Cube Load Times

Hi there, We have one BSO cube implemented on Essbase 7.1.2 and we load data from an SQL server source every night. My question is to do with the time taken to load/calculate the cube. It started off at around 20mins however in the space of a few months this time has risen a LOT. Its now taking upto 2.5hours to complete the load/calculation process. If we re-structure the cube, the next days load takes around 1hour. My question was basically, can anyone reccomend any tips/tricks to optimise the load process? One thing we have noticed is that the data compression on the cube is set to RLE. IS this the right one or should we be using one of the others? Any help appreciated! <img src="i/expressions/beer.gif" border="0"> Brian

With the assumptions that (a) you perform a full calc of the database, and (b) the full calc itself isn't an exceptionally long process, you can typically get a much better overall performance gain by doing the following: 1) Export the input level data (level 0 if you have agg missing turned on). 2) Clear the database 3) Load data from your Essbase export 4) Load data from your SQL source 5) Run your full calc/calc all The reason you could get an overall performance gain is two-fold: 1) The RLE compression tends to cause a lot of fragmentation within the page files as blocks are written and re-written. 2) The calc engine tends to run faster when it doesn't have to read the upper level blocks in before calculating them. Both of the above are simplified explanations, and results vary greatly based on the outline/hierarchies and the calc required. One thing to note however, is that if you run any type of input scrubbing/modification script (e.g. allocation, elimination, etc.), the optimum sequence can be quite different than the above (I won't go into the hows and whys here). Now on to the other ways to optimize your load. In the Database Administrators Guide (DBAG), there is a good section on ways to optimize a file for optimum loading. Basically, the closer the order of the members appearing in your load file matches the order they appear in the outline, the better. For instance, if the columns in the file are dense, and the rows are sorted in the same order as the sparse dimensions, you load MUCH faster than if you do the opposite. This can have a big impact on the fragmentation that occurs during a load, enough so that if you can be pretty sure that the sort for your SQL export is optimum for loading, the above approach (Export/Clear/Load/Calc) won't get you any real benefit -- at least from the fragmentation aspect. Of course, the outline itself can be less than optimum, so any fixes you address should start with the outline, then move to the SQL file layout, then the load process. The caution here is to be sure that changes you make to align the outline with your dataload don't adversely affect your calc and retrieval performace too much. Most of this is covered in the DBAG, in greater detail, just not layed out in an order that can be easily followed for your needs. So if you need further details on any of the above, start there.

Similar Messages

ODS to CUBE loading - taking too much time

Hi Experts,
I am loading data from R/3(4.7) to BW (3.5).
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I have a selection criteria in Infopackage while loading from standard Datasource to ODS.
It takes me 20 mins to load 300K records.
But, from ODS to Infocube ( update method: Data Target Only), it is taking 8 hours.
The data packet size in Infopackage is 20,000 ( same for ODS and Infocube).
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I tried scheduling it as a background job too.
I do not have any selection criteria in the infopackage from ODS to Cube.
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Hi,
To improve the data load performance
1. If they are full loads then try to see if you make them delta loads.
2. Check if there are complex routines/transformations being performed in any layer. In that case see if you can optimize those codes with the help of an abaper.
3. Ensure that you are following the standard procedures in the chain like deleting Indices/secondary Indices before loading etc.
4. Check whether the system processes are free when this load is running
5. try making the load as parallel as possible if the load is happening serially. Remove PSA if not needed.
6. When the load is not getiing processed due to huge volume of data, or more number of records per data packet, Please try the below option.
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Ensure the data packet sizing and also the number range buffering, PSA Partition size, upload sequence i.e, always load master data first, perform change run and then transaction data loads.
Check this doc on BW data load perfomance optimization
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/1955ba90-0201-0010-d3aa-8b2a4ef6bbb2
BI Performance Tuning
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BI 7 real-time cube load behavior changed after transport

