Kernel_task consumes a lot of CPU

Hello!
I have MacBook Pro 5,5 with Mac OS 10.6.8.
It always slows down during charging and periodically when it works on a battery.
I have analyzed threads with Shark and it shows that AppleIntelCPUPowerManagement::~AppleIntelCPUPowerManagement eats ~80% of CPU (total 200%).
When I took system to sleep mode then waked it up, all works fine for some time (10-20 seconds), but then it again slows down.
Resetting SCM doesn't help.
How could I solve this problem?

Fixing kernel_task overloding your computer!!!
Use this at your own risk. It worked for me.
Basic Procedure:
1- Click in the apple logo on the upleft corner, select "About This Mac".
2- Click in "More Info".
3- Click in "System Report".
4- Take note of "Model Identifier".
5- Create a new folder called "Recovery_Kernel_Task".
6- Select Macintosh HD/System/Library/Extensions/IOPlatformPluginFamily.kext
7- Click the mouse right button at that file and select "Show Package Contents"
8- Open the folder Contents/Resources.
9- Look for the Model Identifier in step 4.
10- Move the file to the folder you've created, if you need to restore the file.
11- Check the folder in step 8 has 49 files instead of 50 (original files).
12- Restart the computer and be happy!

Similar Messages

EA1 - consumes a lot of CPU

New 2.1.0.62 EA1 consumes a lot of CPU on my Macbook with MacOS 10.6.1.
After I have opened two database connections (Oracle) everything seems to be fine (CPU usage 2% and below), but after I have executed some sql statements I will never get below 7% of CPU usage. It gets even worse the longer you work with SQL Developer (> 25 %).
The statements I have executed did not have many rows (< 100) and do not take long (< 1 s).
Regards,
Sven

Hi Barry,
sorry haven't seen that you have edited this thread. Yes, for me it is still the case. I just updated to 2.1 final release and am testing. I am using SQL developer for 40 minutes now and it is consuming 24-25% of the CPU(s). ... after 2 hours of work it is at 35-36%.
Is there any tool that I can use to track this issue down or any information that I can send you? The suggested "topthreads" does not work here :-(
Regards,
Sven
Edited by: The terrible Sven on Dec 17, 2009 4:47 PM

The SELECT .... DISTINCT TOKEN_TEXT... consumes a lot of CPU.

RDBMS: 10.1.0.5.0
Today, our db stopped to work.
The load of the system (top) was 16 and the AWR report says that the top SQL (SQL ordered by CPU Time) is:
SELECT
/*+INDEX(T "DR$DBY_DB_DATA_IX$X")*/
DISTINCT TOKEN_TEXT
FROM "DR$DBY_DB_DATA_IX$I" T
WHERE TOKEN_TEXT LIKE :lkexpr ESCAPE '\'
AND (TOKEN_TYPE IN (0, 4, 6, 604)
OR (TOKEN_TYPE BETWEEN 16 AND 74)
OR (TOKEN_TYPE BETWEEN 616 AND 674))What is it?

Hi Barry,
sorry haven't seen that you have edited this thread. Yes, for me it is still the case. I just updated to 2.1 final release and am testing. I am using SQL developer for 40 minutes now and it is consuming 24-25% of the CPU(s). ... after 2 hours of work it is at 35-36%.
Is there any tool that I can use to track this issue down or any information that I can send you? The suggested "topthreads" does not work here :-(
Regards,
Sven
Edited by: The terrible Sven on Dec 17, 2009 4:47 PM

T420s: Conexant Audio Message Service consumes a lot of CPU time in Windows 8

Hi,
I have here two models of T420s running Windows 7 and Windows 8.
The Windows 7 model is quiet and the Service Needs no cpu time during idle.
The Windows 8 model is noisy (the fan is Spinning) and the Conexant Audio Message Service (Version 1.6.0.0) is consuming 30% of cpu during idle.
Any suggestions?
Solved!
Go to Solution.

