Please help, Discoverer Performance.
I am having problems with report performance in Discoverer. I believe I have set up the Business Area correctly. I am having a problem when adding a drop down menu to a report in that it takes a long time. Is there anything I can do? (It takes about 5 seconds to refresh a report without any drill filters on top, and with 5 drill filters on top it takes about 4 minutes.)
Also, I copied and pasted the sql querry into sql developer from the report, and the report took less than 5 seconds. This tells me there is something set up on the report side that is incorrect. Any suggestions?
Thanks!
1. This is a 10G Plus Olap situation.
2. Yes, the dims are set up linked to the larger fact table.
3. I have tried re-arranging the group items without anything else on the group level. If there is only one group by (on the dropdown) such as state, it is really quick (less than 2 seconds to refresh), even with the Customer Dim (with 7k + names). However, when I put more than one group by on the drill down, everything is exponentially slowed down.
4. This definitely doesn't work.
6. Unfortunately, the table design isnt as simple as I have defined it to be. There are probably 20 measures involved, along with about 30+ parameters. I do have Toad and SQL Developer, and can create a view for each particular group by, because that is faster, but I run into 2 problems.
A. The data is refreshed and broken down to a weekly basis which would create an incredible runtime for the number of views I would need to write
B. This is only one Business area in an end user layer of about 15. This problem spans across the other business areas as well.
7. Taking the sql right out of the report, and crunching the report in developer produces timely results, regardless of what kind of group by statements are included.(although the view sql doesn't include the group by statements)
8. One thing I really don't get: This is a work around I have figured out, but the end users probably won't want to deal with this:
1. I set up the customer name as a parameter (so when the report is refreshed, the end user can select one or more names before refreshing reports)
2. I put all of the other group bys/ drop downs into the report (4 of them).
The result is the report works with lightning speed. The drawbacks are the end user can't scroll through the names as easily and it creates more steps for the end user.
If I can get it to work efficiently by creating a parameter, why can't I have a drop down? It seems that they are pretty much the same thing?
Thanks Russ.
Message was edited by:
user519817
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DATA : w_ebeln LIKE ekko-ebeln,
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Please help me how to improve the performance of this query further.
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PLEASE HELP
select substr(d.name,1,14) "dist",
sum(r.room_net_sq_foot) "nsf",
sum(r.student_station_count) "sta",
sum(distinct(r.cofte)) "fte"
from b_fish_report r,
g_efis_organization d
where substr(r.organization_code,-2,2) = substr(d.code,-2,2) and
d.organization_type = 'CNTY' and
r.room_satisfactory_flag = 'Y' and
substr(d.code,-2,2) between '01' and '72'
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Thanks
Asma.Asma,
I tried your SQL on my tables T1 and T2. Indexes are on C1,C2,C3 and N1,N2,N3. The data in T1 and T2 are shown below with the explain plan (also called EP) listed. You really need to do an explain plan (free TOAD is easiest to do this in) and respond showing your EP results.
By simply changing the optimizer mode to RULE I was able to get it to use indexes on both T1 and T2.
T1 data
C1 C2 C3 N1 N2
001 Y AAA 1 11
002 Y BBB 2 22
003 Y CCC 3 33
111 N DDD 4 44
222 N EEE 5 55
333 Y FFF 6 66
070 Y GGG 7 77
071 N HHH 8 88
072 Y III 9 99
TEST TEST TEST 10 100
T2 data
C1 C2 C3 N1 N2
001 CNTY AAA 1 11
002 CNTY BBB 2 22
003 CNTY CCC 3 33
111 XXX DDD 4 44
222 XXX EEE 5 55
333 CNTY FFF 6 66
070 CNTY GGG 7 77
071 XXX HHH 8 88
072 CNTY III 9 99
TEST TEST TEST 10 100
This is the results when I run the SQL based on this data ...
dist nsf sta fte
AAA 1 11 10
BBB 2 22 20
CCC 3 33 30
FFF 6 66 60
GGG 7 77 70
III 9 99 90
--[SQL 1] : with CHOOSE as the optimizer mode, which is normally the DEFAULT if no hint is specified
select /*+ CHOOSE */
substr(d.c3,1,14) "dist",
sum(r.n1) "nsf",
sum(r.n2) "sta",
sum(distinct(r.n3)) "fte"
from t1 r, t2 d
where substr(r.c1,-2,2) = substr(d.c1,-2,2) and
d.c2 = 'CNTY' and
r.c2 = 'Y' and
substr(d.c1,-2,2) between '01' and '72'
group by d.c3, r.c1
order by d.c3
This is what the EP shows for your SQL (which will probably be the same for you once you do an EP on your actuall sql) ...
SELECT STATEMENT Optimizer=CHOOSE (Cost=4 Card=1 Bytes=37)
SORT (GROUP BY) (Cost=4 Card=1 Bytes=37)
NESTED LOOPS (Cost=2 Card=1 Bytes=37)
TABLE ACCESS (FULL) OF T1 (Cost=1 Card=1 Bytes=12)
TABLE ACCESS (BY INDEX ROWID) OF T2 (Cost=1 Card=1 Bytes=25)
INDEX (RANGE SCAN) OF I_NU_T2_C2 (NON-UNIQUE)
Notice the FULL table scan of T1 which you don't want, and neither C1 index is getting used (I've explained why below).
