domains per physical server

I am curious as to whether or not there is a maximum number of domains per physical server. Is it just based on resources, i.e. memory, hdd space, etc. or does Oracle have it's own specific recommendations? I realize, as implied, that one could put a number of vm's on a server that would utilize the server ram up to an amount reserved for the OS.
Just wondering if there is a recommendation.
By the way, we are running WLS (10.0MP1) and OSB (3.0) on top of Win2K3.
Thanks for nay info,
Todd

Typically it depends on the resources.
If the WLS instances are heavily utilized, at some point having more JVM's than the number of cores impacts performance if the apps are CPU bound. Similar applies for apps that use a lot of memory or sessions. There is no blanket answer and there is no hard and fast limit.

Maximum number of simultaneous Template requests

I am running a CF-server (standard) on a
Intel(R) Xeon(R) CPU E5420 @ 2.50GHz, 8 cores
I have read somewhere on the net that you can set 8-10 maximum number of simultaneous template requests per core, which in my case
would be 64-80 simultaneous template requests.
Is that a correct assumption?
This does feel quite high considering the default value of the server is 10 simultaneous requests.
//Toby

It is the common rule of thumb, but that does not make it the correct or incorrect assumption.
What it does make is a common and usefull starting point, with the strong assumption that one will then load test ones system to make sure the setting accually works well with ones applications and hardware. And that one will then adjust accordingly based on the testing.

Maximum number of switches in a LAN

Hello
I have one question about the maximum number of switches (layer 2 only) that we could connect together in a LAN.
I think is 7.
In the case that we want to install more that 7 what are the STP parameters what we must change ?
thank you for your answers.

Hi Mauricio,
The figure that you are talking baout is the diameter of STP i.e 7. Thhis is the number of hops to which STP spans properly and does the STP calculations as expected. After 7 hops you might see unexpected results and it depends. There is no limit of the switches that you can put in you N/W it all dpends upon the N/W, Number of nodes i.e users and requrement. So in case if you are trunking switches to your Core/Distribution switches make sure that you should not cross the 7 hops STP diameter.
HTH,
-amit singh

Maximum number of partitions allowed per table.

Interesting findings with interval partitioning:
SQL> SELECT *
2    FROM v$version
3 /
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE    11.2.0.3.0      Production
TNS for 64-bit Windows: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production
SQL> DROP TABLE tbl PURGE
2 /
Table dropped.
SQL> CREATE TABLE tbl(
2                   id number(6),
3                   dt date
4                  )
5    PARTITION BY RANGE(dt)
6      INTERVAL (INTERVAL '1' DAY)
7      (
8       PARTITION p1 VALUES LESS THAN (date '-857-12-31')
9      )
10 /
Table created.
SQL> select partition_name,
2          high_value
3    from user_tab_partitions
4    where table_name = 'TBL'
5 /
PARTITION_NAME HIGH_VALUE
P1             TO_DATE('-0857-12-31 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'N
               LS_CALENDAR=GREGORIAN')
SQL> INSERT
2    INTO tbl
3    VALUES(
4           1,
5           sysdate
6          )
7 /
1 row created.
SQL> DROP TABLE tbl PURGE
2 /
Table dropped.
SQL> CREATE TABLE tbl(
2                   id number(6),
3                   dt date
4                  )
5    PARTITION BY RANGE(dt)
6      INTERVAL (INTERVAL '1' DAY)
7      (
8       PARTITION p1 VALUES LESS THAN (date '-858-01-01')
9      )
10 /
Table created.
SQL> select partition_name,
2          high_value
3    from user_tab_partitions
4    where table_name = 'TBL'
5 /
PARTITION_NAME HIGH_VALUE
P1             TO_DATE('-0858-01-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'N
               LS_CALENDAR=GREGORIAN')
SQL> INSERT
2    INTO tbl
3    VALUES(
4           1,
5           sysdate
6          )
7 /
INTO tbl
ERROR at line 2:
ORA-14300: partitioning key maps to a partition outside maximum permitted number of partitions
SQL> From Logical Database Limits:
Maximum number of partitions allowed per table or index: 1024K - 1
I always thought limit implies to number of actual, not potential partitions, however it looks like I was wrong, although it makes not much sense to limit potential and not actual partitions:
SQL> select trunc(sysdate) - date '-858-01-01',
2          1024 * 1024 - 1
3    from dual
4 /
TRUNC(SYSDATE)-DATE'-858-01-01' 1024*1024-1
                        1048661     1048575
SQL> select to_char(DATE'-858-01-01' + 1048575,'MM/DD/YYYY')
2    from dual
3 /
TO_CHAR(DA
11/17/2012
SQL> So tomorrow "magic" date should increase by one day. I'll test it. But more interesting if tomorrow I will be able to insert a row that forms a new partition into table TBL.
SY.

rp0428 wrote:
The other argument is that Oracle has to be able to automatically create any partition required and it can only create 1024k - 1. So if you create yours with sysdate how could it create all of the others?Not sure I follow. What is the purpose of counting potential partitions? Partition part# iin sys.tabpart$ is not assigned based on potential partition position. If I issue a DDL to create new partition regardless of interval/non-interval partitioning Oracle has to check how many partitions table has so far or po and raise same/similar exception if partition I am asking to create is over the limit. And, in any case, knowing we can create all potential partitions at table create time doesn't mean I will not try to insert data outside the range. So there is absolutely no guarantee Oracle can automatically create any partition requested. Again, I don't understand why creating non-interval partitioned table with a single initial partition has partition count of 1:
SQL> DROP TABLE tbl1 PURGE
2 /
Table dropped.
SQL> CREATE TABLE tbl1(
2                    id number(6),
3                    dt date
4                   )
5    PARTITION BY RANGE(dt)
6      (
7       PARTITION p1 VALUES LESS THAN (date '-857-12-31')
8      )
9 /
Table created.
SQL> SELECT partition_count
2    FROM user_part_tables
3    WHERE table_name = 'TBL1'
4 /
PARTITION_COUNT
              1
SQL>And interval partitioned table with same single initial partition has partition count of 1048575:
SQL> CREATE TABLE tbl1(
2                    id number(6),
3                    dt date
4                   )
5    PARTITION BY RANGE(dt)
6      INTERVAL (INTERVAL '1' DAY)
7      (
8       PARTITION p1 VALUES LESS THAN (date '-857-12-31')
9      )
10 /
Table created.
SQL> SELECT partition_count
2    FROM user_part_tables
3    WHERE table_name = 'TBL1'
4 /
PARTITION_COUNT
        1048575
SQL> Would be interesting to find out what forces Oracle to go into potential partition mode for interval partitioning.
SY.

Maximum number of cores

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