CPU TIME and DB CPU events under TOP 5 TIMED FOREGROUND EVENTS section in AWR report

Is there any difference between "CPU TIME" event and "DB CPU" event when shown in AWR report under section "TOP 5 TIMED FOREGROUND EVENTS"?
As per my understanding of both these terms they indicate the same thing. But then if it is so then why have different names?
I searched around but the only relevant discussion that I found was as under, which didn't really cleared the doubt.
https://forums.oracle.com/message/2571255#2571255

In the article that you have mentioned - Jonathan Lewis gives you a very clear explanation. CPU Time is updated at the end of a query. DB CPU is updated every few seconds.
So the CPU Time may be less than DB CPU if there is a long running query that did not complete during the snapshot that you are reporting for. Conversly CPU Time may be larger than DB CPU if there is a long running query that spanned multiple snapshots but completed in the snapshot that you are reporting for.

Similar Messages

CPU time and ELAPSED time in tkprof question

Hi,
I have a statment that is running more than 3 HR.
I run 10046 event and found that the CPU time and the ELAPSED time is almost the same:
call count cpu elapsed disk query current rows
Parse 2 0.00 0.00 0 0 0 0
Execute 2 0.00 0.00 0 3 0 1
Fetch 97 10175.76 10094.81 11216 56387604 0 1441
total 101 10175.76 10094.82 11216 56387607 0 1442
Is that can indicate of a problem in the machine ?
The TOP activity also shows 99% cpu usage.
CPU TTY PID USERNAME PRI NI SIZE RES STATE TIME %WCPU %CPU COMMAND
6 ? 24700 oracle 232 20 5448M 13184K run 195:34 99.18 99.00 oraclepcr
Thanks

