Database Time Spent Waiting % For Event Class Concurrency
Dec 4, 2012
Most of my day to day work involves the support of DB2 on AIX and z/OS. I support the database infrastructure for one business system that runs on the Oracle RDBMS. The application is Oracle Transportation Management. The non-production environments don't get much traffic. If I sign into the TEST or DEV Enterprise Manager DB Control screen, the following warning is almost always listed on the main page:
Metrics "Database Time Spent Waiting (%)" is at 44.00384 for event class "Concurrency"
Enterprise Manager reports that this metric is continuously fluctuating above and below the warning threshold of 30% of db time when the environment is idle.To investigate(and I am no oracle expert, far from it), I ran the following:
SELECT * FROM v$session_event
WHERE WAIT_CLASS='Concurrency'
ORDER BY TOTAL_WAITS DESC;
By far, the top two entries in the result are the following:
SIDEVENTTOTAL_WAITSTIME_WAITEDAVERAGE_WAITMAX_WAIT
124os thread startup12041423733.5218
359os thread startup150653433.5521
[code]...
Does this indicate a possible problem with the operating system?
i'm keep on getting below error every morning in my Database.this indicate in Grid control every morning.
Metrics "Database Time Spent Waiting (%)" is at 34.336 for event class "Concurrency" Metrics "Database Time Spent Waiting (%)" is at 100 for event class "Other" Metrics "Database Time Spent Waiting (%)" is at 44.78 for event class "Other"
i need to know, this is something that i should consider as a critical warning and how can i solve this .
I have a problem with a statement that normally execute in few second but after 50h the session is still active and is still waiting for null event.
V$session_wait
EVENT WAIT_TIME SECONDS_IN_WAIT STATE ---------------------------------------------------------------- ---------- --------------- ------------------- null event -1 178737 WAITED KNOWN TIME V$session
SID STATUS PROGRAM LAST_CALL_ET ---------- -------- ------------------------------------------------ ------------ 364 ACTIVE f90runm@CENTRAL1 (TNS V1-V3) 178737
My Oracle version : Oracle9i Enterprise Edition Release 9.2.0.2.0 - 64bit Production System version : HP-UX V1
I tried tracing the session but no trace file is generated it same there is no activity.
I have two methods using pro*c to execute a query SQL and read the results. The query is a "select from" a view, this view is a union between two tables. The first method creates a cursor and fetches the results line by line. A second method creates a cursor and fetches the results in parts.
Method 1) CODEEXEC SQL FETCH Cursor1 INTO ...
Method 2) CODEEXEC SQL FOR :numLines FETCH Cursor1 USING DESCRIPTOR areaDescSQL;
I had executed this methods in my development enviroment, using Oracle 11g, Suse linux. As I expected, the method 2 spent much less time than the method 1. But, in the "customer enviroment", using another database, Oracle 11g and HP-UX, these methods spent almost the same time.
Is there some Oracle's configuration or parameter's settings that maybe explain that? What configuration can be differente between the two databases? What can I do to improve the time spent?
we are running Oracle R12.1.3 on DB version 11.2.0.3. I just migrated a created a custom subscription for the oracle.apps.ap.supplier.event Oracle Event. I execute a custom package when this event fires. My package is working fine and I'm getting the expected results. My problem is I keep getting a Workflow notification saying:
Sent: Monday, March 04, 2013 9:14 PM To: SYSADMIN Subject: Action Required: Local Event UNEXPECTED : oracle.apps.ap.supplier.event / 36422
To SYSADMIN Sent 04-MAR-2013 21:13:40 ID 1659929
An Error occurred in the following Event Subscription: Event Subscription
Event Error Name: Event Error Message: No Event Subscriptions exist for this Event Event Error Stack: Event Data: Event Data URL Event Details Event Field Value [code]...
I saw an earlier post about this and have tried changing the Source Type to "External" but that didn't change anything. why Workflow is telling me a subscription doesn't exist when my subscription is executing with no problems.
I am trying to look at wait events for a long running query in TOAD.I start the query on one instance of TOAD and open the Session Browser on another instance.But I am surprised to find that in "TOtal Waits" on the RHS-> SQL*Net message from client is the longest time taking and is already -> 178577 units whereas I have just started the query.
Whereas in the Current Waits it shows DB File Scattered Read currectly as some seconds.
I've heard about diferent ways of generating email in response to a database event e.g
1 - Using UTL_MAIL package. OR 2 - Event Driven Reporting feature of 10g Database and using SRW.Run_Report package to generate and mail a report.