--[SQL 2] : only changed the hint to RULE ...
select /*+ RULE */
substr(d.c3,1,14) "dist",
sum(r.n1) "nsf",
sum(r.n2) "sta",
sum(distinct(r.n3)) "fte"
from t1 r, t2 d
where substr(r.c1,-2,2) = substr(d.c1,-2,2) and
d.c2 = 'CNTY' and
r.c2 = 'Y' and
substr(d.c1,-2,2) between '01' and '72'
group by d.c3, r.c1
order by d.c3
SELECT STATEMENT Optimizer=HINT: RULE
SORT (GROUP BY)
NESTED LOOPS
TABLE ACCESS (BY INDEX ROWID) OF T2
INDEX (RANGE SCAN) OF I_NU_T2_C2 (NON-UNIQUE)
TABLE ACCESS (BY INDEX ROWID) OF T1
INDEX (RANGE SCAN) OF I_NU_T1_C2 (NON-UNIQUE)
Though the C2 index is getting used (your r.c2 = 'Y' part in the where clause) the main problem your having here is the JOIN column (C1 in both tables) is not getting used. So the join you have ...
where substr(r.c1,-2,2) = substr(d.c1,-2,2)
isn't using an index and you want it too. There are 2 solutions to correct this..
Solution #1
The first is to make a function-based index for data. Since your doing SUBSTR on C1 that C1 index does not contain that partial information so it will not use it. Below is the syntax to make a function based index for this partial data ...
CREATE INDEX I_NU_T1_C1_SUBSTR ON T1 (SUBSTR(C1,-2,2));
CREATE INDEX I_NU_T2_C1_SUBSTR ON T2 (SUBSTR(C1,-2,2));
or also this way if it's still not using the above indexes ...
CREATE INDEX I_NU_T1_C1_SUBSTR ON T1 (SUBSTR(C1,-2,2),C1);
CREATE INDEX I_NU_T2_C1_SUBSTR ON T2 (SUBSTR(C1,-2,2),C1);
Solution #2
The second solution is to make another column in both table and place this 2 digit information in it, and then index this new column. That way the join will look like ...
where r.c_new_column = d.c_new_column
and
r.c_new_column between '01' and '72'
also with this new column the BETWEEN clause at the end you will not need the substring as well. Also remember BETWEEN on character values is different than numbers.
Final Notes
I just tried creating the functional index and I can't get it to be used it for some reason (I might not have the right amount of data), but I really think that is your best option here. As long as it uses the functional index you won't have to change your code. You might want to try using INDEX() in the hint to get it to be used, but hopefully it will use it right away. Try all 4 types of optimizer modes (CHOOSE, RULE, ALL_ROWS, FIRST_ROWS) in your primary hints to see if it will use the new function-based index.
You really do need to get explain plan going. Even if you make these functional indexes you won't know if its going to be using them until you look at the EP results. You can do EP manually (the SQL of how to produce the results is in OTN, though I find free TOAD is by far the easiest) and you will still need to have run the utlxplan.sql script. Oracle I do think has some GUI tools, maybe in OEM, that have explain plan built in as well.
I hope this helps ya,
Tyler D. -
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At the first start of Sun Studio a message appear:
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dbx Debugger UI - The module named com.sun.tools.swdev.toolscommon was needed and not found.
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ATD Performance Analyzer Actions - The module named com.sun.tools.swdev.toolscommon was needed and not found.
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I've added to my .bash_profile this lines:
PATH=/opt/sun/sunstudio12/bin:$PATH
export PATH
PATH=/opt/sun/sunstudio12/man/:$PATH
export PATH
LD_LIBRARY_PATH=/opt/sun/sunstudio12/prod/lib
export LD_LIBRARY_PATH
but unfortunately this don't solve the problem....
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[mlx@localhost ~]$ `uname -p`
bash: Intel(R): command not foundIf I type: --userdir won't work as you can see:
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Warning - could not install some modules:
ATD Performance Analyzer Actions - The module named com.sun.forte.st.mpmt/1 was needed and not found.
ATD Performance Analyzer Actions - The module named com.sun.tools.swdev.toolscommon was needed and not found.
dbx Debugger UI - The module named com.sun.tools.swdev.toolscommon was needed and not found.
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uid=500(mlx) gid=500(mlx) gruppi=500(mlx)so I've created a sym link:
cd /usr/bin
ln -s /bin/id ./idbut when I start Sun Studio 12 I get again the error on the module.
So I've tryed to reinstall everything (yes, also OS) but it (partially) solves only the problem installing with batch_installer. Infact now I can use batch_installer but at the end of installation it say:
[root@localhost tmp]# ./batch_installer --accept-sla
Installation failed: cleanup successful.Anyway SunStudio 12 still works, but the main problem about the module of performance analyzer is still here...
how can I solve this? Please help!
Edited by: MLX82 on Feb 4, 2008 3:19 PM -
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My kids have iPad Airs. One of them has a serious slow down in performance after upgrading to iOS 7.1. The others work fine. It is so slow that it is unusable. When you type a single character, it takes several seconds to show up on the screen. I'm rebooted and did a reset in Settings. Any other ideas? Please help.
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create user &username identified by &password;
grant connect, resource to &&username;
grant alter any materialized view to &&username;
grant analyze any, create any materialized view to &&username;
grant create procedure, create role, create sequence to &&username;
grant create session, create table, create view to &&username;
grant drop any materialized view, execute any procedure to &&username;
grant global query rewrite to &&username;
grant select any table, unlimited tablespace to &&username;
grant execute on sys.dbms_job to &&username;
grant select on sys.v_$parameter to &&username;
Please go to my downloads page at: http://learndiscoverer.com/downloads/downloads.htm where you will find lots of articles about installing an EUL and creating a business area. If you are new to Discoverer Admin I would point you at TwoHourEUL.zip which will teach you through a lot about creating a business area correctly.
I hope this helps
Best wishes
Michael Armstrong-Smith
URL: http://learndiscoverer.com
Blog: http://learndiscoverer.blogspot.com -
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