Pretty sure you can just disable the service. I did on my W520 with no ill effects.
W520: i7-2720QM, Q2000M at 1080/688/1376, 21GB RAM, 500GB + 750GB HDD, FHD screen
X61T: L7500, 3GB RAM, 500GB HDD, XGA screen, Ultrabase
Y3P: 5Y70, 8GB RAM, 256GB SSD, QHD+ screen

Kernel_task consumes a lot of real memory

(I do not speak english, all translated by google. Sorry.)
The process "kernel_task" of my MacBook Air is always occupying a lot of "Real Memory", always up to 1.5GB. Why? How can I solve?
Thanks and sorry bad english.

Read this document.
http://reviews.cnet.com/8301-13727_7-20091848-263/kernel-task-taking-up-ram-in-o s-x/

Swing consumes a lot of cpu?

I developed model server-client application. Up to 100 or more clients can manipulate small random access file simultaneously locally or remotely. When I run the program in testing mode without gui, with a lot of logging to many files and to standard output too, with a lot of threads madly trying to corrupt my file, I can hardly see task manager reacting. When I test my application with gui (server has small console) and client has rather complicated ui, even if i do not do anything, task manager shows cpu usage 98%. If i am doing something and gui must repaint (very little), it's painfull to watch. The frame or/and its children are repainting in patches intersecting each other and cpu usage is just hovering. What does it do? I have xp pro, powerful comp. and a lot of memory. I have to work in jdk 1.3 at this moment.
What I supposed to do? Why does it stink so badly?
Will be glad to any hints.

