Log writer waiting & buffer waiting for busy

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  Thank you.

  Grant

  Hi Grant

  {module_logout}

  In the online documentation: http://kb.worldsecuresystems.com/134/bc_1345.html#main_Secure_Zones_Modules
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• What is the purpose of waiting for redo log files

  Hello
  
  What is the purpose of the log files waiting for redo in the Dr?
  
  What happens if the standby redo log files are created? or else is not created?
  
  Please explain
  
  Thank you

  Re: what is the difference between onlinelog and standbylog

  I mentioned the goal of the eve of the redo log in RD files in above thread.

  Concerning
  Girish Sharma

• waiting for buffer busy

  Hello
  
  
  I'm huge buffer expects busy events on my database and its increase
  
  This is the result of query on my database (9.2.0.8.0)
  
  SQL > select event, total_waits from v$ system_event where a test of ("free buffer waits", "buffer expects busy")
  2;
  
  TOTAL_WAITS EVENT
  ---------------------------------------------------------------- -----------
  buffer without waiting for 118
  buffer busy waits 12827
  
  
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  Please someone let me know even if the 'segment of space management' is on 'auto', why expect busy buffer is so huge
  
  And how to reduce this event
  
  Concerning

  Hello

  Here's how to find the cause of a busy wait buffer:

  http://www.DBA-Oracle.com/art_builder_bbw.htm

  I hope this helps...

  Donald K. Burleson
  Oracle Press author
  Author of "Oracle Tuning: the definitive reference".
  http://www.rampant-books.com/t_oracle_tuning_book.htm
  "Time flies like an arrow; Flies to fruit like a banana.

• Waiting for redo log

  Hello
  in 10g R2 what are / can be the causes of waiting for redo log?
  
  Thank you.

  example of waiting for recovery logs causes may be:
  -does not redo groups (remember to add one more, if necessary)
  -low rate of I/O
  -Redo large log buffer (take a long time for the dump file data) - refers to the slow storage
  -application hurt writes, making many validations

  Run the Advisor of the ADDM, and see the recommendations. Look at the first 5 albums events. Maybe it's not relevant to DBTime?

• Waiting for redo log file missing when restore main database using RMAN backup that was taken on the database physical standby

  Here's my question after tons of research and test without have the right solutions.

  Target:

  (1) I have a 12.1.0.2 database unique main enterprise 'testdb' as database instance running on the server "node1".

  (2) I created physical standby database "stbydb" on the server "node2".

  (3) DataGuard running on the mode of MaxAvailability (SYNC) with roll forward in real time 12 default c apply.

  (4) primary database has 3 groups of one-man redo. (/oraredo/testdb/redo01.log redo02.log redo03.log)

  (5) I've created 4 standby redo logfiles (/oraredo/testdb/stby01.log stby02.log stby03.log stby04.log)

  (6) I do RMAN backup (database and archivelog) on the site of relief only.

  (7) I want to use this backup for full restore of the database on the primary database.

  He is a DR test to simulate the scenario that has lost every primary & Eve total servers.

  Here is how to save, on the database pending:

  (1) performance 'alter database recover managed standby database Cancel' to ensure that compatible data files

  (2) RMAN > backup database;

  (3) RMAN > backup archivelog all;

  I got elements of backup and copied to primary db Server something like:

  /Home/Oracle/backupset/o1_mf_nnndf_TAG20151002T133329_c0xq099p_.BKP (data files)

  /Home/Oracle/backupset/o1_mf_ncsnf_TAG20151002T133329_c0xq0sgz_.BKP (spfile & controlfile)

  /Home/Oracle/backupset/o1_mf_annnn_TAG20151002T133357_c0xq15xf_.BKP (archivelogs)

  So here's how to restore, on the main site:

  I clean all the files (data files, controlfiles oder all gone).

