IFS and Data Cache Configuration

Hi!!
i installed 9iAs Enterprice Edition on my machine that already had Oracle db 8.1.7, i'm trying to set up ifs, but when i choose the option "Oracle8i is on THIS machine" in the ifs wizard i've got a protocol adapter error, if i choose the option "oracle8i on another machine" i solved the problem, why is this happening???
the other problem it's with theb database cache i started the wizard, but in 16% when it's creating the cache it stoped it didn't show any error, i leaved for 2 days but it just reached the 16% and stayed ther.
could you please help me..

For iFS configuration on Enterprise Edition you can't select the option, "Oracle8i is on THIS machine". Actually this is a typo. This should be "Oracle8i is on THIS oracle_home". This will be fixed in future releases. iFS can't be configured against database cache(icache) also. So definitly you need a database which is on another oracle_home and you should select the second option, "oracle8i on another machine".
From the second problem, I assume you are installing 9iAS on a Windows NT platform. On NT, sometimes database cache hangs. I assume it is mainly because of less memory. How much is the memory in your system? Are you running so many processes on the system while cache configuration? If so, reduce it as much as you can and retry for cache configuration. You may need to manually shutdown one SQLPLUS.EXE process in 'Task manager' started from the current cache configuration before retrying the config.

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if my block size is 37464 then what should my CALCLOCKBLOCK size in the cfg.file be
Per doc (Max=half of the number of block that can fit in to the data cache)
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Edited by: Next Level on Jul 4, 2012 2:05 AM
Edited by: Next Level on Jul 4, 2012 2:11 AM
Edited by: Next Level on Jul 4, 2012 2:35 AM

FWIW, I have never, and I mean never touched CALCLOCKBLOCK. I can see why one might want to fiddle with it, but in 18 years (yikes!) of BSO development, I have never seen a reason to do it.
Why do you want to change that value? 99.999% of the time, the issue isn't the number of blocks in memory isn't the issue, but the ability to have the default (I think) 100 blocks in memory. I suppose one could have a calc that touches more blocks, but I have never seen it. It would be slow, for sure and I would likely find another way to do the calc.
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Data File Cache / Data Cache

I have a few Questions regarding Data File cache and data cache. based on teh size of the application.
All the settings are changed by using a maxl script.
1. Data File cache-50MB,Data Cache - 100MB
I am using Buffered I/O, then will memory be allocated to Data File cache?
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Essbase data cache setting not registering

Hi,
We have 64-bit essbase. I changed the data and Index cache setting (storage type Buffered IO) in essbase.
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when create a named data cache on ase 12.5, it will setup 2K I/O buffer pool by default with Configured size=0, wash size = 60M
1. if 2K can be changed to 8K for this buffer pool?
2. If add another 16k buffer pool, should Affected Pool be changed to the right pool?
3. How to decide then pagesize, configured size and wash size for a buffer pool? Are they part of total memory size allocated for this cache?

> 1. if 2K can be changed to 8K for this buffer pool?
You should be able to create an 8K i/o pool, then drop the 2k pool by setting its size to 0.
> 2. If add another 16k buffer pool, should Affected Pool be changed to the right pool?
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> 3. How to decide then pagesize, configured size and wash size for a buffer pool? Are they part of total memory size allocated for this cache?
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Dynamic Calc processor cannot lock more than [100] ESM blocks during the calculation, please increase CalcLockBlock setting and then retry(a small data cache setting could also cause this problem, please check the data cache size setting).