Thank you. SwingWorker is my long time favorite. I am using it since its first release. I also would recommend it to anybody.
I ran a profile on the program with -Xprof flag.
Honestly, I am not good at interpreting it. If anybody happens to see anything of value, please point out.
==========================profile(partial)=============================
Flat profile of 1.18 secs (116 total ticks): Thread-6
Interpreted + native MethodClient 06956716 is disconnecting
Reservation records for client: 06956716
Record 21: 5 reserved
Connection to client 06956716 was terminated
50.0% 0 + 2 java.awt.EventQueue.postEventPrivate
25.0% 0 + 1 java.awt.EventQueue.invokeLater
75.0% 0 + 3 Total interpreted
Thread-local ticks:
96.6% 112 Blocked (of total)
25.0% 1 Unknown: thread_state
Flat profile of 60.74 secs (4251 total ticks): AWT-Windows
Interpreted + native Method
99.5% 0 + 4224 sun.awt.windows.WToolkit.eventLoop
0.1% 2 + 2 sun.awt.PostEventQueue.postEvent
0.0% 2 + 0 java.awt.event.MouseEvent.<init>
0.0% 2 + 0 sun.awt.SunToolkit.targetToAppContext
0.0% 2 + 0 java.awt.AWTEvent.<init>
0.0% 0 + 1 sun.awt.windows.WToolkit.init
0.0% 0 + 1 java.lang.Object.notifyAll
0.0% 1 + 0 java.awt.event.KeyEvent.<init>
0.0% 0 + 1 java.lang.Object.hashCode
0.0% 1 + 0 java.lang.Terminator$1.<init>
0.0% 0 + 1 sun.awt.windows.WToolkit.run
0.0% 1 + 0 java.util.HashMap.get
99.9% 11 + 4230 Total interpreted
Thread-local ticks:
0.2% 7 Blocked (of total)
0.0% 2 Interpreter
0.0% 1 Unknown: running frame
Flat profile of 0.08 secs (8 total ticks): Thread-0
Interpreted + native Method
87.5% 0 + 7 sun.awt.windows.WToolkit.shutdown
87.5% 0 + 7 Total interpreted
Thread-local ticks:
12.5% 1 Unknown: thread_state
Flat profile of 11.60 secs (1140 total ticks): RMI ConnectionExpiration-[127.0.
.1:3092]
Thread-local ticks:
99.5% 1134 Blocked (of total)
100.0% 6 Unknown: thread_state
Flat profile of 26.07 secs (2555 total ticks): Thread-5
Thread-local ticks:
99.9% 2553 Blocked (of total)
100.0% 2 Unknown: thread_state
Flat profile of 26.48 secs (2591 total ticks): Logger #5393983
Thread-local ticks:
99.9% 2589 Blocked (of total)
100.0% 2 Unknown: thread_state
Flat profile of 26.63 secs (2604 total ticks): RMI LeaseChecker
Thread-local ticks:
100.0% 2603 Blocked (of total)
100.0% 1 Unknown: thread_state
Flat profile of 26.64 secs (2605 total ticks): RMI TCP Connection(4)-127.0.0.1
Interpreted + native Method
97.5% 0 + 2534 java.net.SocketInputStream.socketRead
0.5% 0 + 12 java.net.SocketOutputStream.socketWrite
0.2% 0 + 5 java.lang.Class.getConstructor0
0.2% 0 + 4 java.io.Win32FileSystem.getBooleanAttributes
0.1% 0 + 3 pushkinserver.DatabaseManager.openDatabase
0.1% 0 + 3 java.io.FileOutputStream.writeBytes
0.1% 0 + 2 java.io.Win32FileSystem.getLength
0.1% 0 + 2 java.lang.Class.forName0
0.1% 2 + 0 java.text.DecimalFormat.format