Hi,
Thank you for your replay.
Its version 10204 on HP-UX with 24GB and 8 CPUs.
No i dont have any MERGE JOIN CARTESIAN.
The reason that i didnt upload the plan is because its too long...far too long ....
call count cpu elapsed disk query current rows
Parse 1 42.20 41.38 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 5 444.12 447.27 1153 2486187 0 61
total 7 486.32 488.65 1153 2486187 0 61
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 65 (PSSYS)
Rows Execution Plan
0 SELECT STATEMENT MODE: ALL_ROWS
0 UNION-ALL
0 CONCATENATION
0 NESTED LOOPS (OUTER)
0 NESTED LOOPS (OUTER)
0 NESTED LOOPS (OUTER)
0 NESTED LOOPS
0 NESTED LOOPS (OUTER)
0 NESTED LOOPS (OUTER)
0 NESTED LOOPS (OUTER)
0 NESTED LOOPS (OUTER)
0 NESTED LOOPS (OUTER)
0 NESTED LOOPS
0 NESTED LOOPS
0 NESTED LOOPS (OUTER)
0 HASH JOIN (OUTER)
0 HASH JOIN (OUTER)
0 NESTED LOOPS (OUTER)
0 NESTED LOOPS (OUTER)
0 NESTED LOOPS (OUTER)
0 NESTED LOOPS (OUTER)
0 NESTED LOOPS (OUTER)
0 NESTED LOOPS
0 NESTED LOOPS
0 NESTED LOOPS
(OUTER)
0 NESTED LOOPS
(OUTER)
0 NESTED LOOPS
(OUTER)
0 NESTED LOOPS
(OUTER)
0 NESTED
LOOPS (OUTER)
0 FILTER
0 HASH
JOIN (OUTER)
0
TABLE ACCESS MODE: ANALYZED (BY
INDEX ROWID) OF 'PS_RD_COMPANY'
(TABLE)
0
NESTED LOOPS
0
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0
NESTED LOOPS
0
NESTED LOOPS
0
HASH JOIN
0
TABLE ACCESS MODE:
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INDEX MOD
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INDEX MODE:
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0 INDEX MODE: ANALYZED (UNIQUE SCAN) OF
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0 NESTED LOOPS (OUTER)
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0 NESTED LOOPS (OUTER)
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0 NESTED LOOPS (OUTER)
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0 HASH JOIN (OUTER)
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NESTED LOOPS
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HASH JOIN
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NESTED LOOPS
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INDEX MODE: ANALYZ
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INDEX MODE: ANALYZED
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TABLE ACCESS MODE: ANALYZED
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INDEX MODE: ANALYZED (UNIQUE
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TABLE ACCESS MODE: ANALYZED (BY
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INDEX MODE: ANALYZED (UNIQUE
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INDEX MODE: ANALYZED (RANGE
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0 VIEW PUSHED PREDICATE
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0 INDEX MODE: ANALYZED
(RANGE SCAN) OF 'PS3RSF_INDUSTRY' (INDEX)
0 TABLE ACCESS MODE:
ANALYZED (BY INDEX ROWID) OF 'PS_BO_CM'
(TABLE)
0 INDEX MODE: ANALYZED
(RANGE SCAN) OF 'PS_BO_CM' (INDEX (UNIQUE))
0 TABLE ACCESS MODE: ANALYZED
(BY INDEX ROWID) OF 'PS_BO_CM_USE' (TABLE)
0 INDEX MODE: ANALYZED
(RANGE SCAN) OF 'PS_BO_CM_USE' (INDEX (UNIQUE)
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0 INDEX MODE: ANALYZED (UNIQUE
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0 TABLE ACCESS MODE: ANALYZED (BY
INDEX ROWID) OF 'NAP_INTERNET' (TABLE)
0 INDEX MODE: ANALYZED (UNIQUE
SCAN) OF 'PS_NAP_INTERNET' (INDEX (UNIQUE))
0 MAT_VIEW ACCESS MODE: ANALYZED (BY
INDEX ROWID) OF 'BB_CODE_TABLE' (MAT_VIEW)
0 INDEX MODE: ANALYZED (RANGE SCAN)
OF 'BB_CODE_TABLE_I' (INDEX)
0 MAT_VIEW ACCESS MODE: ANALYZED (BY
INDEX ROWID) OF 'BB_CODE_TABLE' (MAT_VIEW)
0 INDEX MODE: ANALYZED (RANGE SCAN)
OF 'BB_CODE_TABLE_I' (INDEX)
0 MAT_VIEW ACCESS MODE: ANALYZED (BY
INDEX ROWID) OF 'BB_CODE_TABLE' (MAT_VIEW)
0 INDEX MODE: ANALYZED (RANGE SCAN) OF
'BB_CODE_TABLE_I' (INDEX)
0 MAT_VIEW ACCESS MODE: ANALYZED (FULL) OF
'IP_PIRSUM_CODE' (MAT_VIEW)
0 MAT_VIEW ACCESS MODE: ANALYZED (BY INDEX
ROWID) OF 'BB_CODE_TABLE' (MAT_VIEW)
0 INDEX MODE: ANALYZED (RANGE SCAN) OF
'BB_CODE_TABLE_I' (INDEX)
0 MAT_VIEW ACCESS MODE: ANALYZED (BY INDEX
ROWID) OF 'BB_CODE_TABLE' (MAT_VIEW)
0 INDEX MODE: ANALYZED (RANGE SCAN) OF
'BB_CODE_TABLE_I' (INDEX)
0 TABLE ACCESS MODE: ANALYZED (BY INDEX ROWID)
OF 'PS_BO_NAME' (TABLE)
0 INDEX MODE: ANALYZED (RANGE SCAN) OF
'PS_BO_NAME_IDX1' (INDEX)
0 TABLE ACCESS MODE: ANALYZED (BY INDEX ROWID) OF
'PS_RD_PERSON' (TABLE)
0 INDEX MODE: ANALYZED (RANGE SCAN) OF
'PS1RD_PERSON' (INDEX)
0 TABLE ACCESS MODE: ANALYZED (BY INDEX ROWID) OF
'PS_RF_GRP_MEMBER' (TABLE)
0 INDEX MODE: ANALYZED (RANGE SCAN) OF
'PSARF_GRP_MEMBER' (INDEX)
0 TABLE ACCESS MODE: ANALYZED (BY INDEX ROWID) OF
'PS_RF_PROVIDER_GRP' (TABLE)
0 INDEX MODE: ANALYZED (UNIQUE SCAN) OF
'PS_RF_PROVIDER_GRP' (INDEX (UNIQUE))
0 TABLE ACCESS MODE: ANALYZED (BY INDEX ROWID) OF
'PS_BO_NAME' (TABLE)
0 INDEX MODE: ANALYZED (RANGE SCAN) OF
'PS_BO_NAME_IDX1' (INDEX)
0 INDEX MODE: ANALYZED (RANGE SCAN) OF 'PS1RD_PERSON'
(INDEX)
0 TABLE ACCESS MODE: ANALYZED (BY INDEX ROWID) OF
'PS_RB_WORKER' (TABLE)
0 INDEX MODE: ANALYZED (UNIQUE SCAN) OF 'PS_RB_WORKER'
(INDEX (UNIQUE))