Hi,
Our Environment is Essbase 11.1.2.2 and working on Essbase EAS and Shared Services components.One of our user tried to run the Cal Script of one Application and faced this error.
Dynamic Calc processor cannot lock more than [100] ESM blocks during the calculation, please increase CalcLockBlock setting and then retry(a small data cache setting could also cause this problem, please check the data cache size setting).
I have done some Google and found that we need to add something in Essbase.cfg file like below.
1012704 Dynamic Calc processor cannot lock more than number ESM blocks during the calculation, please increase CalcLockBlock setting and then retry (a small data cache setting could also cause this problem, please check the data cache size setting).
Possible Problems
Analytic Services could not lock enough blocks to perform the calculation.
Possible Solutions
Increase the number of blocks that Analytic Services can allocate for a calculation:
Set the maximum number of blocks that Analytic Services can allocate to at least 500.
If you do not have an $ARBORPATH/bin/essbase.cfg file on the server computer, create one using a text editor.
In the essbase.cfg file on the server computer, set CALCLOCKBLOCKHIGH to 500.
Stop and restart Analytic Server.
Add the SET LOCKBLOCK HIGH command to the beginning of the calculation script.
Set the data cache large enough to hold all the blocks specified in the CALCLOCKBLOCKHIGH setting.
Determine the block size.
Set the data catche size.
Actually in our Server Config file(essbase.cfg) we dont have below data added.
CalcLockBlockHigh 2000
CalcLockBlockDefault 200
CalcLockBlocklow 50
So my doubt is if we edit the Essbase.cfg file and add the above settings and restart the services will it work? and if so why should we change the Server config file if the problem is with one application Cal Script. Please guide me how to proceed.
Regards,
Naveen

Your calculation needs to hold more blocks in memory than your current set up allows.
From the docs (quoting so I don't have to write it, not to be a smarta***:
CALCLOCKBLOCK specifies the number of blocks that can be fixed at each level of the SET LOCKBLOCK HIGH | DEFAULT | LOW calculation script command.
When a block is calculated, Essbase fixes (gets addressability to) the block along with the blocks containing its children. Essbase calculates the block and then releases it along with the blocks containing its children. By default, Essbase allows up to 100 blocks to be fixed concurrently when calculating a block. This is sufficient for most database calculations. However, you may want to set a number higher than 100 if you are consolidating very large numbers of children in a formula calculation. This ensures that Essbase can fix all the required blocks when calculating a data block and that performance will not be impaired.
Example
If the essbase.cfg file contains the following settings:
CALCLOCKBLOCKHIGH 500 CALCLOCKBLOCKDEFAULT 200 CALCLOCKBLOCKLOW 50
then you can use the following SET LOCKBLOCK setting commands in a calculation script:
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means that Essbase can fix up to 500 data blocks when calculating one block.
Support doc is saying to change your config file so those settings can be made available for any calc script to use.
On a side note, if this was working previously and now isn't then it is worth investigating if this is simply due to standard growth or a recent change that has made an unexpected significant impact.

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Sriram
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Question about MAXCPU and clearing data cache

Hi all,
We're running MaxDB 7.6.03.15 and have following questions. I apologize for not grouping them together with my earlier set of questions along the similar lines.
1. What would be an appropriate value for our application for MAXCPU when running on a quad processor machine. The application consists of the MaxDB along with 4 windows services and an instance of tomcat. Can we use 4 for MAXCPU or does it always need to be something less than the total number of CPUs on the machine (less than 4 here?). Please advise.
2. When we're doing query execution time analysis we need to be able to clear data cache in between query runs. We achieve this so far by simply bringing the database offline and then online again. The problem with this approach is its time consuming and if we do 100 query runs a lot of time is spent in waiting for the database go from online to offline to online again. Please let us know if there's an alternative faster way to achieve the same.
Thanks for your time.
Sincerely,
Sameer

> 1. What would be an appropriate value for our application for MAXCPU when running on a quad processor machine. The application consists of the MaxDB along with 4 windows services and an instance of tomcat. Can we use 4 for MAXCPU or does it always need to be something less than the total number of CPUs on the machine (less than 4 here?). Please advise.
Of course you may set MAXCPU to 4 - but you risk that the four Usertask UKTs will use up all CPU resources on your system then.
So it is usually better to be rather defensive with this. If you're unsure about the CPU needs of your other services better try out and check starting with MAXCPU 2.
> 2. When we're doing query execution time analysis we need to be able to clear data cache in between query runs. We achieve this so far by simply bringing the database offline and then online again. The problem with this approach is its time consuming and if we do 100 query runs a lot of time is spent in waiting for the database go from online to offline to online again. Please let us know if there's an alternative faster way to achieve the same.
Well, x_cons pagecache_release should do that for you.
But I never was able to really see the effect of it (e.g. reading the pages in again).
If I'm not mistaken in this point - which is pretty easy because the command is rarely used and sparsely documented - it just moves the pages to the lower end of the lru list and thereby making them candidates for getting moved out of cache but not actually doing it.
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Then you don't have to bounce your instance.
regards,
Lars

IFS and Data Cache Configuration

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