0.1% 0 + 2 java.lang.Class.newInstance0
0.0% 0 + 1 java.io.FileInputStream.readBytes
0.0% 0 + 1 java.lang.Class.getMethod0
0.0% 1 + 0 java.lang.Exception.<init>
0.0% 0 + 1 java.lang.ClassLoader.defineClass0
0.0% 1 + 0 sun.misc.URLClassPath$6.getContentLength
0.0% 0 + 1 sun.misc.URLClassPath$6.getInputStream
0.0% 1 + 0 java.lang.ref.SoftReference.get
0.0% 0 + 1 java.beans.VetoableChangeSupport.addVetoableChangeList
ner
0.0% 0 + 1 java.io.ObjectStreamClass.getFieldIDs
0.0% 0 + 1 suncertify.db.LocalizedMessage.getResourceString
0.0% 1 + 0 java.text.MessageFormat.<init>
0.0% 0 + 1 java.io.BufferedWriter.<init>
0.0% 0 + 1 concurrent.LockManager.<init>
0.0% 0 + 1 java.lang.ClassLoader.findBootstrapClass
0.0% 0 + 1 pushkinserver.db.DataInMemory.initLockManagers
99.9% 16 + 2581 Total interpreted (including elided)
Compiled + native Method
0.1% 2 + 0 sun.security.provider.SHA.computeBlock
0.1% 2 + 0 Total compiled
Thread-local ticks:
0.2% 5 Blocked (of total)
0.0% 1 Class loader
Flat profile of 56.66 secs (3853 total ticks): Screen Updater
Interpreted + native Method
100.0% 0 + 24 sun.awt.PostEventQueue.postEvent
100.0% 0 + 24 Total interpreted
Thread-local ticks:
99.4% 3829 Blocked (of total)
Flat profile of 59.46 secs (4132 total ticks): Thread-2
Thread-local ticks:
100.0% 4132 Blocked (of total)
Flat profile of 60.96 secs (4272 total ticks): EventQueueMonitor-ComponentEvtDi
patch
Interpreted + native Method
18.2% 1 + 1 com.sun.java.accessibility.util.ComponentEvtDispatchTh
ead.run
18.2% 2 + 0 com.sun.java.accessibility.util.EventQueueMonitor.upda
eCurrentMousePosition
18.2% 0 + 2 sun.awt.windows.WComponentPeer.getLocationOnScreen
9.1% 1 + 0 java.awt.Component.getNativeContainer
9.1% 0 + 1 java.awt.Component.getLocationOnScreen
9.1% 0 + 1 java.lang.Object.wait
81.8% 4 + 5 Total interpreted
Thread-local ticks:
99.7% 4261 Blocked (of total)
9.1% 1 Interpreter
9.1% 1 Unknown: thread_state
Flat profile of 61.01 secs (4278 total ticks): SunToolkit.PostEventQueue-0
Interpreted + native Method
47.1% 0 + 33 java.lang.Object.wait
28.6% 3 + 17 java.awt.EventQueue.postEventPrivate
7.1% 4 + 1 sun.awt.PostEventQueue.run
2.9% 0 + 2 java.awt.EventQueue.postEvent
1.4% 1 + 0 java.awt.Toolkit.getDefaultToolkit
1.4% 1 + 0 java.awt.EventQueueItem.<init>
1.4% 1 + 0 sun.awt.SunToolkit.flushPendingEvents
1.4% 1 + 0 sun.awt.PostEventQueue.flush
91.4% 11 + 53 Total interpreted
Stub + native Method
2.9% 0 + 2 java.lang.Object.notifyAll
1.4% 0 + 1 java.lang.Thread.currentThread
4.3% 0 + 3 Total stub
Thread-local ticks:
98.4% 4208 Blocked (of total)
2.9% 2 Unknown: running frame
1.4% 1 Unknown: thread_state
Global summary of 61.38 seconds:
100.0% 6045 Received ticks
2.7% 163 Received GC ticks
6.3% 380 Compilation
0.1% 9 Other VM operations
0.5% 30 Class loader
0.1% 4 Interpreter
0.4% 27 Unknown code

