OLAP Cache filling using Broadcasting

Hi All,
We have two BEx queries which take more than 30 minutes to complete. One is an inventory cube query and other one is a query with a lot of exception aggregation.
In the Statistics, both queries show that around 90% execution time is at OLAP level.
We created broadcasting settings to fill OLAP cache for both the queries and scheduled in background. In RSRCACHE, we can see entries for both queries.
But the execution time still have not improved. They both are taking same time to complete execution.
Now I doubt if OLAP Cache supports non-cumulative key figures and exception aggregation or not. Is this mentioned in any documentations?
Pls let me know your suggestions.
Thanks in advance,
Regards,
Bijesh

hi,
you can carry out following checks:
1) check parameter of global and local cache, general sense the global cache size should be larger than the local cache size you can configure the cache parameters in RSCUSTV14 or simply ask basis do optimise them acc. to system usage
2) also since you you have checked RSRCACHE, try changing few option in properties change read to X(for large amt of data) by default its H
3) try changing cache mode to with swapping instead of default without swapping, in case of several app server choose mode 4
then click on environment->query mass maintainence
see if these works out
regards
laksh

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OLAP-Cache filling and report retrieval from cache

Dear All,
I am expecting good information from you guys in regards to process of OLAP-Cache filling and retrieval process.
Let's say, we have few selectios as below to fill cache.
selection 1:
Calmonth : 201006
Plant : A1 to A3.
OLAP cache is filled with the above selection1.
Selection 2:
Calmonth : 201006
Plant : A4 to A5
OLAP cache is filled with the above selection2.
When I am exeuting a query with the selections as below, how the data will be retrived? Is it from Cache memory or DB?
Selection: Calmonth 201006 and Plant A3 to A4.
Would be really Appreciate If I get some valuable information.
Regards,
KS

Thanks for valuable information.
I have used the mode as "Persistent Cache per Application Server" and " Transparent Table (BLOB)"
What I am realizing here is, If the query selection is different from the cache selection, it is reading it from DB though the requested data is availabe in cache as per the below eg.
Cache Memory:
Selection1: Calmonth : 201006 and Plant : A1 to A2
Selection2: Calmonth : 201006 and Plant : A3 to A4.
Query Selection:
Calmonth : 201006 and Plant : A2 to A3.
Regards,
Kanagaraj.S

How to understand if olap cache is used

Hi,
I am trying to understand if my query uses the olap cache or not.
First I executed the report with specific selections. After that, I executed the report again with the same selections but it took almost same time to bring the report output. There are lots of exception aggregates in my query, so i wonder if olap cache will help me or not.
So, how can I understand if the query uses the olap cache or not ? (i am using RSRT screen, with 'do not use cache' blank)
Thanks
Ozan

Hi
Check in tcode RSRT. Input your query tech name and from the properties tab, you can see if the olap cache is set to be used in the cache mode field.
You can check if the entries you are making in the cache are used, if you, also from RSRT, go to cache monitor->main memory and expand the folder "query directory".
now search for your query tech name.
a folder will appear with your query tech name if the cache mode enabled.
right-click and choose details. here you will see "read accesses" and the number will tell you how many times this entry has been read.
regards
jacob

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

Fill OLAP cache via broadcaster

Hi,
I'm trying to use the broadcaster with distribution type 'Fill OLAP cache' and schedule it using " Including Event Data Changes in Process Chains ". The process chain has been adapted with the 'Event data change' process and scheduled. Process chain runs fine. All was set up according to the link below.
http://help.sap.com/saphelp_nw70/helpdata/EN/a5/359840dfa5a160e10000000a1550b0/frameset.htm
However, when I try to schedule the broadcaster setting, I only get the options of "Execution at Predefined Time" or direct scheduling.
Should I not be able to see "Execution with Data Change in the InfoProvider " as an option? Is there some other setting to be made?
Very grateful for any ideas.
Thanx

Check if you have S_RS_BCS role authorization.
You have to use process type DATACHANGE in the process chain for data load.
Check this http://help.sap.com/saphelp_nw04/Helpdata/EN/ec/0d0e405c538f5ce10000000a155106/content.htm

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...

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

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

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./

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

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

Do Query Views use existing OLAP Cache or create their own

Hi, I'm looking to find out if a Query View will use the Parent Query OLAP Cache or will it create it's own?
I am imagining that it would use the query view, but create additional cache if it drilled down on a free characteristic that wasn't in the original query output. Any comments

If there are any entries in the CACHE which meets the drilldown and filter criteria for the view it will be able to make use of existing Cache.
As you mentioned for any additional drilldowns if there are not entries in the cache it will have to read from DB.

Can storing a live stream using actionscript fail by the cache filling up with overhead?