  (1) restore spfile from pfile

  RMAN > startup nomount

  RMAN > restore spfile from pfile ' / home/oracle/pfile.txt' to ' / home/oracle/backupset/o1_mf_ncsnf_TAG20151002T133329_c0xq0sgz_.bkp';

  (2) modify pfile to convert to db primary content. pFile shows below

  *.audit_file_dest='/opt/Oracle/DB/admin/testdb/adump '

  * .audit_trail = "db".

  * full = '12.1.0.2.0'

  *.control_files='/oradata/testdb/control01.ctl','/orafra/testdb/control02.ctl'

  * .db_block_size = 8192

  * .db_domain = "

  *.db_file_name_convert='/testdb/','/testdb /'

  * .db_name = "testdb".

  * .db_recovery_file_dest ='/ orafra'

  * .db_recovery_file_dest_size = 10737418240

  * .db_unique_name = "testdb".

  *.diagnostic_dest='/opt/Oracle/DB '

  * .fal_server = "stbydb".

  * .log_archive_config = 'dg_config = (testdb, stbydb)'

  * .log_archive_dest_2 = "service = stbydb SYNC valid_for = (ONLINE_LOGFILE, PRIMARY_ROLE) db_unique_name = stbydb'"

  * .log_archive_dest_state_2 = 'ENABLE '.

  *.log_file_name_convert='/testdb/','/testdb /'

  * .memory_target = 1800 m

  * .open_cursors = 300

  * runoff = 300

  * .remote_login_passwordfile = "EXCLUSIVE."

  * .standby_file_management = "AUTO".

  * .undo_tablespace = "UNDOTBS1.

  (3) restart db with updated file pfile

  SQLPLUS > create spfile from pfile='/home/oracle/pfile.txt'

  SQLPLUS > the judgment

  SQLPLUS > startup nomount

  (4) restore controlfile

  RMAN > restore primary controlfile to ' / home/oracle/backupset/o1_mf_ncsnf_TAG20151002T133329_c0xq0sgz_.bkp';

  RMAN > change the editing of the database

  (5) all elements of backup catalog

  RMAN > catalog starts by ' / home/oracle/backupset / '.

  (6) restore and recover the database

  RMAN > restore database;

  RMAN > recover database until the SNA XXXXXX; (this YVERT is the maximum in archivelog backups that extends beyond the scn of the backup of the data file)

  (7) open resetlogs

  RMAN > alter database open resetlogs;

  Everything seems perfect, except one of the file log roll forward pending is not generated

  SQL > select * from v$ standby_log;

  ERROR:

  ORA-00308: cannot open archived log ' / oraredo/testdb/stby01.log'

  ORA-27037: unable to get file status

  Linux-x86_64 error: 2: no such file or directory

  Additional information: 3

  no selected line

  I intended to use the same backup to restore primary basic & helps record traffic and the downtime between them in the world of real output.

  So I have exactly the same steps (except STANDBY restore CONTROLFILE and not recover after database restore) to restore the database pending.

  And I got the same missing log file.

  The problem is:

  (1) complete alert.log filled with this error, not the concern here

  (2) now repeat it in real time apply won't work since the Party shall LGWR shows always "WAITING_FOR_LOG."

  (3) I can't delete and re-create this log file

  Then I tried several and found:

  The missing standby logfile was still 'ACTIVE' at present RMAN backup was made.

  For example, on db standby, under Group #4 (stby01.log) would be lost after the restoration.

  SQL > select GROUP #, SEQUENCE #, USE (s), the STATUS from v$ standby_log;

  GROUP # SEQUENCE # USED STATUS

  ---------- ---------- ---------- ----------

  4 19 ACTIVE 133632

  5 0 0 UNASSIGNED

  6 0 0 not ASSIGNED

  7 0 0 UNASSIGNED

  So until I take the backup, I tried on the primary database:

  SQL > alter system set log_archive_dest_state_2 = delay;

  This was the Group of standby_log side Eve #4 was released:

  SQL > select GROUP #, SEQUENCE #, USE (s), the STATUS from v$ standby_log;

  GROUP # SEQUENCE # USED STATUS

  ---------- ---------- ---------- ----------

  4 0 0 UNASSIGNED

  5 0 0 UNASSIGNED

  6 0 0 not ASSIGNED

  7 0 0 UNASSIGNED

  Then, the backup has been restored correctly without missing standby logfile.