Dhcpcd consumes a lot of CPU when wireless switch is off

If I turn my hardware wireless switch off, dhcpcd goes crazy and uses a CPU core completely. Checking with htop, the command being run is:
dhcpcd -4qL -t 30 wlp13s0
where wlp13s0 is my wireless interface. I'm using netctl-auto to connect to the network.
It goes back to normal as soon as I turn the switch back on.
The network configuration under /etc/netctl to which it was connected before I turned the switch off is
Description='Automatically generated profile by wifi-menu'
Interface=wlp13s0
Connection=wireless
Security=wpa
ESSID="network"
IP=dhcp
Key="password"
Is there anything I can do so that dhcpcd won't try to use all my CPU in such cases?
EDIT (2014.05.28):
I looked in the following wiki pages, but couldn't find anything about this issue:
https://wiki.archlinux.org/index.php/Br … leshooting
https://wiki.archlinux.org/index.php/Dhcpcd
https://wiki.archlinux.org/index.php/Ne … figuration
https://wiki.archlinux.org/index.php/Netctl
I couldn't find anything about dhcpcd and cpu usage in the forums, and searching the web didn't provide any relevant results. Which is bad, since anatolik found this:
https://bugs.archlinux.org/task/39512
which I didn't.
Last edited by mgmillani (2014-05-28 11:07:02)

ondoho wrote:Have you tried connecting to the network manually, then pressing the switch?
If I turn the switch on after turning it off, I must connect manually using netctl (that is, netctl-auto doesn't connect automatically in this case). After doing that, turning the switch back off does not cause the problem. Which is weird, since the process is still there, like before
I also noticed that it is no longer possible to use netctl-auto after turning the switch off, as it no longer see any configuration (running `netctl-auto list` as root returns nothing, while before it returned 2 items).
ondoho wrote:how did you install and activate wireless
I basically followed this wiki page:
https://wiki.archlinux.org/index.php/Ne … f_profiles
I first generated the profiles with wifi-menu and by copying /etc/netctl/examples/ethernet-dhcp, and then activated netctl-auto using
# systemctl enable [email protected]
# systemctl enable [email protected]
ondoho wrote:wht is your (wireless) hardware
My wireless hardware (according to lspci) is:
0d:00.0 Network controller: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter (rev 01)
ondoho wrote:once you know these things, search the wiki, the forums, the web.
[ in case you have done this already please include it in your first post, otherwise we must assume you didn't. ]
Included in the first post now.
anatolik wrote:I suspect you see this bug https://bugs.archlinux.org/task/39512
Yes, it looks very similar. It is said there that the problem should be fixed since 2014-04-01 11:48:57, but I just checked for updates with pacman and I already have the most recent version (6.3.2). I will see if I can add any relevant information to that page.
I did notice that my wireless interface disappears when I turn the switch off (ifconfig doesn't show it anymore), and it only reappears when I reconnect manually. I'm not sure if that is expected, since the commit that should have solved the problem says:
On a read error, remove the FD from eloop. This shouldn't happen really

Firefox consumes a lot of CPU resources after some time

Hi,
I've upgraded from Firefox 3.5.16 to Firefox 5.0 on Linux i386 with 512 MB RAM. Everything is working fine until after "some time" (don't know the exact time period) the CPU load increases to 100%, my average system load explodes and the system is swapping memory wildly. This suddenly happens, even if Firefox is in the background while I'm working on different things. So it does not belong to any memory-hungry stuff like Flash pages or JavaScript sites.
I don't think the problem is caused by my extensions (adblock, noscript, multifox, tabloc) or plugins (mplayer/Flash) either.
I think it is the Javascript Garbage Collector. I could tweak its cycle time in about:config, but this would just be work around the problem.
Note that I usually have many open (app) tabs that extensively use Javascript and AJAX.
I really like the new Firefox features, but I haven't expected that "5.0" stands for 5.0 average system load. Sorry couldn't resist that remark ;D
bcctr

I updated to Firefox Aurora this morning. Problems seem to be solved. Thank you!