Now I'm confused that how should I accomplish the following tasks:
(i) - How to generate an email after Insert/Update/Delete on a table and acknowledge the concerned users about that event? (ii)- How to attach a text file with that email?
I have database 10.2.0.3 with one procedure that calls some java class loaded in database. Unfortunately I don't have source code of that java class or whole jar that was loaded into database.I would like to download it from database and try to decompile it.
how can I download some java classes from database? Everything I know is only the name of some java class that is used in one PL/SQL procedure (CREATE OR REPLACE PROCEDURE ..... AS LANGUAGE JAVA).
How to Pick / Extract the java class files from the database.? We have not maintained the latest codes in the oracle application server where java class code is residing.
All the Java Classes are available only in database. So we need to pick the latest java class code from production environment. In TOAD we tried but all class objects are listing at the left side but we are unable to take the code. So how can we take the latest codes(java classes) from the Production Database as a backup.
can i use ORA_ROWSCN to handle concurrency in oracle, That is i want to read ora_rowscn and keep it in my form or BL then before update i want to read ora_rowscn and match with old version.
1)Since it is updated after commit , how can it affect the application?
2) should i use some Guid in place of ORA_ROWSCN?
3) sequence in each table with trigger in place of ORA_ROWSCN?
I have a table with unique index, and the application is doing inserts/updates into this table.Suddenly and for about half a minute I faced a high concurrency waits on all the processes running these inserts for one node. I saw this high concurrency wait in the top activity screen of the OEM only on one of the nodes. knowing that the processes doing these inserts are running on both nodes.
All what I have that in this half minute I see high concurrency wait in OEM top activity screen related to this insert statement and when I clicked on the insert I found high "enq: TX - index contention". Again this was only on one node.After this half minute everything went back to normal.What could be the reason and how can I investigate it ?
When running into what should be an OptimisticConcurrencyException in entity framework, i'm getting an update exception as follows:
"A null store-generated value was returned for a non-nullable member 'DateChanged' of type 'FDDT.Model.FeedArray'."
I'm using the DateChanged field as the concurrency tracking field. In entity framework DateChanged has the following properties: StoreGeneratedPattern: Computed Concurrency Mode: Fixed
I have a trigger set on this field as follows:
TRIGGER FEED_ARRAY_TRIG_DTCHG before update on FEED_ARRAY for each row begin :new.DATE_CHANGED := sysdate; end;
I've tried setting this concurrency tracking field to "Identity" instead, however that causes another error when I run into a concurrency exception and refresh using the client wins option.
Installation Oracle Database 11g Release 2 RAC On Linux Using VMware Server folowing error occured
Software = Grid Infrastructure 11.2.0.1 RAC installation on VMware two node linux machine. Windows 7 Machine 8 GB Ram LInux node 1 and node 2 with 2.5 GB RAM
Node 1: root.sh script run successfully.
NOde 2: root.sh script given following error.
CRS-2672: Attempting to start 'ora.crsd' on 'rac2' CRS-2676: Start of 'ora.crsd' on 'rac2' succeeded CRS-2672: Attempting to start 'ora.evmd' on 'rac2' CRS-2676: Start of 'ora.evmd' on 'rac2' succeeded
i am getting a below error whenever executing the below select query. some times it will show dead lock detected while waiting for resource and terminated...some times it executes and gives result..but all the time it writes an alert to alert log
Env: Linux / Oracle 11.2.0.3.3..Error from alert log:Errors in file /u01/oracle/oracle/diag/rdbms/bdrdb/bdrdb/trace/bdrdb_p017_6076.trc:ORA-00060: deadlock detected while waiting for resourceORA-10387: parallel query server interrupt (normal) Trace file info... bdrdb_p017_6076.trc:Trace file /u01/oracle/oracle/diag/rdbms/bdrdb/bdrdb/trace/bdrdb_p017_6076.trcOracle Database 11g Enterprise Edition Release 11.2.0.3.0 - ProductionWith the Partitioning, OLAP, Data Mining and Real Application Testing optionsORACLE_HOME = /u01/oracle/oracle/product/11.2.0/dbhome_1System. [code]....
When i try to compile a package, im getting below error.
ERROR at line 1:ORA-04021: timeout occurred while waiting to lock object
i gave below query and found the sid of object.
select * from v$access where object='THINKING_PKG'
From v$session view,i found sid and serial# and at same time i queried dba_jobs and saw one jobs is running at this time.Now how to compile this object.
