Best practices using clusters to create the queue/notifier/bundles?

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• Error "Inverted threshold" on 'Activate changes' after creating the queue

  Hello
  
  In the Console of Administration Weblogic Server I'm trying to create a new queue by clicking 'Lock & Edit' first and then create the queue. When I do this I get an expected: message "the JMS queue was created successfully", but when I then try to click on 'Activate changes', I get a: error message 'reverse threshold '.
  
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  Any ideas what this error?
  
  Thanks in advance.

  The below error when the values of the minimum and maximum thresholds for Server JMS, JMS or JMS queues subjects have been unsettled.

  "" java.lang.IllegalArgumentException: reverse threshold ".

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  JMS servers
  Threshold messages > = MessagesThresholdLow

  JMS queues
  Threshold messages > MessagesThresholdLow

  JMS topics
  Threshold messages > MessagesThresholdLow

  Please refer to the following document for more details.
  http://docs.Oracle.com/CD/E24329_01/Web.1211/e24390/jmstuning.htm#PERFM315

  Thank you
  Vijaya

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• ORA-00600 while creating the queue table

  Hello
  I'm getting
  ERROR on line 1:
  ORA-00600: internal error code, arguments: [kcbz_check_objd_typ], [0], [0,]
  [1], [], [], [], []
  ORA-06512: at "SYS." DBMS_AQADM_SYS', line 2830
  ORA-06512: at "SYS." DBMS_AQADM', line 58
  ORA-06512: at line 2
  When creating table queue.
  The problem seems to be the name of the created object. Here's the script:
  
  CREATE OR REPLACE TYPE BNA_CHG_EVENT AS OBJECT
  (
  NUMBER (2),
  INTEGER ID
  );
  /
  
  (it works fine)
  
  BEGIN
  SYS. DBMS_AQADM. CREATE_QUEUE_TABLE
  (
  QUEUE_TABLE = > 'BNA_CHG_EVENT_QT '.
  , QUEUE_PAYLOAD_TYPE = > 'BNA_CHG_EVENT '.
  "Compatible = > ' 10.0.0 '.
  , SORT_LIST = > 'ENQ_TIME, PRIORITY '.
  , MULTIPLE_CONSUMERS = > TRUE
  , MESSAGE_GROUPING = 0 >
  , SECURE = > FALSE
  );
  End;
  /
  
  (it crashes with ora-600).
  When I change the name of BNA_CHG_EVENT_QT to the BNA_CHG_EVENT_OT object is created without errors.
  Database is Oracle Database 10 g Enterprise Edition Release 10.2.0.4.0.
  
  Any suggestions on the cause of the error?
  Thanks in advance
  
  ARO
  Kuba Gasiorowski

  ERROR on line 1:
  ORA-00600: internal error code, arguments: [kcbz_check_objd_typ], [0], [0,]
  [1], [], [], [], []
  ORA-06512: at "SYS." DBMS_AQADM_SYS', line 2830
  ORA-06512: at "SYS." DBMS_AQADM', line 58
  ORA-06512: at line 2

  Check on the support of Oracle
  If you have upgraded DB to 10g, check 8247215 Bug

  Workaround
  A temporary workaround is to set dbblock_check_objtyp = false

• Oracle best practices Discussion advantages/disadvantages of the use of synonyms

  Share your experience, given the advantages/disadvantages development database of Enterprise Applications using public and private synonyms.
  
  My recommendation to the developers on my team is to avoid using Public synonyms in their code and instead fully qualify the object of database by the owner of the schema.
  
  Benefits: When you delete a schema, you do not drop the public synonyms they created. So if you use synonymous, make it private and not public.
  
  Please, share your experience!

  From my experience, synonymous public are the number 1 name collisions cause. So they stop completely the possibility of the consolidation of databases and Instance and potentially end up costing huge customer money in useless Oracle licenses.

  A much better way to the level of development would be to use ALTER SESSION SET CURRENT_SCHEMA when possible and minimizes the use of any synonyms. When synonyms are necessary, they should be synonymous private and should be handled by the application.