Dears,
After I transported real-time cube from DEV to QA system, I found that all the real-time cube load behavior changed from 'can be loaded, planning not allowed' to 'can be planned, load not allowed'. What happened? Or I'm enpackaging this type cube with wrong step? Any suggestions are appreciated.
Best regards,
Gerald

Hi,
I think note 984803 can be usefull for you.
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Dears
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Hi Gerald,
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Simulate load times

Hi all,
Anyone here knows if we can simulate load time in BW?
Example, i have a DSO that goes to a Cube for reporting.
I would like to simulate how long 100,000 records will take to get from ECC to the Cube.
I might later want to test how long 250,00 records will take.
RSA3 is not useful as it can only test how fast the extractor will take.
Is such as thing possible?

Hi Ganesan,
1) for DSO to Cube Loading: You have to create a DTP.
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2) for Loading from ECC to BI : You have to create Info package.
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cheers.

Comparing load times w/ and w/o BIA

We are looking at the pros/cons of BIA for implementation. Does anyone have data to show a comparison between loads, loads with compression, vs BIA Index time?

Haven't seen numbers comparing load times. Loads to your cubes and compression continue whether you have BIA or not. Rollup time would be eliminated as you would no longer have the need to have aggregates. No aggregates should also reduce Change Run time, perhaps a lot, or only a little, depending on whether you have large aggregates with Nav Attrs in them. All of that is offset to some degree by the time to update the BIA.
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How to tune data loading time in BSO using 14 rules files ?

Hello there,
I'm using Hyperion-Essbase-Admin-Services v11.1.1.2 and the BSO Option.
In a nightly process using MAXL i load new data into one Essbase-cube.
In this nightly update process 14 account-members are updated by running 14 rules files one after another.
These rules files connect 14 times by sql-connection to the same oracle database and the same table.
I use this procedure because i cannot load 2 or more data fields using one rules file.
It takes a long time to load up 14 accounts one after other.
Now my Question: How can I minimise this data loading time ?
This is what I found on Oracle Homepage:
What's New
Oracle Essbase V.11.1.1 Release Highlights
Parallel SQL Data Loads- Supports up to 8 rules files via temporary load buffers.
In an Older Thread John said:
As it is version 11 why not use parallel sql loading, you can specify up to 8 load rules to load data in parallel.
Example:
import database AsoSamp.Sample data
connect as TBC identified by 'password'
using multiple rules_file 'rule1','rule2'
to load_buffer_block starting with buffer_id 100
on error write to "error.txt";
But this is for ASO Option only.
Can I use it in my MAXL also for BSO ?? Is there a sample ?
What else is possible to tune up nightly update time ??
Thanks in advance for every tip,
Zeljko

