PL/SQL Timer Wait Event Analysis
Jun 22, 2013
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 ?
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Dec 11, 2012
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.
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Oct 8, 2013
DB 11.2.0.2AIX 6
I am getting following two top wait events from AWR report
1)SQL*Net more data from client
2)log file sync
Does it hints towards network latency and hardware configuration?what should i do for first wait event?
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Jan 25, 2012
I'm having a problem with the When-timer-Expired trigger.I am creating a timer on the On-Error trigger of the block. in the when-timer-expired :
message (11); exit_form(no_validate);
If i run the program program for the first time,message 11 doesn't show thus it doesn't fire the when-timer-expired trigger. But if i logout from application server and enter all over again,the when-timer-expired works !
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Jul 19, 2013
Yesterday i got wait event when executed simple select from table.This select was like:
SELECT emp_number from employer where subs_id = 111
I got one row, select is very fast.In our Core Bank System we have package with function which returns such information. I tested this select on test DB, and nothing wrong. But when I executed such select and package on Production DB, DB Admin saw that 88 sessions waits when my session release the resource. But what can happen, it was simple select? I used PL/SQL developer to get information from table:
1) SELECT emp_number from employer where subs_id = 111 then
2) Package with this function
Another users used Oracle Forms screen to execute package. How simple select statement could stop all DB?
BANNER
1Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bi
2PL/SQL Release 10.2.0.5.0 - Production
3CORE 10.2.0.5.0 Production
4TNS for 64-bit Windows: Version 10.2.0.5.0 - Production
5NLSRTL Version 10.2.0.5.0 - Production
[code]...
Forgot to say that after succeful execution on Prod DB I disconnected, and in EM my session was INACTIVE.
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Mar 6, 2013
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.
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Dec 5, 2011
I have 2 10g forms that runs continuousely. They are display screens of scheduled open work, that refreshes as it scrolls. The scrolling is based on a timer, and when it reaches the last record, the forms requeries, and continues on scrollling.
My problem is every few days, both screens that are connected to different PC, stall and stop working we have to manually restart the PCs and the screens work again for few days and the problem happens again..The message we are getting:
end of communication channel, and at the status bar we get: when timer expired raised an undandled exception...Is there a way to handle that exception, can we when it happen, refresh the screen or exit and restart again?
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Oct 2, 2012
We have a Oracle 10g database with RAC and Dataguard. When we look at the AWR report, the wait time shown by Oracle for this database is very high.
Service Time : 15.36%
Wait Time : 84.64%
This would imply Oracle is waiting for resources 85% of the time and only processing SQL queries during 15% of its non-idle time. However when we check the OS (RHEL), the iowait is only about 10% and the CPU is 80% idle. This means that that processing horsepower is available.
As such, the results between the OS and Oracle database (AWR report) seems contradictory. OS says we have CPU/IO capacity, however Oracle says we don't.
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Oct 6, 2013
Oracle8 Enterprise Edition Release 8.0.5.0.0 - Production
PL/SQL Release 8.0.5.0.0 - Production
CORE Version 4.0.5.0.0 - Production
TNS for 32-bit Windows: Version 8.0.5.0.0 - Production
NLSRTL Version 3.3.2.0.0 - Production
With reference to above oracle version. I am trying to retrieve top 300 donors from the table, below is my query.
Select * FROM
(select
distinct(d.contact_code),
c.contact_title||' '||c.contact_name,
c.contact_address,
c.contact_pcode,
ci.city_name,
cy.country_name,
[Code]...
ERROR at line 50: ORA-00907: missing right parenthesis
what is incorrect with this query. If I remove the main query then this query gives 76223 rows is correct, but I only want top 300 donors. How do I resolve this
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Aug 27, 2012
we have 1 server oracle and many clients. when client sends sql statement to server.How to Capture sql statement to analysis before it sent to server and execution.
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Mar 8, 2010
I have 2 tables that I am going to use. These are AUDIT_LOG, and AUDIT_PROPERTIES. AUDIT_LOG tells me that who made the change and at what time. AUDIT_PROPERTIES basically tells me that what the old value was and what the new value is.
These tables operate at the field level. For example, I have a module called BUG. Now a BUG (as a module entity or record) has several fields. There are around 25 fields. But I am interested in only 3 of these fields- these are BG_STATUS (Status), Priority (BG_PRIORITY) and Severity (BG_SEVERITY). This is my requirement:
Between a given period of time (let us say the month of January), give me the count of bugs that, 1) had an "Open" Status, 2) Were of "Medium" Severity, 3) And had a "Low" priority....each of these 3 conditions must be true simultaneously, means, that to be a "qualified" bug, the bug must be Open, Medium severity and low priority at the same given time within the month.
Below are the query and an image of the data looks like.
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Jan 27, 2011
I am looking for some tools for Performance analysis and optimization for Oracle. For now I looked over Spotlight, Ignite and Embarcadero DB Optimizer.
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Apr 28, 2011
The following error has occurred:
ORA-06550: line 26, column 30:
PL/SQL: ORA-06552: PL/SQL: Compilation unit analysis terminated
ORA-06553: PLS-320: the declaration of the type of this expression is incomplete or malformed
ORA-06550: line 7, column 6:
PL/SQL: SQL Statement ignored
I am getting the error when i run the below anonymous block. Historic_report_data has got plenty of columns and using only the columns that are in tb_Statement in the query. It is working fine if i use a table with same number of columns as tb_statement instead of historic_report_data.
DECLARE
v_cnt NUMBER:=0;
v_data_load_error EXCEPTION;
BEGIN
dbms_output.put_line('Reconciliation scripts');
dbms_output.put_line('Reconcile tb_bank_Account_month and report_hist_data');
[code]....