  However, to change this primary database means break DataGuard protection when you perform the backup. It's not accept on the production environment.

  Finally, my real questions come:

  (1) what I do may not do on parameter change?

  (2) I know I can re-create the control file to redo before delete and then recreate after. Is there any simple/fast to avoid the standby logfile lost or recreate the lost one?

  I understand that there are a number of ways to circumvent this. Something to keep a copy of the log file waiting restoration progress and copy up one missing, etc, etc...

  And yes I always have done no real-time applies "to the aid of archived logfile" but is also not accept mode of protection of production.

  I just want proof that the design (which is displayed in a few oracle doc Doc ID 602299.1 is one of those) that backs up data backup works effectively and can be used to restore the two site. And it may be without spending more time to resume backups or put the load on the primary database to create the database before.

  Your idea is very much appreciated.

  Thank you!

  Hello

  1--> when I take via RMAN backup, RMAN does not redo log (ORL or SRL) file, so we cannot expect ORLs or SRL would be restored.

  2nd--> when we opened the ORL database should be deleted and created

  3rd--> Expecting, SRL should not be an issue.we should be able to do away with the fall.

  DR sys@cdb01 SQL > select THREAD #, SEQUENCE #, GROUP #, STATUS from v$ standby_log;

  THREAD # SEQUENCE # GROUP # STATUS

  ---------- ---------- ---------- ----------

  1 233 4 ACTIVE

  1 238 5 ACTIVE

  DR sys@cdb01 SQL > select * from v$ logfile;

  GROUP # STATUS TYPE MEMBER IS_ CON_ID

  ---------- ------- ------- ------------------------------ --- ----------

  3 /u03/cdb01/cdb01/redo03.log no. 0 online

  /U03/cdb01/cdb01/redo02.log no. 0 2 online

  1 /u03/cdb01/cdb01/redo01.log no. 0 online

  4 /u03/cdb01/cdb01/stdredo01.log WATCH No. 0

  /U03/cdb01/cdb01/stdredo02.log EVE 5 No. 0

  DR sys@cdb01 SQL > ! ls - ltr /u03/cdb01/cdb01/stdredo01.log

  method: cannot access the /u03/cdb01/cdb01/stdredo01.log: no such file or directory

  DR sys@cdb01 SQL >! ls - ltr /u03/cdb01/cdb01/stdredo02.log

  -rw - r-. 1 oracle oinstall 52429312 17 Oct 15:32 /u03/cdb01/cdb01/stdredo02.log

  DR sys@cdb01 SQL > alter database force claire logfile 4;

  change the database group claire logfile 4

  *

  ERROR on line 1:

  ORA-01156: recovery or current flashback may need access to files

  DR sys@cdb01 SQL > alter database recover managed standby database cancel;

  Database altered.

  DR sys@cdb01 SQL > change the database group claire logfile 4;

  Database altered.

  DR sys@cdb01 SQL > ! ls - ltr /u03/cdb01/cdb01/stdredo01.log

  -rw - r-. 1 oracle oinstall 52429312 17 Oct 15:33 /u03/cdb01/cdb01/stdredo01.log

  DR sys@cdb01 SQL >

  If you do, you can recreate the controlfile without waiting for redo log entry...

  If you still think it's something is not acceptable, you must have SR with support to analyze why he does not abandon SRL when controlfile_type is "underway".

  Thank you

• waiting for redo log deleted

  Oracle 11 g 2 (11.2.0.3) Linux x86_64

  A silly mistake was made. While recreate redo standby logfiles, I managed to remove (rm command) waiting for redo log file in progress (before the end of the application) of the BONE. Now I see in the log of alerts:

  ORA-00313: open failed for members of log group 7 of thread 1
  ORA-00312: online log 7 thread 1: ..../standby_redo7.log'
  ORA-27037: unable to obtain file status
  Linux-x86_64 Error: 2: No such file or directory
  Additional information: 3
  

  What are my options at this point? I have to any cancelled transaction? The settlement seems to be moving right on the property. Where am I people?

