Hidden parameters issue.

Hi
Our reporting developers/management started to complain about their reports running slow after upgrade to 11.1.0.7. Not only is the upgrade teh only change, but they are moving their reports from a single standalone instance to a rac instance. This is for saving costs and get rid of the stand alone database.
The users started complaining about rac and 11g. When we did further investigation we found that the user who runs the report has a logon trigger defined like this
if user = 'REP_USER' then
execute immediate 'alter session set "_b_tree_bitmap_plans" = true';
execute immediate 'alter session set "_fast_full_scan_enabled" = true';
execute immediate 'alter session set "_optimizer_cost_based_transformation"
= linear';
execute immediate 'alter session set "_sort_elimination_cost_ratio" = 0';
execute immediate 'alter session set optimizer_features_enable = "10.2.0.4"'
The default value for b_tree_bitmap_plans" is false and fast_full_scan_enabled is false too.
But what made most difference is with _fast_full_scan_enabled. I set it back to false after logging in as 'REP_USER' and the reports start running better. The other parameters that they set in my opinion dont matter (I mean you can leave them as is is to their default values is probably the best). For some reason, they got this from a DBA who insisted that these should be set in 10g and it would improve performance.
I saw a few Metalink notes which explicity mention about "_fast_full_scan_enabled" and they also mention that it should be set to false especially in a rac instance.
My question is why is it important to set this to false especially in a rac instance (eventhough I agree that these should not be (_ parameters) set at all unless we know what we are doing exacctly).
When I was playing around with this parameter at my session level, I noticed that this parameter does not make much difference in the performance of the report in a non-rac instance and makes a huge difference in a rac instance.
Also, can anyone provide me sources where I can read about these init.ora parameters (I dont want to see a listing of init.ora parameters with _ in them. I have seen some web sites already have them :) ).
Thank you
MSK

btree_bitmap_plans" = true
I think this will tend to choose bitmap plan over btree like bitmap join operation etc.
_fast_full_scan_enabled = true
FFS for index but this oracle decide based on cost and if it find every column in your query in that index
_optimizer_cost_based_transformation
Costing for some complex function like view merge etc. I think this is by default true from 10g onward
alter session set optimizer_features_enable = "10.2.0.4"
calculate costing like 10.2.0,4.
But main question is what is the impact of removing all this and running your queries. ? If it run slow show us plan and tkprof. It might be set to avoid some bugs but need to identify that