  IMO :-)

  Published by: Hans Forbrich, November 4, 2009 12:59

• ESXI4 installation, best practices RAID, Stripe size, VD, the partitions?

  Hi all

  I have server Dell Poweredge PE2970 with PERC6 / I and PERC6/E RAID controllers.

  and the Bay of Dell Powerwault MD1000 storage.

  PERC6 / I is conducted 6 x 150 GB, 10,000 rpm, SATA drives. (560 GB RAID 6) and,

  PERC6/E is engine x 15 x 1 TB 5400 RPM, SATA drives. (12 to RAID 6)

  This combination is used to provide iSCSI and NFS services for film and music production environment.

  I plan to create 3x100Gb, 1x200Gb, and 1x60Gb virtual disks of 560 GB RAID 6 array.

  60 GB to install VMware ESXI4 and StorMagic SvSAN.

  100 GB for virtual machines (Linux, Windows, NFS, AD, backup, servers etc.)

  100 GB for Audio iSCSI (work Pro Tools disk)

  100 GB for video iSCSI (work Pro Tools disk)

  200 GB for iSCSI Virtual Instruments (used by Pro tools)

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  How to create these virtual disks when I create RAID arrays?

  What Strip size to use?

  How about this VD 60 'system' VD ESXI4 and SvSAN, or 100 GB 'virtual machine' for other servers?

  I had to do it like this, or should I create a 160 GB VD, for all the servers and facilities of ESXI?

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  for the system and servers, and have a second table MD1000 for iSCSI disks dedicated 10,000 rpm. But for now, it's how to deal with.

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  Concerning

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  Keep it simple and straightforward unless you have a specific reason to diverge.

  Let me paraphrase what mentions a dev to vmware, (it was in what concerns the amendment of vmfs default block size and I like to think that it is also applied to vmware Scheduler, a great great piece of programming). "We optimize, so you can just go with the default value and know he's going to do the right thing."

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  Dell has a ton of technical documents by comparing the performance of raid levels.  Already a few months that we are talking about performance raid comparng and I whimper.

  If it needs to be super fast I pick up 10, lots of space 5, more reliable but more space, and then from 10 to 6.

  Dell technology said that most of the people raid 5, because disk is so reliable.

  We use raid 6 for reliability on volumes in addition to 12. Depending on the level of incorrigible error on a raid of 12 to rebuild.

  http://m.ZDNet.com/blog/storage/why-RAID-6-stops-working-in-2019/805 (which implies an ure 12^{14 and I think I'm 12 years old company records}15 ure).

  The backup raid controller cache battery alleviates some of the supposed raid 6 over raid 5 performance drops.

  In your case I use raid 5 for warehouses of operational data for performance and raid 6 for the backup data store.

  In addition a synthetic benchmark not always told you the return you will get with a real application in an operating system.

  When we first virtualized mysql, according to our benchmark iometer, we thought performance would be an order of magnitude worse. In practice, they were good enough that we went hog wild and virtualized of many others.  You should always be aware of the performance characteristics of your application.

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  The funniest on the axles and raid controllers, it's that sometimes a lot of slower batteries will out perform less higher speed axes.

  If you think you aggregate read the md1000 on performs faster small volume.

  Battery learn cycle is running all 90 days or more and turn off the cache writeback, which hurt performance. He must run because the cache battery degrades over time, and he needs to know when the battery lasts less than 24 hours.  It determines this by measuring the time it takes to recharge.

  We have never noticed this or necessary to adjust it to our server by default openmanage farm, I just thought I would mention it because we were on a subject very.

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  What is considered to allow faster connections: setting options in the vWorksapce of management of user environment or by using Group Policy to apply settings?

  When environment vWorkspace user settings apply to what is group policy? Before or after?

  Hi John,.

  I think it depends on what you're trying to reach. It may also depend on if you have users outside of your virtual desktop environment, if you do, then group policy may be the best meet the needs of all your users.

  I've seen good results with combined required Windows and metaprofiles vWorkspace profiles.

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  I hope this helps.

  Thanks, Sam