  Thanks to you all.

  Hello

  1 ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;

  2. ALTER LOGFILE GROUP 7 CLEAR DATABASE;

  3 ALTER DATABASE DROP STANDBY LOGFILE GROUP 7;

  4. ALTER DATABASE ADD STANDBY LOGFILE GROUP 7;  OR ALTER DATABASE ADD LOGFILE MEMBER '' HELPS GROUP 7;

  5. START AGAIN APPLY: ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CURRENT LOGFILE USING DISCONNECT FROM THE SESSION;

  HTH

  Tobi

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  Hi Jody,.

  Please post on the Adobe forums.

  Internet Explorer (and even other browsers) sometimes finiky when used with a program in administrator mode.

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  Kind regards

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• Adobe Acrobat Reader DC - failed to access Acrobat Capture Web installation. Acrobat may be busy or waiting for input

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  I used the Web Page Add to... the daily option. I then installed, to fix a different problem, Adobe Acrobat Reader Version DC 2015.008.20082 (later from this post). Now, when I choose to add a Web Page in existing PDF... option, I get the error popup:

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  The free software Adobe Reader doesn't have these features. They are part of Acrobat (not free) - as far as I know; only with the Pro version.

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• Why read the session waits for the command of logfile (checkpoint incomplete)?

  Hello
  
  I session which States only, or better to say, I think he reads alone (I think the waiting list of events). There is full expectation of events for this session. I do not understand why this session expected to wait to log file switch (checkpoint incomplete) event. Can someone explain it to me?
  

  {noformat}
  EVENT                                  TIME_WAITED
  db file sequential read                    441014
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  SQL*Net message from client                194635
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  Thank you
  
  Jakub.

  Blocks of database entries are by DBWR, not dedicated server process: so if a session database issues some write actions that they cannot be declared with corresponding wait events in the user database session, but you will see waiting for associated events to make journal entries because database session must either wait to VALIDATE the execution returns (redo written log is made by LGWR and not by dedicated server process) or the order of log file (also made by LGWR).

  You can see sort in http://download.oracle.com/docs/cd/E11882_01/server.112/e16508/process.htm#BABHJDHD
  and in the complete picture and great http://landingpad.oracle.com/webapps/dialogue/ns/dlgwelcome.jsp?p_ext=Y&p_dlg_id=9575302&src=7027600&Act=54.

  Edited by: P. Forstmann on 19 Jan. 2011 17:36

• Waiting for VISA c# on QR

  I am trying to write a simple program in c# (.NET 4.0) to control a Keithley 2400 SMU by VISA GPIB and I'm unable to switch to the program to wait as the demand for services which the Keithley send at the end of the scan.

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  I am able to send orders to the SMU and read data buffer, but only if I manually enter a timeout between the scan start command and the command to read data.

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  Console.WriteLine("Starting Sweep");
  mbSession.Write(":OUTP ON;:INIT");
  
  int timeout = 10000;             // milliseconds
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  // Turn off the SMU.Console.WriteLine("I hope the sweep is done, cause I'm tired of waiting");
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  // Close session
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  All the foregoing is supposed to imitate this LabVIEW code:

  

  So, any ideas on where I'm wrong?

  Thank you

  It turns out that I need to activate the event as a queue rather than a Manager:

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  Must be:

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  Source: the documentation under the heading "remarks". It was a pain to find documentation about it... NEITHER needs to make it easier :-(.

  With this change, I also don't need to create the MessageBasedSessionEventHandler.