Similar Messages

Hidden parameters appears after Oracle 11gR2 upgrade

Platform: HP-UX B.11.31 U ia64
Upgrading from: Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
Upgrading to : Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
Issue : There are around 130 hidden parameter appear after Oracle 11gR2 upgrade.
Before upgrade I have commented the hidden parameters on the PFILE. PFILE only to start the database for the Oracle 11gR2 upgrade.
Before upgrade, checking the hidden parameter:
SQL> SELECT name,description from SYS.V$PARAMETER WHERE name LIKE '\_%' ESCAPE '\';
optimizerextended_cursor_sharing_rel
optimizer extended cursor sharing for relational operators
allowlevel_without_connect_by
allow level without connect by
I am using client parameter file ( PFILE ) commented the hidden parameters highlighted above.
However after successful upgrade to 11gR2, creating SPFILE from the PFILE ( commented the hidden parameters) now i am getting 132 hidden parameters.
SQL> select count(1) from sys.V$PARAMETER where name like '\_%' escape '\';
COUNT(1)
132
SQL> select name from sys.V$PARAMETER where name like '\_%' escape '\';
name
aggregationoptimization_settings
alwaysanti_join
alwayssemi_join
andpruning_enabled
btree_bitmap_plans
bloomfilter_enabled
bloomfolding_enabled
bloompruning_enabled
complexview_merging
compressioncompatibility
connectby_use_union_all
convertset_to_join
costequality_semi_join
cputo_io
dimensionskip_null
eliminatecommon_subexpr
enabletype_dep_selectivity
fastfull_scan_enabled
firstk_rows_dynamic_proration
gbyhash_aggregation_enabled
generalizedpruning_enabled
globalindexpnum_filter_enabled
gsanti_semi_join_allowed
improvedouterjoin_card
improvedrow_length_enabled
indexjoin_enabled
ksbrestart_policy_times
leftnested_loops_random
localcommunication_costing_enabled
minimalstats_aggregation
mmvquery_rewrite_enabled
newinitial_join_orders
newsort_cost_estimate
nljbatching_enabled
optimadjust_for_part_skews
optimenhance_nnull_detection
optimnew_default_join_sel
optimpeek_user_binds
optimizeradaptive_cursor_sharing
optimizerbetter_inlist_costing
optimizercbqt_no_size_restriction
optimizercoalesce_subqueries
optimizercomplex_pred_selectivity
optimizercompute_index_stats
optimizerconnect_by_combine_sw
optimizerconnect_by_cost_based
optimizerconnect_by_elim_dups
optimizercorrect_sq_selectivity
optimizercost_based_transformation
optimizercost_hjsmj_multimatch
optimizercost_model
optimizerdim_subq_join_sel
optimizerdistinct_agg_transform
optimizerdistinct_elimination
optimizerdistinct_placement
optimizereliminate_filtering_join
optimizerenable_density_improvements
optimizerenable_extended_stats
optimizerenable_table_lookup_by_nl
optimizerenhanced_filter_push
optimizerextend_jppd_view_types
optimizerextended_cursor_sharing
optimizerextended_cursor_sharing_rel
optimizerextended_stats_usage_control
optimizerfalse_filter_pred_pullup
optimizerfast_access_pred_analysis
optimizerfast_pred_transitivity
optimizerfilter_pred_pullup
optimizerfkr_index_cost_bias
optimizerfull_outer_join_to_outer
optimizergroup_by_placement
optimizerimprove_selectivity
optimizerinterleave_jppd
optimizerjoin_elimination_enabled
optimizerjoin_factorization
optimizerjoin_order_control
optimizerjoin_sel_sanity_check
optimizermax_permutations
optimizermode_force
optimizermulti_level_push_pred
optimizernative_full_outer_join
optimizernew_join_card_computation
optimizernull_aware_antijoin
optimizeror_expansion
optimizerorder_by_elimination_enabled
optimizerouter_join_to_inner
optimizerouter_to_anti_enabled
optimizerpush_down_distinct
optimizerpush_pred_cost_based
optimizerrownum_bind_default
optimizerrownum_pred_based_fkr
optimizerskip_scan_enabled
optimizersortmerge_join_inequality
optimizersqu_bottomup
optimizerstar_tran_in_with_clause
optimizersystem_stats_usage
optimizertable_expansion
optimizertransitivity_retain
optimizertry_st_before_jppd
optimizerundo_cost_change
optimizerunnest_corr_set_subq
optimizerunnest_disjunctive_subq
optimizeruse_cbqt_star_transformation
optimizeruse_feedback
orexpand_nvl_predicate
orderednested_loop
parallelbroadcast_enabled
partitionview_enabled
pivotimplementation_method
prerewrite_push_pred
predmove_around
pushjoin_predicate
pushjoin_union_view
pushjoin_union_view2
pxminus_intersect
pxpartition_scan_enabled
pxpwg_enabled
pxual_serial_input
queryrewrite_setopgrw_enable
removeaggr_subquery
replacevirtual_columns
resourcemanager_plan
rightouter_hash_enable
selfjoinmv_duplicates
sqlmodel_unfold_forloops
sqltunecategory_parsed
subquerypruning_enabled
subquerypruning_mv_enabled
tablescan_cost_plus_one
unionrewrite_for_gs
unnestsubquery
usecolumn_stats_for_function

I just came across a similar case: 1 (just one) of our (RAC-) databases has 130-something underscore-parameters set to non-default values.
version is still 11.1.0.7 (e.g. not 11gR2).
All of those hidden parameters seem to be CBO related (list on request).
Weird is: Only one of our (very similar, supposedly same-config) databases have these hidden parameters set.
Colleagues justly wonder: Who, When, What has caused these parameters to be expliclty set for this one system?
Note: we do not have the complete history of this system documented (systems have been managed by 3 different parties already).
It is quite possible they came in with some patch or upgrade (catupgr?) somewhere between 11.1.0.1 and 11.1.0.7, but a confirmation would be nice.
Information welcome.
System info:
Linux hostname 2.6.18-164.9.1.el5 #1 SMP Wed Dec 9 03:27:37 EST 2009 x86_64 x86_64 x86_64 GNU/Linux
Versions
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
PL/SQL Release 11.1.0.7.0 - Production
CORE 11.1.0.7.0 Production
TNS for Linux: Version 11.1.0.7.0 - Production
NLSRTL Version 11.1.0.7.0 - Production
5 rows selected.