Firefox is using large amounts of CPU time and disk access, and I need to know how to shut down most of this so I can actually use the browser.

Firefox is a very busy piece of software. It's using large amounts of CPU time and disk access. It puts my usage at low priority, so I have to wait for some time to be able to use my pointer or keyboard. I don't know what it uses all that CPU and disk access time for, but it's of no use to me. It often takes off with massive use of resources when I'm not doing anything, and I may not have use of my pointer for several minutes. How can I shut down most of this so I can use the browser to get my work done. I just want to use the web site access part of the software, and drop all the extra. I don't want Firefox to be able to recover after a crash. I just want to browse with a minimum of interference from Firefox. I would think that this is the most commonly asked question.

Firefox consumes a lot of CPU resources
* https://support.mozilla.com/en-US/kb/Firefox%20consumes%20a%20lot%20of%20CPU%20resources
High memory usage
* https://support.mozilla.com/en-US/kb/High%20memory%20usage
Check and tell if its working.

Differences between "top 5 timed events" and "Top 5 Timed Foreground Events

Dear all,
i want to know what is the difference between "top 5 timed events" and "Top 5 Timed Foreground Events" in AWR reports
the meaning the same is?
thanks to all.

chijar wrote:
Dear all,
i want to know what is the difference between "top 5 timed events" and "Top 5 Timed Foreground Events" in AWR reports
the meaning the same is?
thanks to all.what is the difference between foreground & background sessions?

User I/O Wait class in Top 5 Timed Foreground Events

Hi Mates
In my awr report in Top 5 Timed Foreground Events, i get the below event list
Event     Waits     Time(s)     Avg wait (ms)     % DB time     Wait Class
DB CPU          25,721          58.29
db file sequential read     67,491,952     7,710     0     17.47     User I/O
db file scattered read     7,147,112     2,560     0     5.8     User I/O
log file sync     2,926,748     1,526     1     3.46     Commit
direct path read     342,745     834     2     1.89     User I/O
So does it means that there is a issue with disk I/O on my box. since the wait class is showing as User I/O.
I am running the single instance database with oracle version 11.2 on IBM AIX server.

huzaifa wrote:
Hi Mates
In my awr report in Top 5 Timed Foreground Events, i get the below event list
Event                              Waits       Time(s)       Avg wait (ms)     % DB time      Wait Class
DB CPU                                             25,721                               58.29
db file sequential read           67,491,952        7,710          0                         17.47      User I/O
db file scattered read           7,147,112        2,560          0                          5.8      User I/O
log file sync                           2,926,748        1,526          1                          3.46      Commit
direct path read                   342,745        834          2                          1.89      User I/OSo does it means that there is a issue with disk I/O on my box. since the wait class is showing as User I/O.
I am running the single instance database with oracle version 11.2 on IBM AIX server.Is this a standard one hour report on a machine with at least 8 CPUs available ?
If so then take a look at Dom Brooks comment - your average read times are in the range of 0.1 to 0.3 milliseconds - they're mostly coming out of filesystem cache (but maybe you have some very good database flashcache installed).
Your first move should probably be to take some of the memory from your file system cache and increase your buffer cache - this will probably decrease the number of reads reported and the amount of CPU used. I'd also look for statements that seem to be doing an unreasonable amount of I/O to get their end results, and check the "Segments by ... " section of the report to see which objects are seeing most I/O.
Before you mess about with ASM, you should simply check for easy ways to do less work.
Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com
Author: <b><em>Oracle Core</em></b>

I put songs onto my IPhone 4, and they show up under the "On This Phone" section in itunes, but when I go to play the songs on my phone, they aren't there. How can I fix this?

