Log File after fix KB3024815

Hi,
hot fix http://support.microsoft.com/kb/3024815
RESOURCE_SEMAPHORE_QUERY_COMPILE..............
After I placed this fix on SQL 2014 Cluster, the compilation time was okay, but the following issue occured.
When rebuilding an index with a size of 10MB in the log fail are recorded 70MB which caused the rebuild time to increase x7 because of the x7, an increase of x7 is required to the I/Ops and HDD for the log.
For example:
Size before rebuild this index
index: 24544.00KB
Log File: 833024.00KB
Size after rebuild this index
index: 24592.00KB
Log File: 1008000.00KB
So log increase 7.1151594 times from index size.
Am I the only one experiencing this issue or is there a bug when this fix is placed on the cluster ?
Regards,
Jeff

Hi Jeff,
Glad to hear that the issue is resolved. Thanks for your sharing, other community members could benefit from your solution.
Thanks,
Lydia Zhang
Lydia Zhang
TechNet Community Support

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> I have taken backup yesterday monrning in Archive log mode but have lost all the archive log files.
You mean you have taken an online backup and lost all your archive log files after that online backup?
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Attachments:
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milkbottlec wrote:
Just found some error when the data are saved.
At some point, there data just copy this whole thing and save in the middle of the excel
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Regarding the headings in the middle of your file, I imagine the filename changed temporarily. When the name changed BACK to an exisiting name, the headings were added (anticipating a new file.) I'm more curious about the "lost" data problem. Do you still see holes in the data? If so, were any bad filenames recorded?
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Cheers!
"Inside every large program is a small program struggling to get out." (attributed to Tony Hoare)

Restoring offline log file

Dear Friends,
I am facing problem to restore last backuped offline log file.
I have succefully completed homogeneous system copy (i.e. SAP ECC 6.0 with Oracle 10g on Wndows 2003 platform) through backup/restore procedure & system comes to consistent stage & able to login properly.
Now I want to restore other offline redolog files in the above system.
e.g. Previously I have imported log sequence upto 750. Now I want to recover logfiles from log seq. 751 onwards.
Pls. help to recover other offline log files after system is consistent.
Thanks in advance,
Abhishek

Not possible.
Once you opened your database (and logged in successfully), no more recover actions can be done.

IMP: How to Read LOG Files

Hey Gurus,
   I want to read the log files after executing SE37 t-codes, I tried in sm21 but i didnt get any result.
   Can U tell me how to read the log files ??
   what is T-code for that? or i have change any settings???
Thanking You,
    Regards
   J Sarathi

Hi ,
You can use these two FM for analysing the log ..
               APPL_LOG_READ_INTERN
               APPL_LOG_DISPLAY_INTERN
Or You can create A Zprogram using this FM
and check the changes using RSDEPEND

SQL log file size is extending rapidly

Hello All,
We are using ECC 6.0, our database is SQL 2005 & operating system is Windows NT 4x AMD64 L.
Our database log file size is increasing rapidly, now its size is more than the all 4 data files (near about 300gb).
Last week I tried to shrink log file but it didn't worked.
Now less space is remained on disk, please help me.
Now the system is started giving dump at the time of log in, & the dump is like "START_CALL_SICK ".
I am attaching dump error text file.
Please help why is this happening.
Thanks in advance
Mahendra

Hi,
I have backed up log file & shrink the file but it didn't worked for me
What is the result? It shrinks the log and release all the space (for all committed transactions).
How can i add another log file?
Can i delete old log file after adding new log file.
You can add another log file by following below steps. but in your case, this is not the right solution because you have good amount of log file configuration for your database (now its size is more than the all 4 data files (near about 300gb)).
Open SQL server management studio > Expand database > Right click on database > Select Files > Click on Add > Give the input parameters (Logical file name, path, initial size etc.) click on OK
If system is not allowing you to shrink the log file, it means you have active transactions in system which are continuously using your log file.
Regards,
Nick Loy

Log file sync spike

We have just deployed a 4-node RAC cluster on 10GR2. We force a log switch every 5 minutes to ensure our Dataguard standby site is relatively up to date, we use the ARCH to ship logs. We are running to a very fast HP XP 12000 with massive amounts of write cache, so we never actually write straight to disk. However everytime we do a log switch and archive the log, we see a massive spike in the log file sync event. This is a real-time billing system so we monitor transaction response times in ms. Our response time for a transaction can go from 8ms to around 500ms.
I can't understand why this is happening, not only are our disks fast but we are also using asynch I/O and ASM. Surely with asynch I/O you should never wait for a write to complete.

Log file sync event happens when client wait for LGWR finishes write to the log file after client said 'commit'. The way to reduce the number of the 'Log file sync' events is to increase the speed of LGWR process or not to commit that often.
You've described your disk system as very fast - what is the amount of data you write on every log switch? How does the performance of this write relates to your disk system tests? what block size did you use when testing the disk system? as far as I remember the LGWR uses OS block size and not the DB block size to write data to the disk. Try to experiment on your test system - put your log files on the virtual disk created in RAM and run the test case - do you see the delays?
With such restrictions for the transaction time you may want to look at Oracle Times-Ten database (http://www.oracle.com/database/timesten.html)
Since you've mentioned the 10gR2 you could probably use the new feature - asynchronous commit - in this case your transaction will not wait for the LGWR process. Be aware that using the NOWAIT commit opens a small possibility of data loss - the doc describes it quite clear.
http://download-east.oracle.com/docs/cd/B19306_01/appdev.102/b14251/adfns_sqlproc.htm#CIHEDGBF
Mike

Log File after fix KB3024815

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