Retriving only hidden parameters from request.getParameter

Hi,
I want to retrive only the hidden parameters from previous JSP page into current JSP page. The problem here is that my hidden parameters in privious page are dynamically generated (parameter names are decided based on values retrived from the database) and I cannot retrive them using "request.getParameter(<parametername>)"
Can I find the parameter type (i.e. text box, text area, checkbox, radio or hidden) from the request.getParameter() or request.getParameterNames() methods? or is there any other way to find it.
Thanks in advance for any help

You can use the getParameterNames() or getParameterMap() methods from javax.servlet.ServletRequest to get all the parameters in the request. Even if they're dynamically generated, and you don't know the names in advance, these methods will ferret them out.
getParameterMap() returns name String, values String [] pairs, so you'll have to work with String arrays to get the input out. It's got to be that way to accomodate checkboxes and other HTML form elements that can send more than one value for a given name.
I prefer getParameterMap, because I don't like using Enumerations as much. - MOD

How do send along hidden parameters from a form action method

Hi,
I have a JSP that displays an HTML form with several input types such as cehck boxes, radio buttons, text field and read only text fields. The read only fields are populated from a database. There are also a few hidden parameters that come in from the requesting JSP.
Now, when I have entered values in the input fields and click on SUBMIT, I want the action to lead to another jsp which will validate the entries and also want the hidden parameters in the html page sent and also want the read only values sent to the validating JSP ....how do I accomplish this ?
Please help !
mahesh

Hmm...I did exactly that in my target jsp..where I used request.getParameter("MODE") where MODE is the key that I had passed into the html using an earlier jsp:forward command....something like "inputform.jsp?&MODE=ADD.....etc.
but my request.getParameter("MODE") returned null.
When you say properly formatted within the form and /form tags, I wonder if you could tell me what I need to do to format hidden parameters that have been passed along from an earlier request ?
Thank you very much,
Mahesh

Dynamic Regions and parameters - issue

Jdev 11.1.1.6
I have a main page that contains a dynamic region. I want to pass parameters to the region.
Note that I have successfully created parameters for a NORMAL region inside a "parent" form. With a normal "child" region in a "parent",
1. Open the "child" taskflow, click on the whitepace, go to overview, then paraemeters and define a parameter name and value, ex: InputParam and #{pageFlowScope.InputParam}.
2. Open the "parent" form, click on the region, go to bindings, and edit the region. You see the parameter you specified, InputParam and you can enter a value. This value will come from the parent.
3. Set refresh to if needed.
However,
With a dynamic region containing more than one "child" taskflow, I am getting an error. I do everything the same above.
However, when I have the taskflow selected on the bindings tab of the parent form, and click on the structure window, parameter node, The ID text field is surrounded by orange, and a message displays that the reference to "InputParam" is not found.
How are the name or id values specified for a dynamic region? How does one map a parameter from the parent to the "child"? Do you need to put this into a bean?
Thanks,
Stuart

1) Parent A tasflow contains Child B taskflow.
2) Child B expects a parameter called 'inputParameterChild'
3) This will be defined inside the child B taskflow with 'java.lang.String' and value as '#{pageFlowScope.inputParam}'
4) When you click the child B taskflow in parent A taskflow you will see the parameter expected by child B as 'inputParameterChild'
5) Now you can pass the value as '#{pageFlowScope.inputParam}' , here you should have the inputParam set in the bean or in the parent taskflow as explained in step 2 and 3
are you still facing the issue?