I put songs onto my IPhone 4, and they show up under the "On This Phone" section in itunes, but when I go to play the songs on my phone, they aren't there. How can I fix this?

When you look at your iPhone, are you looking in the Music app or in the iTunes app? Be sure you are looking in the Music app, and look in the Songs category. If your songs are not here, you may want to try syncing your information again through iTunes. To do this, uncheck "Sync Music" and then click apply or sync in the bottom right corner of iTunes, and then recheck "Sync Music" and then click apply or sync again.
I hope this helps!

Mail in 10.6.4 not usable: it consumes all CPU time and will not quit

Mail application does not work properly.
It eats up most of the available CPU time (till >300% on my machine), becomes unresponsive and will only quit when killed by a force quit in the Activity Monitor.
I have only two accounts set up. One Gmail account and a google apps one.
I used to synch with a Blackberry but now I synch directly through google apps.
The problem was sporadic at best at first but has become the usual behaviour now. Major change has been installing 10.6.4
I have switched to Thunderbird since Mail is not usable.
Tx for any hint on how to solve this issue

It seems to be a recurring issue with 10.6.4...there's probably not much mere mortals like us can do. I haven't found a solution. Try re-installing 10.6.4.

[ask]cpu time and disk i/o in tkprof

this is result of tkprof
1     call     count       cpu    elapsed       disk      query    current        rows
2     ------- ------ -------- ---------- ---------- ---------- ---------- ----------
3     Parse        1      0.00       0.00          0          0          0           0
4     Execute      1      0.00       0.00          0          0          0           0
5     Fetch     1001      2.55       5.46      49517      39884          0      100000
6     ------- ------ -------- ---------- ---------- ---------- ---------- ----------
7     total     1003      2.55       5.47      49517      39884          0      100000what is the relationship between the cpu time with the disk??

I mean, what effect the disk to cpu time?What is the effect of barometric pressure to water depth?
When all else fails, Read The Fine Manual
http://download.oracle.com/docs/cd/B19306_01/server.102/b14211/sqltrace.htm#PFGRF01040
code]
count = number of times OCI procedure was executed
cpu = cpu time in seconds executing
elapsed = elapsed time in seconds executing
disk = number of physical reads of buffers from disk
query = number of buffers gotten for consistent read
current = number of buffers gotten in current mode (usually for update)
rows = number of rows processed by the fetch or execute call
There is minimal relationship between "cpu time in seconds executing" for most SQL and "number of physical reads of buffers from disk".
CPU Times includes CPU activity other than working to complete physical reads of buffers from disk
Each measures in its own units based upon activity two different subsystem components.

Incorrect Alerts CPU Time and Average Response Time

BUG
My Alert on Web app is consistently behaving incorrectly.
If I set an alert to monitor CPU Time at threshold 1.5 seconds, it's actually set to 1.5 milliseconds even though the graph shows a dotted red line at 1.5 seconds. The alert will trigger at 1.5 milliseconds threshold. So, instead, I have to set threshold
to 1500 seconds - the graph is completely useless showing a red dotted line at ~24 mins but the alert does then go off when CPU time goes above 1500 ms (aka 1.5 seconds).
The original portal alert seems to be fine - this problem is on new portal only. Unaffected by browser type - all browsers do the same thing (Just has to be said before someone asks).
This seems to apply to all metrics using seconds (Average Response Time acts in the same way)

Hii...
Am sure you are much aware " Components Response Time spectrum"
########Analyzing Performance Problems#################
--High wait time: Insufficient number of free work processes
--High roll-wait time: Communication problem with GUI, external system,
or large amount of data requested
--High load and generation time: SAP buffers (Program, CUA or Screen)
too small
--High database request time: CPU/memory bottleneck on database server;
communication problem with database server, expensive SQL statements,
database locks, missing indexes, missing statistics or small database buffer(s)
--High CPU time: Expensive ABAP processing, for example, processing
large tables; inefficient programming
--Processing time more than twice CPU time: CPU bottlenecks
If time aloows look at
Note 0000008963 - Definition of SAP response time/processing time/CPU time
Rgds

What is a common cause for high sys CPU time and system faults on an Iplanet server?