Need an app/lib that consume a lot of CPU

Currently designing a light java middleware to work on clusters and grids, I need a java application to load the CPU usage of the computers. Is there something available somewhere ?
Thanks.

Why does it have to be "something more interesting" if the only goal is to produce CPU load??

Why Firefox Has Spikes In CPU Usage And Consumes A Lot Of RAM Since Security Update?

After applying security update 3.6.18 i started having this problem. I had this problem earlier but it only happened after several days Firefox was opened constantly. Now i have this problem several hours later after launching Firefox.
[http://i.stack.imgur.com/PJmH5.png '''Here is a picture of high RAM usage''']
'''[http://i.stack.imgur.com/tjsqt.png Here is a picture of high RAM and CPU usage]'''
I have Flash disabled.
What is going on? Should i reinstall Firefox 3.6.18?

Have you any particular reason for using an older version of Firefox.
Whilst I rarely use firefox 3.6 now, and do not know the answer I will comment that the now unsupported firefox 4 did have bad memory problems in some cases. Some of those problems were addressed in firefox 5, and others are addressed in Firefox 7, which is due out on the Aurora channel next week.
You could consider upgrading to a newer version of firefox. If you need firefox3.6 only for limited use you could consider using Firefox portable, alongside a newer version of Firefox.
* portable: http://portableapps.com/apps/internet/firefox_portable/localization#legacy36
* see also
**[[installing a previous version of firefox]]
**[[high memory usage]]
**[[firefox consumes a lot of CPU resources]]

Why Firefox 5.0 Still Consumes A Lot Of RAM?

Contrary to many statements that Firefox 5.0 is RAM optimized and uses less, i still have Firefox eating '''[http://i.stack.imgur.com/i1AgT.png almost ~800MB of RAM and mapping more]'''.
I used command:
''about:memory''
And was presented with a modules/extension tree and i don't understand what each means. Does anybody here have experience or knowledge about this here who could tell me where may be the problem?

Have you any particular reason for using an older version of Firefox.
Whilst I rarely use firefox 3.6 now, and do not know the answer I will comment that the now unsupported firefox 4 did have bad memory problems in some cases. Some of those problems were addressed in firefox 5, and others are addressed in Firefox 7, which is due out on the Aurora channel next week.
You could consider upgrading to a newer version of firefox. If you need firefox3.6 only for limited use you could consider using Firefox portable, alongside a newer version of Firefox.
* portable: http://portableapps.com/apps/internet/firefox_portable/localization#legacy36
* see also
**[[installing a previous version of firefox]]
**[[high memory usage]]
**[[firefox consumes a lot of CPU resources]]

