Need clarification on OLAP Cache!!!

Hi,
This is what is to be followed to turn on or off the olap cache!!!!
SPRO -> SAP Reference-IMG
Open the tree: SAP NetWeaver -> Business Intelligence -> Performance Settings
Execute: Global Cache Settings
Check the flag: Cache Inactive
Now the question is....... if you check the "cache inactive" check box, what does it signify? does that mean cache is active or inactive? quite confusing.......
Regards,
Surya Tamada.

Hi,
Pls look on it,
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/9f4a452b-0301-0010-8ca6-ef25a095834a
Also check this,
Re: OLAP Cache issue.....
http://help.sap.com/saphelp_nw70/helpdata/en/b2/e50138fede083de10000009b38f8cf/frameset.htm
http://help.sap.com/saphelp_nw04/helpdata/en/00/241da12ef84f40bb6ecd3ae73d8b58/content.htm
Hope it helps.
Thanks & Regards,
SD

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Need Clarification on using cache along with JPA

Hi,
I am using Oracle Coherence 3.5 and Jdeveloper 11g.
I have written a sample program which implements CacheStore which performs the following operations:
Insert, Update, Delete
Configured cache-config.xml file in whcih the element cachestore-scheme is used to invoke the corressponding class and the table name.
When I tried to run the cache using the JPA-Cache-server.bat I got the values accordingly. But each and every time the data is fetched from Database. I am using distributed-scheme in the configuration file. How do I configure the file such that for the first time the values comes form DB and then next time I get values from cache.
I used the same cache name in another program and tried to retrieve the values from cache but i got only null values:(
I will be very thank full to you if any one helps me on this.
Waiting for ur response..
Thanks,
Jagadeesh

I did not change any data in DB. I tried changing data in DB and then tested I got the updated content.
Below is my configuration file.
<cache-config>
<caching-scheme-mapping>
<cache-mapping>
<cache-name>Sample*</cache-name>
<scheme-name>distributed-db-backed</scheme-name>
</cache-mapping>
</caching-scheme-mapping>
<caching-schemes>
<distributed-scheme>
<scheme-name>distributed-db-backed</scheme-name>
<service-name>DistributedCache</service-name>
<backing-map-scheme>
<read-write-backing-map-scheme>
<internal-cache-scheme>
<class-scheme>
<class-name>com.tangosol.util.ObservableHashMap</class-name>
</class-scheme>
</internal-cache-scheme>
<cachestore-scheme>
<class-scheme>
<class-name>com.oracle.coherence.handson.cachest</class-name> 
<init-params>
<init-param>
<param-type>java.lang.String</param-type>
<param-value>filest</param-value> 
</init-param>
</init-params>
</class-scheme>
</cachestore-scheme>
<read-only>false</read-only>

<write-delay-seconds>0</write-delay-seconds>
</read-write-backing-map-scheme>
</backing-map-scheme>
<listener/>
<partition-count>100M</partition-count>
<autostart>true</autostart>
</distributed-scheme>
</caching-schemes>
</cache-config>
Thanks,
Jagadeesh

Pre-fill the OLAP cache for a query on Data change event of infoprovider

Hi Gurus,
I have to pre-fill the OLAP cache for a query,which has bad performance.
I read a doc 'Periodic Jobs and Tasks in SAP BW'
which suggested sum steps to do this
i hav created the setting for Bex broadcasting for scheduling job Execution with data change in info provider
thereafter doc says "an event has to be raised in the process chain which loads the data to this InfoProvider.When the process chain executes the process u201CTrigger Event Data Change (for Broadcaster)u201D, an event is raised to inform the Broadcaster that the query can be filled in the OLAP cache."
how can this b done please provide with sum proper steps
Answers are always appreciated.
Thanks.

Hi
U need to create a process chain or use the existing process chain which you are using to load your current solution, just add event change process type in the process chian and inside it add the info provider which are going to be affected.
Once you are done with this go to the broadcaster and create new setting for that query...you will see the option for event data chainge in infoprovider just choose that and create the settings.
hope it helps

