Meaning Of Lines CPU Cores And 99th Percentile In Average Active Session
Apr 18, 2013
I´m monitoring a 11g database with OEM. I have a couple of questions regarding the Average Active Sessions chart:
- What does the line 'CPU core' means? The DB is running in a virtual server with 8 CPUs. However, the line 'CPU core' is in 1. Does it mean that Oracle is just using 1 CPU?
- What represents the '99th percentile' line? The chart shows several sessions above that line, something is not working well, isn't it?
11.2.0.3 EVENTS: Null(blank) or called a 'null event' See link. Checked the docs. I don't see anythingI think a null (blank) is for an idle wait since per the V$ACTIVE_SESSION_HISTORY spec these are not record. Am I correct?What is a 'null event'. I see a paper from Oracle magician dating to 9i that says this is an 'oracle goof'. Descriptions of Wait Events
Server: Windows 2008 R2 x64 Oracle Database 11g Release 11.2.0.1.0 Standard Edition
I recently applied the Oracle® Database Server Version 11.2.0.1 Patch 16 I have several databases running on this box with the same application.Since then I've had lots of customers complaining about slow systems. The server has plenty of RAM availableI also have several other servers all on the same versions, same patch, running the same application with no issues.
Looking at v$session there are often lots of active sessions that have a sql_address of "00". I've never seen this before and I regularly look at v$session, as you can see for below these have been running for a while. The sessions do drop off but I am at a loss as to what is happening.
select username, last_call_et, sid, serial#, user#, status, sql_address, sql_hash_value from v$session where username is not null and status = 'ACTIVE' order by last_call_et desc, sid
I am getting starting with rac environments. I need to configure a two nodes active/active with rac and I need to know if always using rac both nodes will be active or if I have to do that at some point when installing. I have reading some docs from oracle and others authors about rac and its configuration process but that is not understood for my yet.
We are using oracle as database in our application. For high availability we have a cluster of multiple nodes and the data is replicated using oracle streams. All the nodes in the cluster are active. We do not have any concept of stand-by.
Now we are planning to use oracle RMAN for backup and recovery. RMAN user's guide doesn't recommend any strategies for such deployments. It mainly focuses on primary/stand-by deployments.
i want to understand each and every concept of oracle.in this book they explained about escape character, but stiil i cant get it..i want to understand why used escape character in 2nd query and whats its effects...
1. SQL> SELECT first_name, last_name FROM employees WHERE first_name LIKE 'Su%' AND last_name NOT LIKE 'S%';
2. SELECT job_id, job_title FROM jobs WHERE job_id like 'AC\_%' ESCAPE '';
I have an urgent requirement to kill an existing session if a new session starts for the same user. I have been reading lot of blogs and posts on the above topic, but could clearly tell me how to do it.
I thought of putting a process in 101 page when login button is pressed to catch this and kill the old session.
We are using Apex 4.0/Oracle 10gR2/ Hp-Ux, We noticed that there is a process Running in Two Sessions that seems running since 3 Hours using 60% CPU,** 30% given below sql it executes in two Sessions!
declare function x return boolean is begin -- if instr(upper(:F4000_P4651_PLUG_SOURCE),'ORDER BY')>0 then declare l_position number := 0; begin loop l_position := instr(upper(:F4000_P4651_PLUG_SOURCE),'ORDER BY ',l_position + 1) ; exit when instr(upper(:F4000_P4651_PLUG_SOURCE),'ORDER BY ',l_position + 1) = 0 ;
I have a table with products (xPRODUCT), dates (xDATE) and parameters (xPARAMETER). Now I want to calculate the rolling 12 month average of the parameters over all products for all dates. I tried this:
select xDATE, avg(xPARAMETER) over ( order by xDATE range between numtodsinterval(365,'day') preceding and current row )
How To Calculate Average in Forms 6i for example a summary column named (Amount = 5000) and i want to calculate 15% average of this amount i want to calculate it like summary column .
how to calculate the average of the time in th e HH:MM:SS format stored database table.. column contains hundreds of time values and need to table the avergae of it
my col look like,and column is declared as timestamp(6).
MY COL ------ 1:13:00 1:06:00 0:43:00 0:47:00 0:32:00 0:19:00 0:39:00 0:46:00 0:56:00 1:39:00
Serial no exp_Date exp_type exp_amount 1 01-nov-2012 Rent 10000 2 02-nov-2012 gas 250 3 02-nov-2012 insurance 9500 . . .
I want to create a sql output for a yearly view in the format
exp_type JAN FEB MAR APR ..... NOV DEC TOTAL AVERAGE PROJECTED Rent 10000 10000 10000 10000 10000 10000 120000 10000 120000 gas 250 250 250 250 250 250 3000 250 3000 . .