Query identified as OracleOEM reporting a lot of CPU wait time

We use "Ignite" by Confio to monitor the wait time on our database and I have been watching a query for a while now and it seems to be consuming a lot of resources for what it is doing.
This is the query:
/* OracleOEM */
SELECT m.tablespace_name,
m.used_percent,
(m.tablespace_size - m.used_space)*t.block_size/1024/1024 mb_free
FROM dba_tablespace_usage_metrics m,
dba_tablespaces t,
v$parameter p
WHERE p.name='statistics_level'
AND p.value!='BASIC'
AND t.tablespace_name = m.tablespace_name
And this is the execution plan:
SELECT STATEMENT Optimizer=ALL_ROWS (Cost=152 Cardinality=17 Bytes=2193)
NESTED LOOPS (Cost=152 Cardinality=17 Bytes=2193)
NESTED LOOPS (Cost=152 Cardinality=17 Bytes=2125)
MERGE JOIN (CARTESIAN) (Cost=149 Cardinality=17 Bytes=1785)
HASH JOIN (Cost=2 Cardinality=1 Bytes=49)
FIXED TABLE (FULL) OF X$KSPPI (TABLE (FIXED)) (Cost=1 Cardinality=1 Bytes=31)
FIXED TABLE (FULL) OF X$KSPPCV (TABLE (FIXED)) (Cost=1 Cardinality=1897 Bytes=34146)
BUFFER (SORT) (Cost=148 Cardinality=502 Bytes=28112)
VIEW OF DBA_TABLESPACE_USAGE_METRICS (VIEW) (Cost=147 Cardinality=502 Bytes=28112)
SORT (UNIQUE) (Cost=147 Cardinality=502 Bytes=19122)
UNION-ALL
SORT (AGGREGATE) (Cardinality=1 Bytes=8)
TABLE ACCESS (BY INDEX ROWID) OF RECYCLEBIN$ (TABLE) (Cost=4 Cardinality=389 Bytes=3112)
INDEX (RANGE SCAN) OF RECYCLEBIN$_TS (INDEX) (Cost=1 Cardinality=388)
SORT (AGGREGATE) (Cardinality=1 Bytes=14)
FIXED TABLE (FULL) OF X$KTFBHC (TABLE (FIXED)) (Cost=0 Cardinality=1 Bytes=14)
SORT (AGGREGATE) (Cardinality=1 Bytes=8)
TABLE ACCESS (BY INDEX ROWID) OF RECYCLEBIN$ (TABLE) (Cost=4 Cardinality=389 Bytes=3112)
INDEX (RANGE SCAN) OF RECYCLEBIN$_TS (INDEX) (Cost=1 Cardinality=388)
SORT (AGGREGATE) (Cardinality=1 Bytes=14)
FIXED TABLE (FULL) OF X$KTFBHC (TABLE (FIXED)) (Cost=0 Cardinality=1 Bytes=14)
HASH (GROUP BY) (Cost=89 Cardinality=500 Bytes=19000)
MERGE JOIN (Cost=87 Cardinality=500 Bytes=19000)
TABLE ACCESS (CLUSTER) OF TS$ (CLUSTER) (Cost=86 Cardinality=426 Bytes=9372)
INDEX (FULL SCAN) OF I_TS# (INDEX (CLUSTER)) (Cost=1 Cardinality=1)
SORT (JOIN) (Cost=1 Cardinality=501 Bytes=8016)
FIXED TABLE (FULL) OF X$KTTEFINFO (TABLE (FIXED)) (Cost=0 Cardinality=501 Bytes=8016)
HASH (GROUP BY) (Cost=52 Cardinality=1 Bytes=38)
NESTED LOOPS (Cost=50 Cardinality=1 Bytes=38)
FIXED TABLE (FULL) OF X$KTTEFINFO (TABLE (FIXED)) (Cost=0 Cardinality=251 Bytes=4769)
TABLE ACCESS (CLUSTER) OF TS$ (CLUSTER) (Cost=1 Cardinality=1 Bytes=19)
INDEX (UNIQUE SCAN) OF I_TS# (INDEX (CLUSTER)) (Cost=1 Cardinality=1)
HASH (GROUP BY) (Cost=5 Cardinality=1 Bytes=84)
HASH JOIN (Cost=3 Cardinality=1 Bytes=84)
NESTED LOOPS
NESTED LOOPS (Cost=3 Cardinality=1 Bytes=65)
HASH JOIN (Cost=2 Cardinality=1 Bytes=49)
FIXED TABLE (FULL) OF X$KSPPI (TABLE (FIXED)) (Cost=1 Cardinality=1 Bytes=31)
FIXED TABLE (FULL) OF X$KSPPCV (TABLE (FIXED)) (Cost=1 Cardinality=1899 Bytes=34182)
INDEX (UNIQUE SCAN) OF I_TS1 (INDEX (UNIQUE)) (Cost=1 Cardinality=1)
TABLE ACCESS (BY INDEX ROWID) OF TS$ (CLUSTER) (Cost=1 Cardinality=1 Bytes=16)
FIXED TABLE (FULL) OF X$KTTEFINFO (TABLE (FIXED)) (Cost=0 Cardinality=251 Bytes=4769)
TABLE ACCESS (BY INDEX ROWID) OF TS$ (CLUSTER) (Cost=1 Cardinality=1 Bytes=20)
INDEX (UNIQUE SCAN) OF I_TS1 (INDEX (UNIQUE)) (Cost=1 Cardinality=1)
FIXED TABLE (FIXED INDEX) OF X$KCFISTSA (ind:1) (TABLE (FIXED)) (Cost=0 Cardinality=1 Bytes=4)
My question is two fold... does anybody know where in OEM you can control the execution of this query? I would like to reduce the frequency it is run, or if that is not a good idea does anybody have any ideas from a tuning perspective?
Ignite is reporting 1,440 executions, 621,776,455 buffer gets, and 2 hours of CPU wait time per day.
Thanks in advance,
Zack

