AWR Report Shows Wait Time Is High But OS Shows Wait Time As Normal
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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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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Jan 17, 2013
Imagine a table below and I want to write a statement that shows time,name,ip,received and sent (SELECT *). (time, city, ip are primary key lets say).However there is the condition that I want:
It should be grouped for each CITY and I want to get max(RECEIVED) by descending order for each days. How can I do that?
select *
from table
group by city
having max(received)
Is it possible to get output without giving condition to other elements (IP, SENT... etc)
TIME- NAME- IP- RECEIVED- SENT-
10.01.2013,LON,10,2342 ,326
10.01.2013,PAR,10,563463 ,3
10.01.2013,LON,30,23412 ,574
11.01.2013,NY,20,36545 ,246357
11.01.2013,NY,40,23423 ,5
11.01.2013,TOK,40,45475 ,3453
11.01.2013,TOK,30,23423 ,574574
12.01.2013,LON,10,574 ,2342
[code]....
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May 5, 2011
We are experiencing tx row lock wait time over hours. There is no blocking session and it seems that the application hangs. What is funny is that when we gather_stats on the tables, those tx row lock wait are being released.
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Jan 26, 2013
I have a RAC 48 cores on solaris. I check dbconsole when application performance is very slow and everyone complains, and I see that the main wait is cpu - also on the awr report. however when I check server cpu I see about 80% idle! so how can I make oracle use more cpu power instead of waiting for it? I don't think that parallel is an option here because I can't change the application code.
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Jun 9, 2010
I need to create a report that shows only the DD-MON of a birthday while ignoring the year and then having the output in DATE form so I can sort chronologically. My input is in DD-MON-YYYY format.
I have used Date_Trunc to pull out the month and day but the 29-Feb dates are giving me the ORA-1839 error message.
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Jun 29, 2011
I ran an AWR report. The database looks fine, but a data load that loaded 1 Million rows an hour is now doing 500K per hour.
Wait Class Waits %Time -outs Total Wait Time (s) Avg wait (ms) %DB time
DB CPU 224 80.70
Other 2,668 0 28 10 9.99
System I/O 4,753 0 9 2 3.23
Administrative 1 0 6 5543 2.00
Commit 357 0 4 11 1.46
[code]....
The network value for wait: 630,601. What does this mean? Anything I should look at? When it was 1million per hour, the value was 4,563,000.
Top 5 Timed Foreground Events
Event Waits Time(s) Avg wait (ms) % DB time Wait Class
DB CPU 224 80.70
unspecified wait event 2,666 28 10 9.99 Other
control file sequential read 4,753 9 2 3.23 System I/O
switch logfile command 1 6 5543 2.00 Administrative
log file sync 357 4 11 1.46 Commit
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Jun 24, 2013
We are using 11.2.0.3.0 on solaris 10 facing slow performance, following are the Wait Events in AWR report, Also if any specific document to analyze AWR report and to pin point the performance bottleneck.
Foreground Wait Events
**********************
Avg
%Time Total Wait wait Waits % DB
Event Waits -outs Time (s) (ms) /txn time
-------------------------- ------------ ----- ---------- ------- -------- ------
direct path read 308,729 0 21,191 69 58.0 39.5
db file sequential read 208,754 0 3,742 18 39.2 7.0
cursor: pin S 19,541,899 0 2,561 0 3,668.5 4.8
[code]....
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Oct 17, 2012
I see a strange result when I check for the offset in different databases,From the same SQL*Plus window.
SQL>
SQL> conn sys/**********@db1 as sysdba
Connected.
SQL>
SQL> col sysdate for a20
[code]....
where this difference comes from?why in db1 it shows +10:00, and on db2 it shows +11:00?
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Sep 29, 2010
When I execute my form, on pressing key F5 it displays the all available block names in the form. I want to restrict this.
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Jul 5, 2010
i created a form by using wizard...i want to improve that form...
I created one lov which is attached in one of form field..now when i press f9 lov displayed..
But when i select any one record in that LOV , its does not come in my form field
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Feb 4, 2013
I am working on oracle 11g...I have one normal insert proc
CREATE OR REPLACE PROCEDURE test2
AS
BEGIN
INSERT INTO first_table
(citiversion, financialcollectionid,
dataitemid, dataitemvalue,
[code]....
I am processing 1 lakh rows.tell me the reason why bulk collect is taking more time. ? According to my knowledge it should take less time. do i need to check any parameter?
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Aug 10, 2012
I've plan to use "CPU Time Per User Call" metrics.
The thresholds are:
Warning: 8000
Critical: 10000
But this alarm raise every minute.
I think it's too low.But which is the correct value to identify performance problems?
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Nov 8, 2010
I got the below message in trace file. What does the line "swap info: free = 0.00M alloc = 0.00M total = 0.00M" trying to say?
I have
RAM=1.5G
Swap=3.5G
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production With the Partitioning, OLAP and Data Mining options ORACLE_HOME = /home/oracle
System name:Linux
Node name:linuxdev
Release:2.6.5-7.97-default
Version:#1 Fri Jul 2 14:21:59 UTC 2004
[Code]....
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Aug 25, 2010
I am facing a very strange issue with one of our Oracle query. The query is usually completes in a minute or two. Even the execution plan of the query is good and it works perfect most of the times, as expected. The query fetches about 1000-2000 records each day.