Thanks a lot for your support. I’m just a little confused.
I will use an example to illustrate my problem a bit more clearly.
This is the basic table, in my case a view, which is queried by all 14 rules files:
column1 --- column2 --- column3 --- column4 --- ... ---column n
dim 1 --- dim 2 --- dim 3 --- data1 --- data2 --- data3 --- ... --- data 14
Region -- ID --- Product --- sales --- cogs ---- discounts --- ... --- amount
West --- D1 --- Coffee --- 11001 --- 1,322 --- 10789 --- ... --- 548
West --- D2 --- Tea10 --- 12011 --- 1,325 --- 10548 --- ... --- 589
West --- S1 --- Tea10 --- 14115 --- 1,699 --- 10145 --- ... --- 852
West --- C3 --- Tea10 --- 21053 --- 1,588 --- 10998 --- ... --- 981
East ---- S2 --- Coffee --- 15563 --- 1,458 --- 10991 --- ... --- 876
East ---- D1 --- Tea10 --- 15894 --- 1,664 --- 11615 --- ... --- 156
East ---- D3 --- Coffee --- 19689 --- 1,989 --- 15615 --- ... --- 986
East ---- C1 --- Coffee --- 18897 --- 1,988 --- 11898 --- ... --- 256
East ---- C3 --- Tea10 --- 11699 --- 1,328 --- 12156 --- ... --- 9896
Following 3 out of 14 (load-) rules files to load the data columns into the cube:
Rules File1:
dim 1 --- dim 2 --- dim 3 --- sales --- ignore --- ignore --- ... --- ignore
Rules File2:
dim 1 --- dim 2 --- dim 3 --- ignore --- cogs --- ignore --- ... --- ignore
Rules File14:
dim 1 --- dim 2 --- dim 3 --- ignore --- ignore --- ignore --- ... --- amount
Is the upper table design what GlennS mentioned as a "Data" column concept which only allows a single numeric data value ?
In this case I cant tag two or more columns as “Data fields”. I just can tag one column as “Data field”. Other data fields I have to tag as “ignore fields during data load”. Otherwise, when I validate the rules file, an Error occurs “only one field can contain the Data Field attribute”.
Or may I skip this error massage and just try to tag all 14 fields as “Data fields” and “load data” ?
Please advise.
Am I right that the other way is to reconstruct the table/view (and the rules files) like follows to load all of the data in one pass:
dim 0 --- dim 1 --- dim 2 --- dim 3 --- data
Account --- Region -- ID --- Product --- data
sales --- West --- D1 --- Coffee --- 11001
sales --- West --- D2 --- Tea10 --- 12011
sales --- West --- S1 --- Tea10 --- 14115
sales --- West --- C3 --- Tea10 --- 21053
sales --- East ---- S2 --- Coffee --- 15563
sales --- East ---- D1 --- Tea10 --- 15894
sales --- East ---- D3 --- Coffee --- 19689
sales --- East ---- C1 --- Coffee --- 18897
sales --- East ---- C3 --- Tea10 --- 11699
cogs --- West --- D1 --- Coffee --- 1,322
cogs --- West --- D2 --- Tea10 --- 1,325
cogs --- West --- S1 --- Tea10 --- 1,699
cogs --- West --- C3 --- Tea10 --- 1,588
cogs --- East ---- S2 --- Coffee --- 1,458
cogs --- East ---- D1 --- Tea10 --- 1,664
cogs --- East ---- D3 --- Coffee --- 1,989
cogs --- East ---- C1 --- Coffee --- 1,988
cogs --- East ---- C3 --- Tea10 --- 1,328
discounts --- West --- D1 --- Coffee --- 10789
discounts --- West --- D2 --- Tea10 --- 10548
discounts --- West --- S1 --- Tea10 --- 10145
discounts --- West --- C3 --- Tea10 --- 10998
discounts --- East ---- S2 --- Coffee --- 10991
discounts --- East ---- D1 --- Tea10 --- 11615
discounts --- East ---- D3 --- Coffee --- 15615
discounts --- East ---- C1 --- Coffee --- 11898
discounts --- East ---- C3 --- Tea10 --- 12156
amount --- West --- D1 --- Coffee --- 548
amount --- West --- D2 --- Tea10 --- 589
amount --- West --- S1 --- Tea10 --- 852
amount --- West --- C3 --- Tea10 --- 981
amount --- East ---- S2 --- Coffee --- 876
amount --- East ---- D1 --- Tea10 --- 156
amount --- East ---- D3 --- Coffee --- 986
amount --- East ---- C1 --- Coffee --- 256
amount --- East ---- C3 --- Tea10 --- 9896
And the third way is to adjust the essbase.cfg parameters DLTHREADSPREPARE and DLTHREADSWRITE (and DLSINGLETHREADPERSTAGE)
I just want to be sure that I understand your suggestions.
Many thanks for awesome help,
Zeljko

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Hi All,
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Thanks,
SatyaB

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[html]
[head]
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[script]
[head]
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Dear All,
Can i get somehow in query what was the last load time? I mean if query is running on InfoCube and i want to see that on that InfoCube when last data was loaded and this info i want to see in Query.
Regards,
Sohil Shah.