Hi,
A newbie question...
I am benchmarking an application which uses Iplanet on Solaris (2X400mhz cpus). vmstat output follows.
Note the high sys time and relatively lower user mode time. Also relatively high system fault rate. Is this
normal? If not, common causes?
fyi - we are not running Java VM on this server.
I have TRUSS output showing kernal activity but dont want to post it here without some further guidance
on what if anything in it might be helpful.
Thanks!
Bernie
procs memory page disk faults cpu
r b w swap free re mf pi po fr de sr s0 s6 s7 s8 in sy cs us sy id
0 0 0 2494224 481536 3 10 3 0 0 0 0 1 0 1 0 413 697 443 1 2 97
0 0 0 2428464 414368 0 122 0 0 0 0 0 45 0 45 0 972 53598 575 5 28 67
1 0 0 2428512 414456 0 242 0 0 0 0 0 0 0 0 0 563 1368 756 4 46 50
0 0 0 2428440 414440 0 263 0 0 0 0 0 0 0 0 0 636 2229 1268 6 49 46
1 0 0 2428240 414264 10 253 0 0 0 0 0 6 0 6 0 692 176918 873 16 49 3

Hello
You can change the DB isolation level to Read uncommitted
http://technet.microsoft.com/en-us/library/ms378149(v=sql.110).aspx
or use WITH (NOLOCK)
I do use NOLOCK option for the dirty reads to avoid locks on the tables
Javier Villegas |
@javier_vill | http://sql-javier-villegas.blogspot.com/
Please click "Propose As Answer" if a post solves your problem or "Vote As Helpful" if a post has been useful to you

I am caught in bizarre situation my labview programee takes 100percent cpu time and creates a deadlock

i am communicating with java programme through data socket but labview creates problem

You might try putting a 50 msec delay somewhere in your program loop to give the CPU time to perform other tasks. With no delays in a LabVIEW program, it *will* hog all the CPU time.
Rob

TS2972 Apple TV (2) works great with everything BUT iTunes on my computer, AND I can turn Home Sharing Off and On multiple times and NOTHING show up under "shared" and NOTHING shows up under Computers on Apple TV???

My Apple TV (2) works fine with my iPad and iPhone.
My iTunes syncs with my iPad and iPhone.
I have turned "Home Sharing" off and on multiple times - of course using the same AppleID - and NOTHING shows up under Shared (and then Shared goes away) and NOTHING shows up under "Computers" on Apple TV?
Why aren't Apple TV and iTunes smart enought to work with each other on the same network? This should not be this difficult...

I think I am having the same problem.
My issue: since updating the software on ATV, I get an issue where shortly after starting a movie or video of some sort streaming from iTunes on my iMac the vid stops and Apple TV tells me that I need to connect to my Home Sharing account. Sometimes I can fix it by turning Home Sharing off and back on in my settings. Sometimes I need to completely reboot the AppleTV!
Any suggestions???

Javaw running SLOW / consuming inordinate CPU time and space

I recently got a new IBM thinkpad and have installed the latest version of Java on it. Applets run fine in the browser, but any Java application I run, for example opening the control panel for java, takes several minutes to open, and while this is happening, my CPU is running the javaw process at 97-100% capacity and consuming about 16-20MB of space.
Running other apps can take 5-10 minutes to launch. Once running, performance is faster, but still intolerably slow.
I have tried downgrading to a previous version of java and find the same performance issue.
Does anyone have any ideas as to what might be causing this performance issue?