Hi,
Lately we have been seeing a problem with the archives of live streams we create using FMS. We use FMS for live streaming and concurrently store the stream in a file using ActionScript. We use the following code to record:
var s2 = Stream.get('mp4:' + mp4name);
application.publishedStreamMP4= s2;
application.publishedStreamMP4.record();
application.publishedStreamMP4.play(application.publishedStream.name,-1,-1);
(some lines have been removed that are used for logging, etc).
Sometimes some of these functions fail and return false. In these cases FMS's core log shows that the cache is full:
2013-06-11 11:45:55        13863   (w)2611372      The FLV segment cache is full. -
In investigating this issue I have not yet been able to recreate this exact situation. By lowering the cache to 1MB I have however been able to create a situation where storing a stream can stop because the cache is full. The situation occurs as follows:
* The server is restarted, the cache is empty.
* A live stream is started, which is also recorded.
* Via the Administration API the cache values <bytes> and <bytes_inuse> show to be exactly the same as the <overhead> of the object that relates to the file being saved. The <bytes> and <bytes_inuse> values of the object are 0.
* This continues in the same way untill the cache is full.
* When the limit of the cache is reached the message
2013-06-11 12:07:35        13863   (w)2611372      The FLV segment cache is full. -
is shown in the core log and storing of the file stops. The instance log also show status changes:
2013-06-11 12:07:35        13863   (s)2641173      MP4 recording status for livestream.mp4: Code: NetStream.Record.NoAccess Level: status Details:         -
2013-06-11 12:07:35        13863   (s)2641173      MP4 recording status for livestream.mp4: Code: NetStream.Record.Stop Level: status Details:     -
In the filesystem I can confirm that the last change of the file is on this moment (in this case 12:07). The live stream continues without problems.
I have reproduced this several times. Though I can understand that caches can fill up and this can cause trouble I feel like this situation is a bug in FMS. The cache fills up with overhead, which is apparently reserved untill writing the file ends.
I hope someone here can help out. Has anyone seen a situation like this and is there any remedy for it? Or even a workaround where this overhead in the cache can be released so the cache does not fill up?
We use FMS version 4.5.1.

You can use an XML socket, but the FMS application will need to initiate the connection, as FMS has no support for listening for anything other than RTMP and HTTP requests.
Stream switching can happen on the FMS side. In your FMS application, you'll create a server side stream, and use the Stream.play method for playing other sources (live streams or recorded flv/h.264 files) over that stream. Your subscribers will connect to the server side stream
See the FMS docs for the Stream class and the XMLSocket class.

Warming up the OLAP cache

Hi,
I would like to schedule execution of some queries in order to put the results in the OLAP cache for fast use.
Each user run the query with very restricted selection: one period, one node in the CostCenter hierarchy and one currency type! All the selections are obligatory and for single values.
I created a "super" query with the same characteristics, all in the rows or columns, with not mandatory variables, ...
I scheduled the "super" query and it create an entry in the OLAP cache.
When I now run the production query (other query on the same cube, for one node, one period, one currency) the system doesn't use the OLAP cache, but create a new line in the OLAP cache.
It is impossible to schedule every combination.
Is there a way to worm up the cache with a different Q?
Should the seedling be done with Broadcaster or Reporting Agent (in NW2004s)? I think this should be the same ?!
Any suggestion to fill the cache for my situation?
Thanks, Tom

The OLAP cache is at a query level, so to warm up the cache, you must run the actual query that the users will run, not just a similar or "super" query that is similar.
SDN has some doc on effectively using Global cache which would be good to review.
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/9f4a452b-0301-0010-8ca6-ef25a095834a
The other key thing to understand is how the setting on variable "Can be changed during query navigation" works. If this setting is NOT set on your variables, then in order for a query to access the data in the cache, the query must have been run previously with the exact same variable values, as the varaiable values get saved as part of the cached info.
Selecting the "Can be changed during navigation" variable setting changes the way the system considers the variable - it behaves as a filter. This has some implications with way prompts for variables appear to the user, so there are user impacts. In BEx, a variable is normally presented for input when you first run the query and then whenver you refresh it, but when you change the variable setting to Can be changed..., the variable prompt will be presented teh frist time the query is run, but NOT when a refresh is done, it now behaces as if you added a filter to the query.
So if you change all the variables (or create new ones) used bythe query to Can be changed..., then run your query thru reporting agent or info broadcasting wide open, or with restrictions that encompass all your user's query executions, the subsequent user executions will use the global Olap cache.

OLAP Caching question

Hi
I'm not sure if this is the right forum, but I figured I would ask anyways. Using the broadcaster, I have configured a couple variable settings on a query to fill the OLAP Cache.
Is there a way to update the parameter settings by an api instead of going in manually to each query and updating the parameter values?
For example, say I want to cache only two months worth of data. I set the query settings for Jan and Feb. Now I want to configure to Mar and Apr. Instead of manually opening up the settings and entering and saving I want to do this using code if possible.
The reason why is if I have 100 queries to set this, it would be much easier to run this through code than manually updating the values.
Thanks in advance,
Daniel

check the table RSRPARAMETRIZA, field-content which stores the variant values. You can update the variant values dynamically using ABAP.
This articles shows you how to do that.
http://www.sdn.sap.com/irj/scn/index?rid=/library/uuid/f048c590-31a4-2c10-8599-bd01fabb93d4

OLAP Cache filling using Broadcasting

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