Hi,
Do you want to know only the status of the data of that query or in general about all the cubes last load time.
If you want to know the status of the data of that query, check the below link. You can get it from the constants of query.
http://help.sap.com/saphelp_nw70/helpdata/EN/06/ad1578a5a9487da87495c1960f5a2d/content.htm
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Hope this gives you an idea.
Regards
akhan

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Hi All,
(on BSO)
I read some where like if more index files exists the load time will be increase to search the rite combination to load data value. Is that correct ?
I have restrcutred(level 0) the dense members and done the calculations So my index files become 3 after i have run general load on that database it took 1hr.
I have done sparse restructure( all data) and noticed Index files become 2 and ran general load on that database it took 30 mins time.
Let me know whether m correct or not.
Sorry,m not good in explaning the things. :)
Regards,
Prabhas
Edited by: Prabhas on Jun 13, 2012 9:21 PM

You say you first load into a test cube, then export and use that to load into prod. Is the dimension order and dense/sparse configuration the same? Test cube is a copy of prod cube.so everything must be same.
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Incremental Cube Load Error: job slave process terminated

Hi,
For performance reasons, we switched to Incremental Cube Loading i.e. only those partitions are autosolved whose data is made available.
Some times, the background submitted job terminates and the reason given in dba_scheduler_job_run_details is:
REASON="Job slave process was terminated"
There so no definits occurance pattren for this error.
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thank you,

Hi,
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I just updated my RAM and I keep getting a crash report. I have a 21.5 Inch mid 2010 imac. I also am experiencing slow load times and when I try to open Final Cut it says that quartz extreme is not compatible and that I have no VRAM even though I do.