Query views are not using OLAP cache

Hi,
I am trying to pre-fill the OLAP cache with data from a query so as to improve the performance of query views.
I have read several documents on the topic, such as How to Performance Tuning with the OLAP Cache (http://www.sapadvisors.com/resources/Howto...PerformanceTuningwiththeOLAPCache$28pdf$29.pdf)
As far as I can see, I have followed the instructions and guidelines in detail on how to set up the cache and pre-fill it with data. However, when I run the query views they never use the cache. For example, point 3.4 in the abovementioned document does not correspond with my results.
I would like some input on what I am doing wrong:
1. In RSRT I have Cache mode = 1 for the specific query.
2. The query has no variables, but the following restrictions (in filter): 0CALMONTH = 09.2007, 10.2007, 11.2008 and 12.2007.
3. I have one query view with the restriction 0CALMONTH = 10.2007, 11.2008 and 12.2007.
4. I have a second query view, which builds on the same query as the first query view. This second query view has the restriction 0CALMONTH = 11.2008 and 12.2007.
5. There are no variables in the query.
6. I run the query.
7. I run the first query view, and the second query view immediately after.
8. I check ST03 and RSRT and see that cache has not been used for either of the query views.
Looking at point 3.4 in the abovementioned document, I argue that the three criteria have been fulfilled:
1. Same query ID
2. The first query view is a superset of the second query view
3. 0CALMONTH is a part of the drill-down of the first query view.
Can someone tell me what is wrong with my set-up?
Kind regards,
Thor

You need to use following process of process chain: "Attribute change run (ATTRIBCHAN)". This process needs to be incorporated into your process chains which loads data into provider on top of which your query is based.
See following links on topic how to build it:
https://help.sap.com/saphelp_nw73/helpdata/en/4a/5da82c7df51cece10000000a42189b/frameset.htm
https://help.sap.com/saphelp_nw70ehp1/helpdata/en/9a/33853bbc188f2be10000000a114084/content.htm
cheers
m./

Fill Olap cache distribution type

Hi,
I'm trying to fill the olap cache with information broadcasting, but I cannot see option "Fill olap cache" in the distribution type.
Only distribution type "broadcast E-Mail" and "Broadcast to portal" are present.
I reached the broadcasting screen from Tcode RSRT -> ABAP Web.
Is a Precalc. server required to get access to "fill olap cache" distribution type ?
How can I get access to distribution type "fill olap cache" ?
System: BW 7.01 SP06

Hi Brian,
Please check below:
Broadcasting in BI 7.x - Do I need Portal, Missing Distribution Types
Also check the expert for
In SAP NetWeaver BI 7.0 (2004s), which BEx Web functions require SAP NetWeaver 7.0 Portal?
As soon as you use any of the new BI capabilities for SAP NetWeaver 7.0 (2004s) BEx tools (such as BEx Analyzer & Broadcasting), you require usage types BI Java and Portal. The only exception is if you do not use SAP NetWeaver 7.0 BEx tools and ONLY use the old 3.x BEx tools.
https://www.sdn.sap.com/irj/sdn/nw-datamanagement?rid=/library/uuid/a5067965-0901-0010-6f8a-bbf0b7424283#q-6
-Vikram

OLAP Cache

how does OLAP Cache work?