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Jul 21, 2010
I have two Oracle instances that are setup identically.When I run a query on one of them, it takes around 3 seconds, on the other it takes around 200 seconds.
I have looked at the explain plans, and it has shown me what I think is the problem. On one instance, it does a join on two tables, then runs the other filter/access predicates. On the other instance it runs the filter/access predicated first, then does the expensice join. The one that does the join first is the one that takes around 200 seconds. How to tell Oracle to make this join after runnning the other predicates?
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Dec 3, 2012
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;
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May 15, 2011
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?
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May 7, 2013
Any example of database startup event and database shutdown event?
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Nov 5, 2012
is there some open source or free tool which can graphical display V$ Views. Can TOAD do that in a good maner?
in UNIX there is the "sar" command, but a Java tool "ksar" for displaying the statistics in user friendly fashion.
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Jan 5, 2012
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.
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Apr 7, 2011
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'
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Feb 21, 2013
I have employees under a supervisor defines as below:
select LOGIN_USER_ID from APPWMS.VIEW_EMP_LATEST_INFO where SPVSR_LOGIN_USER_ID='erbrand' and EMP_STAT_CODE='ACTIVE'
Now I need to determine if all above employees are clocked in , clocked out or not clocked between yesterday and today using following:
select to_char(CLOCK_IN_DATE,'dd-mon-yyyy hh24:mi:ss' ) ClockIn,to_char(CLOCK_OUT_DATE,'dd-mon-yyyy hh24:mi:ss' ) ClockOut ,LOGIN_USER_ID,--CLOCK_IN_DATE,CLOCK_OUT_DATE, CLOCK_OUT_DATE-CLOCK_IN_DATE,trunc(sysdate) , trunc(sysdate-1),
case when CLOCK_OUT_DATE is null then
'Not clocked out'
else
[code]....
The first SQL gives me 66 rows while second gives me 40 rows. For 26 people , no rows are returned which means these people donot have a clock in record between two timestamps.
How can we modify query to show those 26 people as 'Not clocked In'
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Jul 4, 2012
I have a onchange event on a column which calls the following code:
function SetVal(pThis) {
//get the curren row index on change
var currIndex = $('select[name="'+pThis.name+'"]').index(pThis);
var currValue = pThis.Value;
alert(currValue);
$s('P21_mat_id_hold',currValue);
}currValue is "undefined"
Where am I missing something?
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Jul 17, 2012
OS: RHEL 5.7 64 bit
DB: 11.2.0.2 Standard Edition 64 bit
Everyday EOD is run and after the eod, users are requesting to receive a mail confirming the same from the database. For this we need to configure automated email which will be sent to a list of users email ID immediately after the EOD is done.
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Apr 17, 2013
In our environment we have db link to fetch data from other database. Whenever we try to fetch data using the dblink we receive the wait event "cursor: pin S wait on X" and we do not get any result. The db link works fine. what could be the issue.
DB Version : 11.1.0.7 OS: AIX
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Nov 14, 2006
i am using the Oracle 10 g 10.2 with the windows 2003 3 sessions from a single User shows the currenncy on the top activity graph of the enterprice manager they are not getting so much resources of system....when i go in the detail of the session i get
cursor: pin S wait on X
i am unable to kill these sessions how could i get rid of these sessions
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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?
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Mar 30, 2011
.I created the following procedure to implement Event Driven Reporting:
CREATE OR REPLACE procedure ABC.eve_drv_rep as
myPlist system.SRW_PARAMLIST;
myIdent system.SRW.Job_Ident;
BEGIN
myPlist := system.SRW_PARAMLIST(system.SRW_PARAMETER('',''));
system.srw.add_parameter(myPlist,'GATEWAY','apsIP/reports/rwservlet');
[code]...
Procedure is created successfully but when I execute this procedure, I get the following error:
ORA-20001'Error sending email.Error: ORA-20999
ORA-06512: at "Nml.Eve_Drv_Rep", line 17
ORA-06512: at line 1
2ndly I want to know that whether I should give IP address or Application Server Machine Name in GATEWAY parameter?
And in SERVER parameter either I should give the Application Server Machine Name or Report Server name installed on Application Server Machine?Lastly from where I can get the complete list of Parameters to be added in SRW.Add_Parameter like SERVER, GATEWAY etc.
note that we r using Database 10g Rel.2 and Forms and Reports services on Application Server and the report being called was developed in Reports 10g.
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Apr 24, 2013
I'm using Skillbuilders Modal Page 2.0.0. plugin on Apex 4.2, and I can't seem to get the event End Open to work. stumbled upon this thread Skillbuilder Modal Page - Dynamic Title; nothing happens even if I set an alert to pop up on End Open
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Apr 13, 2011
In a 3-node RAC setup; one node is showing high CPU utilization around 40~50%. The CPU utilization was less than 20% 10 days back but from 9th oldest day it jumped and consistently shows the double figure. I ran AWR reports on all three nodes and found one node with high CPU utilization and shows below tops events-
EVENT WAITS TIME(S) AVG WAIT(MS) %TOTAL CALL TIME WAIT CLASS
CPU
time 5,802 34.9
RFS
ping 15 5,118 33,671 30.8 Other
Log file sequential
read 234,831 5,036 21 30.3 System I/O
Sql*Net
more data from
client 24,1711,08745 6.5 Network
Db file sequential
read130,939 4533 2.7 User I/O
Findings:-
On AWR report(file attached) for node= sipd207; we can see that "RFS PING" wait event takes 30% of the waits and "log file sequential read" wait event takes 30% of the waits that occurs in database.
1)Are these symptoms of undersized log buffer?
2)I feel Network wait can be reduced by tweaking SDU & TDU values based on MDU.
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Nov 15, 2012
Is there any way I can capture on change event for the Select List (already created on the page) using java script and then refresh chart region?
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