Select list and hidden display issue

Hi all,
I am using a dynamic value select list, which when a button is pressed sets the value of a hidden display item. The next page then uses the hidden display item as part of an SQL query.
It strangely sometimes works and sometimes doesn't - it often struggles with the values in the select list which are over 30 characters.
Does anybody have any idea what's going on?
Many thanks,
Tom

Hi
I just re-ran the debug feature and have found an issue which could be the cause of the problem:
Som of the data items in the dynamic select list have and ampersand (&) symbol. If I run the page once the hidden item displays the value properly:
0.22: binding: ":HIDDENREGION"="HIDDENREGION" value="Tech Comms Media Utilities & Hi-tech" if I re-run the page after navigating around the application for a bit is displays this value:
0.22: binding: ":HIDDENREGION"="HIDDENREGION" value="Tech Comms Media Utilities & Hi-tech"Please notice the "& amp;" bit which has been added... Is there any way of getting rid of this? as it is interfering with the query on the next page.
Many thanks,
Tom
Edited by: new_to_apex on Mar 2, 2009 3:13 AM
Edited by: new_to_apex on Mar 2, 2009 3:14 AM

FLTP_CHAR_CONVERSION_FROM_SI "Parameters" issue

Hi ,
I am trying to use this
function Module   "FLTP_CHAR_CONVERSION_FROM_SI" to convert Float to Char.
The parameters i am using are
CHAR_UNIT = KM
DECIMALS = 15
Exponent = 0
FLTP_VALUE_SI = 1.222222222222222E+06
Indicator VALUE = X
When I execute it , its giving me error message .
"please use number field for Input Value". If any one can tell me what I am using wrong. I really appreciate the time and full marks would be rewarded.
Thanks,
Mili-

Hi,
your input variable has to have some numeric type. Check this small example which works for me:
DATA: l_string(20) TYPE c,
        l_float TYPE f VALUE '1.222222222222222E+06'.
CALL FUNCTION 'FLTP_CHAR_CONVERSION_FROM_SI'
    EXPORTING
     char_unit              = 'KM'
     fltp_value_si          = l_float
     indicator_value        = 'X'
   IMPORTING
     char_value             = l_string
   EXCEPTIONS
     no_unit_given          = 1
     unit_not_found         = 2
     OTHERS                 = 3.

Parameters issue in discoverer while writing a view...its urgent please

Hi Everybody,
I have written a view in which i have a where condition which says something like
where abc IN ( Select xyz from table2).
Now in my desktop, i want a parameter to pass for the subquery as
select xyz from table2 where column1='bla bla bla'
please tell me how is this possbile.
thank you
kumar

Kumar.
1. Are you trying to show a LOV at run time? If so, you can create a LOV directly in the EUL via Disco Admin which will present a list of the items a user can choose from at run time (and not have to worry about a sub-query).
2. If it's an actual sub-query you need, then first of all, Disco v4 (maybe it was v9, but that was an ugly child anyway) is the last version that supported 'pseudo' sub-queries.
3. It's been written up in the forum many times about how to pass run time parameters to a folder in the EUL. There's one method that's popular for actually passing the parm to the folder.
4. Another method is to create a worksheet that only calls a function, to kick off a PL/SQL routine that builds a table using your parameter and then have the main worksheet call that new table.
So, if it's a LOV you want - that's a whole lot easier.
Russ

SQL server Database - Command based Crystal reports parameters issue

Hi,
We are migrating Oracle to SQL server database and trying to point our crystal reports to new database.
In command based reports, the parameters are defined in the where clause like this
(' All' in {?Country} or loc.country in {?Country} )
On modifying the report script to ANSI standard, loc.country in {?Country} gets recognized by Crystal but 'All' in {?Country} does not work.
I am pretty sure that it should be defined in a different way,but not able to figure out.
Any suggestions?
Thanks,
Nithya

Hi Nithya,
What is the error message you receive?
-Abhilash

How to change optimised hidden parameters in Oracle 10g.

Hello Gurus,
    SAP suggested me to change the following parameter values in Oracle database. But I am unable to make change in this parameter.
The parameters are mentioned as below.
Name
1> btree_bitmap_plans
2> sortelimination_cost_ratio
3> optimizermjc_enabled
I am unable to check the current values and chnge it to new value. So please suggest me the proper way to change this parameters.
Regards,
Jayendra.