  The final, labour code (with fluff like the namespaces and classes deleted) looks like:

  rm = ResourceManager.GetLocalManager().Open("GPIB0::25::INSTR");
  MessageBasedSession mbSession = (MessageBasedSession)rm;
  MessageBasedSessionEventType srq = MessageBasedSessionEventType.ServiceRequest;
  mbSession.EnableEvent(srq, EventMechanism.Queue); // Note QUEUE, not HANDLER
  int timeout = 10000;// Start the sweep
  mbSession.Write(":OUTP ON;:INIT");
  
  // This waits for the Service Request
  mbSession.WaitOnEvent(srq, timeout);// After the Service Request, turn off the SMUs and get the data
  mbSession.Write(":OUTP OFF;:TRAC:FEED:CONT NEV");
  string data = mbSession.Query(":TRAC:DATA?");
  mbSession.Dispose();
  

  I hope this helps future programmers.

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  Hello world

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  Any help appreciated.

  Thank you

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  OK - problem solved.

  OBIEE sends the page indicating that it is looking up until the actual data returned.  There is an option on the Weblogic OBIEE server in the {WEBLOGIC_HOME}/instances/bi_instance/config/OracleBIPresentationServicesComponent/coreapplication_obips1/instanceconfig.xml file that can be defined (for test/debugging) to delay sending the screen holder place 'research'.}

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  600

  True

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  I have two related questions.

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  1. What is the cause of the message "Waiting for Service ' Console CVD activity and is there anywhere that documents these meanings of status.
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  I have a computer with this status which comes to have installed the client and will not be to centralize.  Other computers seem to work properly (centralized).

  The computer is to ping requests, but appears as disconnected in the console.

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  Journal of the history of CVD below

  Description of the Type of weather

  31/01/2014-08:52:32 AUDIT_EVENT assign device, device: PC30866 (1995), cardiovascular disease: 11614, political CVD: don't Default - every 4hrs - no drive D (1.1)

  02/05/2014-13:53:58 politics AUDIT_EVENT assign CVD, CVD: PC30866 (11614), CVD policy: Migration Post-quotidien (1.0)

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  Diseases cardiovascular diseases cardiovascular name Type State layer size (MB) data transferred (MB) branch reflector savings start time end time transfer (MB)

  Of the endpoint PC30866 centralize 11614 reading disc failed 169648 1531 0 31/01/2014 12:30:37 05 d 04:16:52

  The next event is in the application event log and the Mirage event log for the failed computer. (there were not all other errors in the paper since the deployment of mirage customer and there is no errors in the system event log)

  Event type: error
  Event source: VMware Horizon Mirage customer
  Event category: no
  Event ID: 0
  Date: 31/01/2014
  Time: 20:44:46
  User: n/a
  Computer: PC30866
  Description:
  Error general service office
  Unexpected exception taken (sender Name:Wanova.Desktop.Service.exe
  There is no policy context.
  , the object exception System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown.
  System.Collections.Generic.List to ' 1.set_Capacity (Int32 value)
  System.Collections.Generic.List to ' 1.EnsureCapacity (Int32 min)
  to System.Collections.Generic.List' 1. Add (T item)
  at Wanova.Net.DataTransfer.TransferStreams.SignatureResponseStream.ProcessChunk (ChunkInfo chunkInfo)
  at Wanova.Net.DataTransfer.TransferStreams.ChunkInfoDecodingStream.BeginWrite (Byte [] buffer, TransferStreamWriteCallback onWriteComplete)
  at Wanova.Net.DataTransfer.DataHandler.ExecuteDataStreamTask (DataHandlerExecutionTask task, MarkCompletionCallback markCompletionCallback)
  at Wanova.Net.DataTransfer.DataHandler.ExecuteTask (IExecutionTask task, MarkCompletionCallback markCompletionCallback)
  Wanova.Net.DataTransfer.ExecutionController.QueueListener (Group IExecutionTask)
  to Wanova.Common.ThreadUtils.ParamaterizedWorkItem'1.Run (object fakeParam)
  at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context (Object state)
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  at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem)
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  at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback (), ends at True)

  For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

  It turns out that this computer seems to have hard drive errors, so not a matter of mirage.