I just updated my RAM (replaced the two 2 gig cards with two Corsair 8 gig cards) and I keep getting a crash report. I have a 21.5 Inch mid 2010 imac. I also am experiencing slow load times with Photoshop and when I try to open Final Cut it says that quartz extreme is not compatible and that I have no VRAM even though I do.
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Interval Since Last Panic Report: 5426204 sec
Panics Since Last Report:          2
Anonymous UUID:                    2DD57DDB-BB42-5614-395A-CA6225BDAFD9
Wed Mar 20 11:36:53 2013
panic(cpu 0 caller 0xffffff801aa43d8e): "a freed zone element has been modified in zone: maps"@/SourceCache/xnu/xnu-2050.18.24/osfmk/kern/zalloc.c:219
Backtrace (CPU 0), Frame : Return Address
0xffffff81eb0eb950 : 0xffffff801aa1d626
0xffffff81eb0eb9c0 : 0xffffff801aa43d8e
0xffffff81eb0eba00 : 0xffffff801aa435d2
0xffffff81eb0ebae0 : 0xffffff801aa663f7
0xffffff81eb0ebb20 : 0xffffff801aa67398
0xffffff81eb0ebc70 : 0xffffff801aa6887c
0xffffff81eb0ebd20 : 0xffffff801ad5b8fe
0xffffff81eb0ebf50 : 0xffffff801ade182a
0xffffff81eb0ebfb0 : 0xffffff801aaced33
BSD process name corresponding to current thread: launchd
Mac OS version:
Not yet set
Kernel version:
Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64
Kernel UUID: 69A5853F-375A-3EF4-9247-478FD0247333
Kernel slide:     0x000000001a800000
Kernel text base: 0xffffff801aa00000
System model name: iMac11,2 (Mac-F2238AC8)
System uptime in nanoseconds: 1070542822
last loaded kext at 707348380: com.apple.driver.AppleIRController    320.15 (addr 0xffffff7f9c53e000, size 28672)
loaded kexts:
at.obdev.nke.LittleSnitch    3908
com.apple.driver.AppleIRController    320.15
com.apple.driver.AppleUSBCardReader    3.1.0
com.apple.driver.AppleFileSystemDriver    3.0.1
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless    1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib    1.0.0d1
com.apple.BootCache    34
com.apple.iokit.SCSITaskUserClient    3.5.1
com.apple.driver.XsanFilter    404
com.apple.iokit.IOAHCIBlockStorage    2.2.2
com.apple.driver.AppleUSBHub    5.2.5
com.apple.driver.AppleFWOHCI    4.9.6
com.apple.driver.AirPort.Atheros40    600.70.23
com.apple.driver.AppleUSBEHCI    5.4.0
com.apple.driver.AppleAHCIPort    2.4.1
com.apple.iokit.AppleBCM5701Ethernet    3.2.5b3
com.apple.driver.AppleUSBUHCI    5.2.5
com.apple.driver.AppleEFINVRAM    1.6.1
com.apple.driver.AppleACPIButtons    1.6
com.apple.driver.AppleRTC    1.5
com.apple.driver.AppleHPET    1.7
com.apple.driver.AppleSMBIOS    1.9
com.apple.driver.AppleACPIEC    1.6
com.apple.driver.AppleAPIC    1.6
com.apple.driver.AppleIntelCPUPowerManagementClient    196.0.0
com.apple.nke.applicationfirewall    4.0.39
com.apple.security.quarantine    2
com.apple.driver.AppleIntelCPUPowerManagement    196.0.0
com.apple.iokit.IOUSBHIDDriver    5.2.5
com.apple.iokit.IOSCSIBlockCommandsDevice    3.5.1
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com.apple.driver.AppleUSBMergeNub    5.2.5
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com.apple.iokit.IOSCSIMultimediaCommandsDevice    3.5.1
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Model: iMac11,2, BootROM IM112.0057.B00, 2 processors, Intel Core i3, 3.2 GHz, 16 GB, SMC 1.64f5
Graphics: ATI Radeon HD 5670, ATI Radeon HD 5670, PCIe, 512 MB
Memory Module: BANK 0/DIMM1, 8 GB, DDR3, 1333 MHz, 0x029E, 0x434D5341384758334D314131333333433920
Memory Module: BANK 1/DIMM1, 8 GB, DDR3, 1333 MHz, 0x029E, 0x434D5341384758334D314131333333433920
AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x8F), Atheros 9280: 4.0.70.23-P2P
Bluetooth: Version 4.0.9f33 10885, 2 service, 18 devices, 0 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: ST31000528AS, 1 TB
Serial ATA Device: HL-DT-STDVDRW GA32N
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd120000 / 4
USB Device: Built-in iSight, apple_vendor_id, 0x8502, 0xfd110000 / 3
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 4
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8215, 0xfa111000 / 6
USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfa120000 / 3

There have been a few reports on here where Corsair RAM seems to have caused users a lot of grief with crashes.
The recommendation on here, mostly, is to only buy RAM from macsales.com or crucial.com as they guarantee their modules will work and offer a no quibble lifetime guarantee.
I'd put the original RAM back in, return the Corsair chips for a refund and re-order from one of those two companies.
http://eshop.macsales.com/shop/apple/memory/iMac
http://www.crucial.com/

Can a BIG form be served up one page at a time to avoid long load time?

Tricks I have read for optimizing the load time of large forms are not helping. Linearization causes the first page to render quickly, but you can't interact with the fields until the whole form finishes loading -- no help there. Is there a way to break the form into pages (without creating entirely separate forms) so the user can fill out a page, hit a Next Page button, fill out that page, etc.? Understood that this is an old school idea, but until Reader can download a 1+ MB form in less time than it takes an average user to get ticked off, old school might do the trick.
Alternatively, is there a way to construct a form so you can start interacting with it without having to wait for it all to load? This question comes from the (uninformed) assumption that maybe there are forward references that can't be satisfied until all the bits have come over the wire. If that's right, can a multipage form be architected so as to avoid this problem?

No that technology does not exist yet. There are form level events that need to have the entire document there before they can fire. Also you would have to keep track of where you are so that would mean some sort of session information for each user.

Cube Load Times

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