Hello,
if you use an SPFILE you can use the following command:
alter system set "<underscore_parameter_name>" = <value> scope=spfile;
In case of init<sid>.ora you just specify the parameters in the file itself:
<underscore_parameter_name> = <value>
Regards
Martin

DB Adapter Polling Parameters Issues

Hi All,
We have a DB Adapter which polls on a table at every 60 seconds.we set database rows for transaction to 1 in the wizard.
but when 10 records inserted into the table,DB adapter is picking up all rows at a time. this is not the expected functionality.
I want to poll each row in table after 60 seconds..
Is there any Workaround or Property need to set
Regards,
Sudhakar.M

Hi All,
Issue resolved by setting the <property name="NumberOfThreads" value="1"/> value to 10
Thanks

Smart Playlist Creation Question - Rule Parameters Issue

I want to have newly imported songs go automatically into a playlist (Recently Added), from which I can move them into a playlist of their own. I then want to be able to CLEAR the Recently Added playlist so that I can then import a SECOND group of songs which will automatically go into the Recently Added playlist, where they will be the ONLY songs there because the first group of songs will have been CLEARED.
I inadvertantly deleted my Recently Added playlist, so that is not available to me - I have to, in effect, create my own Recently Added playlist.
The problem I am having has to do with the Smart Playlist Rule Parameters needed to accomplish what I am trying to do. I have been able to set up a smart playlist that receives newly imported songs automatically. However, I seem to be unable to CLEAR the songs from the smart playlist to make way for a SECOND group of newly imported songs.
I thought I could get the job done by simply deleting the entire Smart Playlist that contained the first group of songs, and then creating a new Smart Playlist to receive the second group. You can do that - but the problem is that the minimum time you are allowed to assign is one day. This means that when the second group of songs goes into the second smart playlist, it will also "grab up" and include the FIRST group of songs, assuming that the groups of songs are all being imported on the same day. I don't want to limit myself to importing only one group of songs per 24-hour period.
(When I import groups of songs, I import them in very, very large groups, which is why I want to be able to deal with them in individual groups, rather than having to sort through the larger, general Library of tunes in order to put them into their own playlists.)
It seems to me the answer lies in being able to set up a Rules Parameter that shortens the time involved from one day to something like 15 minutes or so. I don't know how to do that, even assuming that it can be done.
Or, perhaps, someone might have another suggestion that would help me accomplish my goal here.
Any and all thoughts will be much appreciated!

ed2345 wrote:
You can use playlist membership as a criterion in a Smart Playlist.
So if the list you are moving them to is "SecondPlaylist" (or whatever you wish to call it) then add a rule to your custom-tailored Recently Added that states "Playlist" "is not" "SecondPlaylist."
Not sure I am getting this. You understand that I am IMPORTING new files into iTunes - I am not moving already imported files into a playlist.
I can create a smart playlist with a Rule of: Playlist/is not/recently added (where "recently added" is the playlist I previously used to set aside the last group of songs imported into the music library). But when I click on OK to set it up, then I have to name it. And when I give it a name ("current load," for example) and confirm the name, suddenly, "current load" is filled with the last group of imported files. Don't ask me why - but that's what happened.
Any other thoughts? Anyone?

RFC to SOAP parameters issue - Odd!

All,
We have a RFC to SOAP scenario.. There is a table parameter with 4 fileds in it - OPERATION, ID, TYPE, VALUE.
And in RFC we pass the following in the table,
OPERATION - "CHECK"
ID - 001
TYPE - MAT
VALUE - 234567890
Somehow, the incoming XML doesnt have TYPE and VALUE, but have them concatenated into ID.When we debug on the ABAP side, we se the internal table populated properly just before the call.
But in XI - we see the incoming XML as,
<?xml version="1.0" encoding="UTF-8" ?>
- <rfc:Z_TEST xmlns:rfc="urn:sap-com:document:sap:rfc:functions">
<EX_TAB />
- <IM_TAB>
- <item>
<OPERATION>CHECK</OPERATION>
<ID>001MAT2345</ID>
<TYPE />
<VALUE />
</item>
</IM_TAB>
</rfc:Z_TEST>