I have an application in which time is show as . But, in the table in Oracle it is showing as 13:00. The application is taking the time from OS. OS time is 18:30 IST. Time in SYSDATE is also showing as 18:30. DBTIMEZONE is '+5:30'. what is the problem in Database and how that can be rectified to show the time as same as OS time.
how to know the trigger event name in trigger calling...like-
CREATE OR REPLACE TRIGGER ****** BEFORE DELETE OR INSERT OR UPDATE OF TOTAL_QUANTITY,CANCELLED ON ********* REFERENCING NEW AS NEW OLD AS OLD FOR EACH ROW BEGIN
-----------I want to know given trigger event at this level-----------
IF INSERTING THEN null; ELSIF UPDATING THEN null; ELSIF DELETING THEN null; END IF; END;
how to write a single query, Also i may add /delete school/class anytime. Query should support mesans everything dynamically should get the data.Even stored procedure will work for me.
I'm modifying a package which contains a function with different parameters (say cno, gno, pname etc) need to be passed though it and that function is called by the cursor later in the program. I need to create a cursor (select statement) for every class (a program set)...i.e. multiple select statements for a program set with different values. The parameters needed to be passed correspond to same columns in different tables...so do i have to refer those tables everytime i'm passing the parameters using a select statement? The Program accepts the parameters as an array (list of parameters) and returns a cursor and the program handles one program set (class) at a time. That parameter list will be in a loop..i.e. it will be repeated for every certain combination (say cno - pname combination). So ... How should i proceed and create a select statement with different parameters declared in the function of type string making it dynamic and returning them using ref cursor?
I deploy sound.java to sound,jar and the deployed process is completed Successfully. I also executed all the configuration steps required to use this class from "Orale9i form builder" and it's ok
The problem is:
When I tried to import "sound" class from "Oracle9i form builder" by clicking
Program----> Import Java Class-----> Oracle.forms.fd.sound Then an error has occurred:
Importing Class oracle.forms.fd.Sound... Exception occurred: java.lang.NoClassDefFoundError: oracle/forms/ui/VBean
I need to filter ticket prices according to the class; i.e.
CASE WHEN booking_class = 'Economy' THEN economy_saver ELSE 0 END AS ECONOMY_SAVER THEN economy_basic ELSE 0 END AS ECONOMY_BASIC THEN economy_basic_plus ELSE 0 END AS ECONOMY_BASIC_PLUSEND, CASE WHEN booking_class = 'Business' THEN business ELSE 0 END AS BUSINESS THEN business_flexible ELSE 0 END AS BUSINESS_FLEXIBLEEND.
..The objective is to show only the prices that belong to the selected class. I am not sure if my sql is correct at this point.
One of our Job running long than usual time. I checked the wtait event for which its waiting. its PL/SQL Timer wait. But i noticed the total waits is 179 and timed out is also 179 for PL/SQL Timer. I checked that job that particular procedure calls dbms_lock.sleep in it. I want to know why this wait event is getting timed out ?
how to query a list to see if a person had events in consectutive months within the past year. We call a person a LongTermResident if they had a review in any two consectutive months within a reporting period. I wrote a function isResidentLongTerm, passing in FacilityID, ResidentID, ReportPeriodStart, and ReportPeriodStop and returning a 'Y' or 'N'. It works, but the performance is slow.
So if I have a list of reviewers, facilities, reviewees I want to select only those SNF/NF residents who have had routine reviews in any two consectutive months at the same facility.
This is my query:
select ConsultantID, ResidentID from ( select distinct ConsultantID, FacilityID, ResidentID from Reviews where BedType = 17820 -- SNF/NF bed and ReviewType = 17474 -- routine review ) where isResidentLongTerm( FacilityID, ResidentID, :startDate, :stopDate ) = 'Y'
when I import java class from oracle forms (import java class ->> FFileChooser) appeared FFileChooser package but i don't know how use it how use OPEN_DIALOG or other function .
I am using Developer 10g R2. I have a form with two fields named input_value and output_value and a button named ok. I have a java class named Factorial which return the factorial of the input value. Now i want to use this class into pl/sql in ok button.
I need to add one validation in one form. The form is not getting run locally because of some imported java classes which was already there. From application server it works fine. When i run locally it gives ORA_JAVA.EXCEPTION_THROWN. Actually some trigger calls a procedure from this imported java class. Some path is specified in JNI.NEW_OBJECT(). That patg may not be in local system. If those files are included in our oracle home directory