Logical File Names
Use
To save data in a file in the cache modes Main Memory Cache with Swapping, Flat File Cache per Application Server, or Cross-Application Server (see Cache Mode), the following specifications must first be set:
●      Definition of the logical file path and assignment to a platform-specific physical path
●      Definition of the logical file name
From the Cache Monitor screen, using Logical File Names, you can access the complex table maintenance for logical file paths and names. The table maintenance consists of several subdialogs (views). SAP has delivered a proportion of the required settings.
You need to check these settings and make any necessary adjustments for your file system before you can use the persistent OLAP cache with a flat file as a background store.
Note that these assignments are subject to settings made for the transport connection (You need a request that can be transported).
Features
The following section gives an overview of the subdialog in the table maintenance using an example configuration. For more information about the procedure, see Defining Logical Path and File Names.
You can choose the following subdialogs using the dialog structure:
Logical File Path Definition
The (platform-independent) logical file path is evaluated at runtime to generate the (platform-dependent) physical path (see Assignment of Physical Paths to Logical Path).
Two examples of this are:
●        Logical file path: BW_OLAP_CACHE
Name: BI OLAP Cache
●        Logical file path: BW_OLAP_CACHE_SPAN
Name: BI OLAP Cache Cross-Application Server
Assignment of Physical Paths to Logical Path
At runtime, the physical path assigned to the corresponding operating system is generated from the logical file path.
Since the physical path is platform-dependent, the customer has to specify it. The closer the file is to the application server or, with the cross-application server cache mode, to the application server, the faster it can be found and read.
Log(ical) path: BW_OLAP_CACHE
Name: BI OLAP Cache
Syntax group: UNIX (all Unix platforms)
Phys(ical) path: /usr//global/ (You can choose the path up to <FILENAME> according to your own configuration.)
If you cannot find the relevant syntax group for file names and paths for your operating system, you can define your own (see Syntax Group Definition and Assignment of Operating System to Syntax Group).
The <FILENAME> parameter must always be set for the physical file name (see Logical File Name Definition, Cross-Client). At runtime, the complete platform-specific file name is automatically formed from the physical path and the physical file name.
Logical File Name Definition, Cross-Client
At runtime, a complete platform-specific file name including the path is generated for a (platform-independent) logical file name.
In the following example, cache data is stored on an application server:
Logical file: BW_OLAP_CACHE (we recommend you use the delivered attributes for the logical file).
Name: BI OLAP Cache Files
Phys(ical) file: CACHE___
Data format: BIN (binary)
Application area: BW (Business Information Warehouse)
Logical path: BW_OLAP_CACHE (see Logical File Path Definition). Input help is available.
In the following example, cache data is stored cross-application server:
Log(ical) file: BW_OLAP_CACHE_SPAN
Name: BI OLAP Cache Cross-Application Server
Phys(ical) file: CACHE__
Data format: BIN
Application area: BW
Log(ical) path: BW_OLAP_CACHE_SPAN
Note that a particular schema is prescribed for the physical file name:
●      For application server storage (see Global Cache Parameters and Cache Mode Main Memory Cache with Swapping and Cluster / Flat File Cache per Application Server):
CACHE___
●      For cross application server storage (see Global Cache Parameters and Cache Mode Cluster / Flat file Cache Cross-application Server):
CACHE__
The following table offers an overview of the variables that are only replaced with actual values during runtime:
Variables in Physical File Names
Variable
Meaning
<HOST>
Computer/server name (for SY-HOST).
If the data is stored cross-application server, this variable is not required.
<SYSID>
System ID
For example, if two different BI systems are running on one application server, this variable serves to differentiate the systems so that they do not overwrite each other.
<PARAM_1>
External parameter 1 (sequential number in HEX)
Definition of Variables
If you want to use variables in physical file names and paths, you can define these by choosing New Entries.
Syntax Group Definition
You can define a new syntax group for operating systems with the same syntax for file names and paths by choosing New Entries.
Syntax grp: UNIX
Name: All Unix platforms
Length (of file name)
Extension: Choose this option if the data format for the logical data name is allowed as the file name extension for this syntax group.
Active: Choose this option if the operative system for this syntax group is used in the available system configuration.
Assignment of Operating System to Syntax Group
You can assign your operating system to a syntax group by choosing New Entries if necessary.
OP system: SunOS
Name: SUN Unix
Regards,
SUBHA

Can a query view be broadcast to olap cache??

Hi,
I am trying to pre-calculate a query view to the olap cache. I do not see this option in drop down. Is it possible
Thanks

Hi,
Well the few setups of ASA + Ironport that I have seen uses an WCCP ACL on the ASA which already can define which traffic is forwarded to Ironport and which simply bypasses it and goes straight out of the ASA.
Those that need to bypass Ironport are specified in the top of the ACL with "deny" statements.
access-list WCCP line 1 deny ip host host
or
access-list WCCP line 1 deny ip host any
I am not sure if this was what you were looking to do.
- Jouni

Query mass Broadcasting to fill OLAP cache

Hi,
I have +- 50 relative small queries that I'd like to precalculate each night (push them to the OLAP cache) as these queries are displayed together in one KPI dashboard.
I know the Bex Broadcaster is the tool that should be used but at this moment I don't know any way to schedule the precalculation for ALL queries in mass. Is there a way to Broadcast queries in mass via a certain program or via any other means?
Putting them in one workbook is an option (and having this workbook precalculated) but I was wondering if there are any other solutions ?

I have now been investigating mass broadcasting via :
1 one workbook with several queries integrated
1 webtemplate with several queries integrated
But both alternatives don't offer the option "Fill OLAP Cache" in the Bex Broadcaster. It seems this is only selectable when you start the Broadcaster for one individual query ? So my conclusion is that you need to make a settings for all queries individually ? Or is there a way to change the distribution method for webtemplates ? Quite a big dissapointment for me anyway...

Filling OLAP Cache for 3 Bex queries

Dear Experts,
Here, We would required to fill the OLAP cache for four bex queries using the Broadcaster Settings.
can any one please suggest for the following.
how to schedule the OLAP chache filling for 3 different queries at a time. do we need to perform this activity individually for three times for three different queries or can we club three queries and do schedule using only one varaint.
Request you to suggests the steps for performing this activity
Thanks in advance,
Mannu

Hey,
this may be useful for you.
http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/f048c590-31a4-2c10-8599-bd01fabb93d4?quicklink=index&overridelayout=true
Regards,
Kiran