I have a Thinkpad which is a couple of years old. It runs 1.4 fine.
My OS is win 98, and I had extra memory put in it to bring it up to a massive 98megs of ram.
I think the CPU is something like 4-600mhz. (as I said, ancient).
Something is wrong with your Thinkpad, either hardware, or software configuration.
Oh wait! It's IBM! Of course it is farked!
My story:
13 months after purchase: harddrive completely fails.
IBM's response -> "you had a 12 month warranty only... sux to be you"
(Nb: I don't travel with the laptop... 99.9% of the time it sits there in one place and pretends to be a desktop, it gets considerably less wear and tear than a normal laptop would)
So I replace the harddrive and soldier on.
Eventually I upgrade to the latest version of Netbeans.
Which promptly stops working, and futzes with the OS so that the previous
versions of Netbeans won't work either (oh wait, this rant is supposed to
be about IBM) (point was, I don't have enough ram to run Netbeans, but
every other Java program runs fine - including some which factorise
large near primes.... 60 bits is a challenge, 40 bits is near instantaneous)
Towards the end of last year the side of my laptop screen chipped... and then
the chip became a crack, and now it is a gaping crack. (Before it got too bad)
I took it to an IBM repair place and they said 'oh yes, that's very common'.
Apparently they only reinforce one side of the laptop screen...
The good news is I've upgraded to an eMac, and am currently a happy camper.
Of course, I'm having trouble getting the data off the laptop, because the braindead
version of the windows disk IBM included doesn't let me install new hardware (not
entirely true - I was able to install a USB mouse with it... woohoo.).
I've hooked up a keyboard to the serial port (which was why I needed to move the mouse over to USB)
but... it keeps dropping out because the serial port is loose or badly connected or something.
The one time I tried using a network card in the expansion slot it of course failed to
install properly (see #$%$#^@ windows disk)... after a week of trying different things
it got stuck in the slot, and the slot broke when I pulled it out.
The laptop is nearly completely stuffed, and falling apart...
BUT JAVA STILL RUNS LIKE A GURU ON PRUNE JUICE!!!
It runs like the Silver Surfer runs from Galactus when he gets that look in his eye and pulls out the jar of crunchy peanut butter.
It runs like Jesse Owens at a KKK conference.
Java is in fact the only reason I haven't set up a catapult to send the #$^#%&$ laptop
through the office window of the local head of IBM with a note wrapped around it saying
"warranty this, #@$^$%^head!!!!".
(Actually, if it wasn't for Java, I'd have thrown the thing out the window long since)
IBM how I despise thee. I loathe thee with a passion.
We hates it we does. Filthy IBM, nasty IBM.

Genius updating taking 100%+ CPU time and error 13011

Does anyone else have the issue of iTunes updating Genius causing their CPU usage to max out run the cooling fan at full speed?
Im getting an average of 100%+ CPU usage while its updating or compiling or whatever its doing and Macbook cooks whiles its doing so.
Activity Monitor is reporting ridiculously high CPU usage. How do you even get 108% CPU usage?? Can someone explain that for me?
Im also getting the message 'unable to save library' with error 13011 at the end of Genius updating (the Genius update progress bar is full).
Can anyone give me some pointers as to what I can do to check why i'm getting these issues or if there is resolution?
Killing the Genius data gathering solves the CPU usage issue straight away but I'm sure it wasnt this bad before Snow Leopard.
Cheers
AC

here is a log of the console messages relating to itunes if that helps anyone...
11/09/09 8:22:24 AM [0x0-0x1cd1cd].com.apple.iTunes[4459] objc[4459]: Class DOMHTMLParamElement is implemented in both /System/Library/Frameworks/WebKit.framework/Versions/A/Frameworks/WebCore.frame work/Versions/A/WebCore and /Library/InputManagers/SafariBlock/SafariBlock.bundle/Contents/MacOS/SafariBloc k. One of the two will be used. Which one is undefined.
11/09/09 8:22:24 AM [0x0-0x1cd1cd].com.apple.iTunes[4459] objc[4459]: Class WebBaseNetscapePluginView is implemented in both /System/Library/Frameworks/WebKit.framework/Versions/A/WebKit and /Library/InputManagers/SafariBlock/SafariBlock.bundle/Contents/MacOS/SafariBloc k. One of the two will be used. Which one is undefined.
11/09/09 8:22:26 AM Firewall[65] iTunes is listening from 0.0.0.0:3689 proto=6
11/09/09 8:22:27 AM Firewall[65] iTunes is listening from :::3689 proto=6
11/09/09 8:22:27 AM [0x0-0x1cd1cd].com.apple.iTunes[4459] Child process initialized.
11/09/09 8:22:28 AM /Applications/iTunes.app/Contents/MacOS/iTunes[4459] dnssd_clientstub read_all(49) failed -1/4 9 Bad file descriptor
11/09/09 8:22:28 AM /Applications/iTunes.app/Contents/MacOS/iTunes[4459] dnssd_clientstub read_all(49) failed -1/4 9 Bad file descriptor
11/09/09 8:22:28 AM /Applications/iTunes.app/Contents/MacOS/iTunes[4459] dnssd_clientstub read_all(45) failed -1/4 9 Bad file descriptor
11/09/09 8:22:28 AM /Applications/iTunes.app/Contents/MacOS/iTunes[4459] dnssd_clientstub DNSServiceRefDeallocate called with invalid DNSServiceRef 0x1a808680 FFFF0004 DDDDDDDD
11/09/09 8:22:28 AM /Applications/iTunes.app/Contents/MacOS/iTunes[4459] dnssd_clientstub DNSServiceRefDeallocate called with invalid DNSServiceRef 0x1a8025a0 00000000 80000000
11/09/09 8:22:28 AM /Applications/iTunes.app/Contents/MacOS/iTunes[4459] dnssd_clientstub DNSServiceRefDeallocate called with invalid DNSServiceRef 0x1a8025e0 00000001 18B96E00