Hi rk,
could it be that someone changed the coding of the RFC after you imported the RFC into XI?
If so, reimport again.
Regards Mario

Imac and Macbook Pro reset parameters issue

Looking for advice please.
Both my Imac and Macbook pro have not resonded upon startup and I have had to reset the paramters on several occassions.
Can anyone advise why this may have happened. Both computers less than 4 months old.
Thanks

Sometimes files get corrupt or lose their permissions this is normal part of most operating systems. When you lose permissions to a file it will not let you read or write to that file. This can cause problems with your system because to do work on your system you need to have access to read and write to some files.

Hidden, Dynamic parameters in Visual Studio web test - debugging

Hello! I am trying to debug a web test in Visual Studio and I'm running into the issue of incorrectly bound dynamic parameters.
Here is the error I am getting:
Request failed: Context parameter '$HIDDEN1.j_id71:_link_hidden_' not found in test context
I have looked at many blogs and websites that tell you how to fix this bug. (http://blogs.msdn.com/b/edglas/archive/2010/03/24/web-test-authoring-and-debugging-techniques-for-visual-studio-2010.aspx) However the websites haven't helped, my error is slightly
different from the one they outline.
This website in particular tells me how to find the place where the parameter is defined earlier in the code, but in my case this parameter never seems to have been defined. I can't figure out what extraction rule to use (if any).
Let me know if you have any suggestions/useful websites I can look at! Also let me know if you need more information. Thanks in advance!
-Danielle

Hello Jack,
Thank you for your detailed response. I had already gone through the first blog you recommended to no avail, but the second one seems to be leading me more in the right direction.
I have a few more questions for you after looking through this advice.
I added a validation rule like that second blog (http://blogs.msdn.com/b/slumley/archive/2007/11/19/debugging-errors-in-load-test.aspx) says to, and I am seeing that my form parameter "j_id71:_link_hidden_" doesn't exist.
However, I noticed when I right clicked on this parameter name in Response tab of the request that is failing, and selected "Quick Find", it searched for the value that the parameter has been assigned. It found this value in a QueryString parameter
named "_" in the previous request.
After studying my web test, I noticed also that this variable "_" is in many QueryStrings, and it always seems to match these hidden parameters that are not being found in the test context. I believe this query string parameter is the main source
of my issue.
The validation rule I added from that blog post is trying to validate the existence of a Form Post Parameter, however the value I want to extract is in a QueryString parameter. Is there a way to extract a value from Query Strings? I only have found ways
to extract from Form Post Parameters.
What do you recommend? Here are some things I've tried that have failed:
1. I tried renaming the parameter "_" to match the hidden one, that didn't work.
2. I tried creating a new Form Post parameter that matched the Query String parameter in name and value. Furthermore, I tried to use the Validation FormFieldExists rule from the blog to validate that the Form Post Parameter "_" exists, and that
failed. Why isn't it seeing the form field I create?
3. I tried to set the value of j_id71:_link_hidden_ Form Post Parameter in the failing request to {{_}}, so that it finds the value from the correct variable. This didn't work either.
Any other options you can suggest? I know this is a lot of information, I figured the deeper context may help you to help me debug this issue. Thanks again!!
-Danielle
[UPDATE] -- I tried to validate existence of a form post parameter that is obviously there and was there from the beginning, that also failed. Maybe a bug in the validation rule code...
[UPDATE 2] -- I have started to solve my issues by changing the value of these Form Post Parameters to certain QueryStringParam values. By looking in the Properties panel when I've selected a form post parameter that wasn't working, I can change the value
to one of these values using the dropdown. The dropdown menu has about 7 different options named "QueryStringParam11810.ct", for ex. Each param has a different number and ending associated with it, and by trial and error I've been finding matching
QueryStringParams to go with each hidden parameter. So far this is working... Not sure how to choose which value matches in a more specific way besides trial and error.
So I guess this is resolved, although if you have an explanation for all of this that would be very appreciated!

Hidden parameters issue.

Similar Messages

Maybe you are looking for