OLAP Cache for Query Performance

Hi Experts,
I have below 2 Questions before we implement OLAP Cache for our Queries:
1) We have 15 imporatant queries - which do NOT have any variable/selection screen.
(question here is will it work for those kind of queries which dont have any selection screen/ variant ? ) --> client wants to prime the cache for few queries which dont have variable screen.
In this case, say if data is later filtered on any CHAR , will it take the data from Cache?
2) I have a query which initially will have few characteristics in the drill down when we first execute and users would be drilling down on many other characteristics after that. So if I want to fill OLAP cache for this query then what is the best way so that each drilldown in the query gets data from cache.
Thank you,
-Su

Hi Raghavendra,
Thanks for your response.
For first Question, Do you mean , even if we do not have any Selection varaibale on Query--we still can fill OLAP cache for it for its all values (i.e. No selection means "*") ?
If this is the case, then what we need to defile in General Precalculation (Variable assignment) while creating a new setting for the query.
Thanks,
-Su

Impact of real time cube on query performance and OLAP cache

Hi:
We have actual and plan cubes both setup as real time cubes (only plan cube is being planned against, not actual cube) and both cubes are compressed once a day.
We are planning on implementing BIA accelerator and have questions related to query performance optimization:
1/ Is there are any query performance benefits in changing the actual cube to be a basic cube (using program SAP_CONVERT_NORMAL_TRANS) if the F table is fully compressed
2/ Can OLAP cache be leveraged for the queries run against the real time cubes e.g. actual cubes
3/ What is the impact on BIA of having the actual cube as real time (whetehr or not there is data being loaded/planned during the day in that cube)
Thank you in advance,
Catherine

1) Is there are any query performance benefits in changing the actual cube to be a basic cube (using program SAP_CONVERT_NORMAL_TRANS) if the F table is fully compressed
From the performance point of view, tha actual cubes i.e std cubes are relatively better.
2) Yes OLAP cache can be leveraged for bringing up the plan query but all the calculations are done in the planning buffer.
3) Not sure.

Olap cache not storing result sets for certain queries

Hi - another cache question
my result set for a query is not getting set in OLAP CACHE - the query variable level is stored ok but not the result set.
different queries store the result sets ok.
there is nothing in the query or cube properties that should disable the caching of the result set.
there is plenty of space available and there has not been any changes to the query or data loaded or aggregates changed.
any ideas?
cheers - Neil

I would do a performance check in RSRT2. This will usually give you some additional information related to olap cache.
Hope that helps.

Automatic filling OLAP Cache

Hi @ll,
i am using bw 3.5....
I`ve a question as to OLAP Cache. Is there any possibility/method to fill the Cache automatically every day?
Id like to use the performance enhancement of caching queries....but i would like to avoid it that the first user who execute a query have a long waiting time....
Exists there any options to handle this?
thx in advance for all answers and helpful advices
Cheers,
Marian

HEllo,
Check the foll link
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/9f4a452b-0301-0010-8ca6-ef25a095834a
Regds,
Shashank

Need Clarification On Internal tables in Start Routine

Hi,
I have intenal table some IT_A which deletes the requests which are populated in to it.
Now I need to populate requests into IT_A from another internal table like IT_B which are of different structure.
I have three fields in common in both internal tables like RNR,Timestamp n SID with different field names
I Need Clarification that if i move the contents of the three fields to IT_A from IT_B by spcifying these three fields.Will the internal table IT_A deletes the Requests?
Thanks,
Sriram.

Hi Sriram,
As mentioned IT_A deleted the request loaded into it.
if you move the contents of the three fields to IT_A from IT_B by spcifying the three fields after the deletion step for internal table IT_A takes place then it wont get deleted.
But it would be deleted if the the contents are moved before the deletion step takes place
regards,
mahesh

Need clarification on issue with tablespaces

Hi All,
I needed clarification on this issue with tablespaces.I am following a guideline which says "Presently,The general rule of thumb is to concentrate on tablespaces that are 90% or greater used and have less than 2 GB of free space"
My Scenario:-Now i have tablesace which is 97.23 % and the free space is 10 gb.Please advise me that whats the best next step I can take in this respect?
I am very new to this and just following the guideline,so can you all please explain me some details about this.
Thanks

Well, the guideline says "*and* have less than 2 GB of free space"
Since that tablespace as 10GB of free space, the guideline says that you do not need to concentrate on it. Eh ?
I would be careful with guidelines that are hard-coded in this manner. You need to know the context in which the guideline was set.
Assuming that your database/application doesn't grow suddenly by 1GB or larger (or create temporary segments / objects of 1GB or larger), the "2 GB of free space" might make sense. Then, again, it depends on the extent allocation type. What size are extents getting allocated.
You should check with your organisation's senior DBAs on what happens if you don't concentrate on a tablespace because it is outside the guidelines !

Need clarification on OLAP Cache!!!

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