Now a couple of things in this
1. the average gives the average for the year, so lets say its start of 2013 and we are in feb, there will not be any values for the remaining months, so it should do the average for that exp_type for Jan and Feb based on the exp_amount entered against that type and show what is the expected average. Similary, projected will that average amount and mulitply it by 12 to show the exp amount expected based on current expenses
I was able to come up with the following sql to get the sum based on months, was not sure about average, total and projected
SELECT exp_type , SUM (CASE WHEN to_char(exp_date,'Mon') = 'Jan' THEN exp_amt END) AS Jan , SUM (CASE WHEN to_char(exp_date,'Mon') = 'Feb' THEN exp_amt END) AS feb , SUM (CASE WHEN to_char(exp_date,'Mon') = 'Mar' THEN exp_amt END) AS Mar , SUM (CASE WHEN to_char(exp_date,'Mon') = 'Apr' THEN exp_amt END) AS Apr , SUM (CASE WHEN to_char(exp_date,'Mon') = 'May' THEN exp_amt END) AS May
[Code]....
getting the correct avg, total and projected fields also in the same sql?
,I've some database in 11.2 RAC on AIX.I was analyzing the root causes of eviction.Looking AWR Report before the reboot I see:
DB1 Host CPU (CPUs: 6 Cores: 3 Sockets: )~~~~~~~~ Load Average Begin End %User %System %WIO %Idle --------- --------- --------- --------- --------- --------- 4.18 12.33 60.9 12.6 1.6 26.5 Instance CPU~~~~~~~~~~~~ % of total CPU for Instance: 27.4 % of busy CPU for Instance: 37.3 %DB time waiting for CPU - Resource Mgr: 10.6 DB2 Host CPU (CPUs: 6 Cores: 3 Sockets: )~~~~~~~~ Load Average Begin End %User %System %WIO %Idle --------- --------- --------- --------- --------- --------- 3.77 13.93 60.7 12.5 1.6 26.7 Instance CPU~~~~~~~~~~~~ % of total CPU for Instance: 6.9 % of busy CPU for Instance: 9.5 %DB time waiting for CPU - Resource Mgr: 0.0
Do you think these value ar high? This is vmstats at the time of reboot:
How can i write a query so that i takes the average of students in each room and display the output? I need to write a query so that it also picks up any new rooms and students added. Average is sum of total students in room by number of times each room is specified.
eg: A1 is listed 3 times a the result would be 10+20+15 divided by 3.
In Oracle XE when I run PL/SQL in the SQL Commands window I will sometimes get a "Not found" error. It further reads, "The requested URL /apex/wwv_ flow.show was not found on this server". I found that if I remove all of the indentations from the lines of the PL/SQL code everything will work fine. Talk about a screwy problem. So, if you have that problem just take all of your PL/SQL code and slam it up against the left margin.
I have to procedure that computes number of project, and average working hours of employees where employee id is passed as a parameter to the procedure. If the average working hours is less than 10 then employee's salary remain the same, otherwise check if number of project is less than 4 then 5% of salary, else 10% of salary is added to the salary.
I want to write a sql qeuery to get result similar to expected average column as shown in sheet.
Record can be uniquely identified by columns ID, PRODUCT and OFFICE. I want to calculate average for each date considering the same record does not exists earlier i.e. I want to consider the latest vote while calculating average. E.g.
Average till date 1/1/2011 is Avg (2, 4, 3) = 3 (as no repeating vote value exists) Average till date 2/1/2011 is Avg (4, 3, 5, 3) = 3.75 (excluding vote value 2 as 122_UK_LONDON was provided his vote earlier, so considered latest vote value i.e. 5) Average till date 3/1/2011 is Avg (3, 5, 3, 6, 5, 8 ) = 5 (excluding vote value 2 for 122_UK_LONDON and vote value 4 for 967_Europe_London)
I need to calcaulate the salary avarage for three days prior, leaving the current row. That should happen to every row moving back words.I have given all the details.
create table Employee( ID VARCHAR2(4 BYTE) NOT NULL, name varchar(20), Start_Date DATE, Salary Number(8,2), mv_avg number(8,2) [code]....
I want to convert this query to just return a single line for -cidterr.rnam, cidterr.rnum, cidterr.tnam, cidterr.tnum
With an average sum by week. Similar to how if I did a sum by week from the original query and placed the results into an excel pivot and said show total as average.
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production PL/SQL Release 11.2.0.1.0 - Production "CORE 11.2.0.1.0 Production" TNS for HPUX: Version 11.2.0.1.0 - Production NLSRTL Version 11.2.0.1.0 - Production
I have a problem related with hierarchical queries, I have this tree. - a / b c / | d e fI need to calculate an average per node but using always the child's results for example: Only leafs will have values:
d = 10 e = 20 f = 30 c = 40So the expected result is: d = 10 e = 20 f = 30 c = 40 b = (10(d) + 20(e) + 30(f)) / 3 (number of child nodes) = 20 a = (20(b) + 40(c)) / 2 (number of child nodes) = 30.
I have tried with recursive queries, hierarchical queries, I guess it's possible with model too but I can't produce the exact results that I need. Maybe in fact there is a very simple solution but I cannot figure it.
Here is an auxiliary WITH that you can use to start your tests: WITH tree AS ( SELECT 'd' child, 'b' parent FROM dual UNION ALL SELECT 'e' child, 'b' parent FROM dual UNION ALL SELECT 'f' child, 'b' parent FROM dual UNION ALL SELECT 'b' child, 'a' parent FROM dual UNION ALL SELECT 'c' child, 'a' parent FROM dual UNION ALL SELECT 'a' child, null parent FROM dual [code]....
I want added one new column in the below report which will shows only the items purchased on Cash basis but when i am running the query the column not showing any data.