Unknown SQL eating CPU time and library cache locks

Hello everyone,
we are seeing a lot of activity when opening new connections to the database from PHP web server and the time is being spent on a SQL which in Enterprise manager is reported as UNKNOWN and selecting the GV$SQL view for this sql_id yields nothing, the SQL is not there. We do not have any logon triggers.
I was wondering, if I know this SQL_ID (it's "c5brdpybgqss6"), can I see what it actually does? Can I trace it somehow?
Our environment is:
Oracle Database 11g Release 11.1.0.7.0 - 64bit Production
With the Real Application Clusters option
Two RAC instances, running RedHat ES 5 64bit
Clients are PHP, using oci8, using Instant Client 11.1.0.7
Thanks for any ideas how to further analyze this,
Michal.

Unfortunately no, it is NULL (see below). I tried metalink, but I don't know what to search for. I'll probably have to file a ticket with the support.
select username, sid, serial#, status, sql_id, prev_sql_id, event, seconds_in_wait
from gv$session
where sql_id='c5brdpybgqss6'
order by username, sid, serial#;
USERNAME SID SERIAL# STATUS SQL_ID PREV_SQL_ID EVENT SECONDS_IN_WAIT
IMWC2 945 64434 ACTIVE c5brdpybgqss6 latch: shared pool 5
IMWC2 1020 38821 ACTIVE c5brdpybgqss6 library cache lock 2
973 7519 ACTIVE c5brdpybgqss6 class slave wait 0
992 20 ACTIVE c5brdpybgqss6 EMON slave idle wait 3
1004 5 ACTIVE c5brdpybgqss6 EMON slave idle wait 5
1006 1195 ACTIVE c5brdpybgqss6 EMON slave idle wait 3
1014 2635 ACTIVE c5brdpybgqss6 EMON slave idle wait 3
1020 2755 ACTIVE c5brdpybgqss6 EMON slave idle wait 3
1026 3967 ACTIVE c5brdpybgqss6 EMON slave idle wait 2
1027 3039 ACTIVE c5brdpybgqss6 EMON slave idle wait 2
1042 805 ACTIVE c5brdpybgqss6 EMON slave idle wait 3
1044 481 ACTIVE c5brdpybgqss6 EMON slave idle wait 3
1046 300 ACTIVE c5brdpybgqss6 EMON slave idle wait 1
1053 2 ACTIVE c5brdpybgqss6 Streams AQ: waiting for time management or cleanup tasks 209637
1055 8 ACTIVE c5brdpybgqss6 Streams AQ: emn coordinator idle wait 4
1056 10 ACTIVE c5brdpybgqss6 Streams AQ: emn coordinator idle wait 0
1059 6 ACTIVE c5brdpybgqss6 Streams AQ: waiting for time management or cleanup tasks 0

CPU TIME and DB CPU events under TOP 5 TIMED FOREGROUND EVENTS section in AWR report

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