But on a given day, the query takes about 30-40 mins to execute completely. Upon checking the load on DB server, there are no other processes running which can impact the run time of this query. Moreover, the record counts fetched are almost same as compared to other days. There is no pattern observed as that this phenomenon occurs. it all happens once in a while.
Configuration is Oracle 10g with RAC environment on LINUX
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Jun 10, 2011
I am trying to investigate my execution plans against my DB; and was informed i can check current status of SQL scripts using:
Performance tab > SQL Monitoring > Monitored SQL Executions
I click on SQL ID i want to investigate and comes back with blank screen instead of the overview tab.
See Oracle URL below for screenshot
Figure 6-8 Monitored SQL Execution Details Page
[URL]
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Mar 13, 2013
I have been trying to figure out how to write a query that shows each building code building name and number of rooms from a database with four tables : emp, build, room, roombook
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Jun 8, 2010
I have EM Agent 10g installed in its own Oracle Home (c:oracleagent10g) and Oracle 11g installed in its own Oracle Home (c:oracle11.2.0) The Server shows in EM console but the only target is the EM Agent,.. neither the Listener or the Database show under the targets tab in EM. Also, when DBCA is ran and we get to step 4 it shows NO AGENTS FOUND.
Have installed patch: 8825226 and 8968580 for EM Grid Control (Windows 2003 R2 32Bit) And 9138201 for 10g Agent on Server 2008 R2 (64bit)
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Apr 3, 2011
I am writing following query
SELECT DISTINCT a.list_type_code, a.list_type_name
FROM jls_list_type a, jls_list_control b
WHERE b.jalsa_srl = :jalsa_srl
AND b.list_no != a.list_type_code
ORDER BY list_type_code
I just want to display only those records from JLS_LIST_TYPE which is not present in other table JLS_LIST_CONTROL ... for this i wrote above query but it is not working.
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Sep 20, 2013
I am using Java print API (javax.print package) to send a bunch of documents for printing. Below is the code section that I am using to print documents through java program. When the document is sent for printing, I see the Job name is created properly in the print spooling queue on windows machine. But, when i go to the actual printer, the job name is different on the printer than what i saw in spooling. Since I am printing 100s of documents in batch, it gets very difficult to identify which document did not print, in case of issues. I also used the java.awt.print package . The java.awt. print. PrinterJob has a method setJobName(String). When i used this package, I got the name appear properly in both places. But I wish to use javax.print with the document name appear on printer queue.
public void printDocument(File pDoc, PrintService pService, DocFlavor pFlavor)
throws Exception { logMessage(true, "Printing Doc::" + pDoc.getAbsolutePath());
FileInputStream is = new FileInputStream(pDoc);
// Create the print job DocPrintJob job = pService.createPrintJob();
//Set print request attributes with file name as job
[code].....
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Nov 24, 2012
why a Gantt chart would show only the first 15 rows of the query?! I validated id to be unique , parent_id properly pointing to the parent. When I artifically create another level, the chart still subborny shows only 15 rows. The actual query returns 1590 rows.
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May 28, 2013
why CPU utilization is high(99%) on one server in 2 node RAC at every time. On the other server it is very low.
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Oct 1, 2011
When I am loding the data in person table through sql loder runs successfully without errors but when i check the person table it shows me zero records. Following is the details about what i done.
here are the details of data files.
1 Ahmed Baraka 1000 1.87 1-1-2000
2 John Rice 5000 2.4 10-5-1998
3 Emme Rak 2500 2.34
4 King Size 2700
5 Small Size 3000 31-3-2001
And The control File.
OPTIONS ( ERRORS=0)
LOAD DATA
INFILE '/oraeng/app/oracle/product/10.2.0/dbs/persons.dat'
BADFILE '/oraeng/app/oracle/product/10.2.0/dbs/persons.bad'
DISCARDFILE '/oraeng/app/oracle/product/10.2.0/dbs/persons.dsc'
INTO TABLE "KAILAS"."PERSONS" REPLACE
FIELDS TERMINATED BY X'9' TRAILING NULLCOLS
[code]...
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Jun 4, 2013
I have a virtual machine which have Windows Server 2008 R2 Datacentre 64-bit.
When I install Oracle Database 11gR2 and click on "SETUP" file, a message box namely JAVA VIRTUAL MACHINE LAUNCHER and display below error;
_"Could not find the main class. Program will exit."_
Same setup runs successfully on my server with Windows Server 2008 Enterprise.
Is it 11gr2 supports a virtual machine which have Windows Server 2008 R2 Datacentre 64-bit ? or some other?
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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 24, 2012
The below query is taking high CPU almost 98% and longer time to execute.
SELECT ancestor,
Max(D.alarmstate) ALARMSTATE,
Max(D.sialarmstate) SIALARMSTATE,
Max(D.uncralarmstate) UNCRALARMSTATE,
Max(M.commstate) COMMSTATE,
Max(M.nncommstate) NNCOMMSTATE,
Max(M.servicestate) SERVICESTATE,
Max(M.abnormal) ABNORMAL,
CASE
[code]....
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Sep 26, 2012
in my catalog database I see in Rc_datafile mismatch sizes - column bytes shows data different from the real sizes of files .
Does this view updated after copy of database into catalog ?
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Nov 28, 2011
I am using Forms 6i in Oracle Applications, In the button click event i used set_canvas_proeprty() twice. First time it executes these two statements, second time it does not. If i use any message() statement before these two statements, it executes.
Do we have wait() statement in Forms ?in apps we have app_item_property.set_property(), can we use same command to set canvas property also.
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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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