A typical question for this forum.
We use Oracle, we can't remember which version, and we can't be bothered to post it.
We don't know Oracle, so we use a third party product (Ignite from Confio) to perform redundant monitoring on our databases, which is already being performed by Oracle Enterprise Manager, for free.
Instead of trying to use the products which come with Oracle, we would like to wreck functionality, by tampering with things like frequency, and/or even adjusting Oracle provided queries, consequently invalidating our support contract for Oracle.
And, no, we are not aware, provided the database is doing nothing, queries like this one will automatically surface in the list of top <n> queries.
I would suggest you start to learn Oracle and dump Ignite. It is of no use to monitor your database with two tools, and OEM is fully integrated in Oracle.
Sybrand Bakker
Senior Oracle DBA

My mac is slow, the movies run slowly, the kernel_task consumes 463,3 MB of memory, how can I fix this?

My mac is slow, the movies run slowly, the kernel_task consumes 463,3 MB of memory, how can I fix this?
The problem started a few weeks ago with a small decrease in speed, and the videos now crash while the sound remains normal. When I open the Finder or any file it seems that I'm opening the windows with the hourglass spinning. I've already cleaned temporary, removed everything that was saved on the table, I made up for the mountain lion. I have a Mac 27-inch, 3.06 GHz processor Intel Core 2 Duo, Memory 4 GB 1067 MHz DDR3, ATI Radeon HD 4670 256 MB, Software OS X 10.8. With space on the HD.
Cópia do monitor de atividades
0           kernel_task          root          1,1          76          394,5 MB          Intel (64 bits)
248           Conteúdo da Internet do Safari          silvanalahutte          0,0          9          128,4 MB          Intel (64 bits)
282           Mail          silvanalahutte          4,4          12          99,2 MB          Intel (64 bits)
247           Safari          silvanalahutte          0,0          13          68,1 MB          Intel (64 bits)
173           Dock          silvanalahutte          0,0          3          63,3 MB          Intel (64 bits)
35           mds          root          0,2          6          61,2 MB          Intel (64 bits)
89           WindowServer          _windowserver          1,9          5          53,2 MB          Intel (64 bits)
252           Flash Player (plug-in de Internet do Safari)          silvanalahutte          0,3          6          27,0 MB          Intel (64 bits)
275           Monitor de Atividade          silvanalahutte          3,0          4          21,1 MB          Intel (64 bits)
39           loginwindow          silvanalahutte          0,0          2          20,9 MB          Intel (64 bits)
60           coreservicesd          root          0,0          4          20,3 MB          Intel (64 bits)
195           Central de Notificações          silvanalahutte          0,0          3          19,6 MB          Intel (64 bits)
159           universalaccessd          silvanalahutte          0,0          5          19,4 MB          Intel (64 bits)
170           SystemUIServer          silvanalahutte          0,0          4          19,3 MB          Intel (64 bits)
269           mdworker          silvanalahutte          0,2          4          17,9 MB          Intel (64 bits)
174           Finder          silvanalahutte          0,0          4          16,0 MB          Intel (64 bits)
222           com.apple.dock.extra          silvanalahutte          0,0          2          14,4 MB          Intel (64 bits)
203           CalendarAgent          silvanalahutte          0,0          4          13,4 MB          Intel (64 bits)
251           com.apple.iCloudHelper          silvanalahutte          0,0          7          12,2 MB          Intel (64 bits)
32           opendirectoryd          root          0,0          8          10,0 MB          Intel (64 bits)
211           Extensão Captura de Imagem          silvanalahutte          0,0          3          9,4 MB          Intel (64 bits)
296           com.apple.NotesMigratorService          silvanalahutte          0,0          2          9,4 MB          Intel (64 bits)
188           HPScanner          silvanalahutte          0,0          3          9,4 MB          Intel (64 bits)
190           UserEventAgent          silvanalahutte          0,0          3          8,3 MB          Intel (64 bits)
15           securityd          root          0,0          4          8,2 MB          Intel (64 bits)
258           AppleSpell.service          silvanalahutte          0,0          2          8,0 MB          Intel (64 bits)
56           apsd          root          0,0          4          7,2 MB          Intel (64 bits)
103           aosnotifyd          root          0,0          4          7,2 MB          Intel (64 bits)
40           locationd          _locationd          0,0          7          7,2 MB          Intel (64 bits)
137           coreaudiod          _coreaudiod          0,0          4          7,1 MB          Intel (64 bits)
274           Quick Look Helper          silvanalahutte          0,0          5          7,0 MB          Intel (64 bits)
126           named          root          0,0          1          7,0 MB          Intel (64 bits)
172           talagent          silvanalahutte          0,0          2          6,9 MB          Intel (64 bits)
215           CIJScannerRegister          silvanalahutte          0,0          6          6,1 MB          Intel (64 bits)
216           xpcd          silvanalahutte          0,0          2          5,8 MB          Intel (64 bits)
305           mdworker          _spotlight          0,0          3          5,3 MB          Intel (64 bits)
212           accountsd          silvanalahutte          0,0          2          5,1 MB          Intel (64 bits)
105           ocspd          root          0,0          4          4,9 MB          Intel (64 bits)
199           imagent          silvanalahutte          0,0          3          4,6 MB          Intel (64 bits)
180           xpcd          _coreaudiod          0,0          2          4,4 MB          Intel (64 bits)
165           fontd          silvanalahutte          0,0          2          4,2 MB          Intel (64 bits)
183           com.apple.audio.SandboxHelper          _coreaudiod          0,0          2          4,2 MB          Intel (64 bits)
295           com.apple.hiservices-xpcservice          silvanalahutte          0,0          2          4,1 MB          Intel (64 bits)
13           taskgated          root          0,0          4          4,0 MB          Intel (64 bits)
18           configd          root          0,0          7          4,0 MB          Intel (64 bits)
12           kextd          root          0,0          2          3,9 MB          Intel (64 bits)
11           UserEventAgent          root          0,0          3          3,8 MB          Intel (64 bits)
104           socketfilterfw          root          0,0          3          3,3 MB          Intel (64 bits)
189           usernoted          silvanalahutte          0,0          2          3,3 MB          Intel (64 bits)
300           CVMCompiler          silvanalahutte          0,0          2          3,2 MB          Intel (64 bits)
106           rpcsvchost          root          0,0          16          2,8 MB          Intel (64 bits)
36           mDNSResponder          _mdnsresponder          0,0          3          2,8 MB          Intel (64 bits)
45           fseventsd          root          0,0          63          2,7 MB          Intel (64 bits)
123           wifid          root          0,0          2          2,7 MB          Intel (64 bits)
285           lsboxd          silvanalahutte          0,0          2          2,6 MB          Intel (64 bits)
50           appleeventsd          _eppc          0,0          2          2,6 MB          Intel (64 bits)
246           pbs          silvanalahutte          0,0          2          2,6 MB          Intel (64 bits)
29           revisiond          root          0,0          4          2,6 MB          Intel (64 bits)
23           usbmuxd          _usbmuxd          0,0          3          2,5 MB          Intel (64 bits)
187           NetworkBrowserAgent          silvanalahutte          0,0          3          2,5 MB          Intel (64 bits)
42           InternetSharing          root          0,0          8          2,3 MB          Intel (64 bits)
73           netbiosd          _netbios          0,0          3          2,2 MB          Intel (64 bits)
200           helpd          silvanalahutte          0,0          2          2,1 MB          Intel (64 bits)
186           filecoordinationd          root          0,0          2          2,0 MB          Intel (64 bits)
202           AppleIDAuthAgent          silvanalahutte          0,0          3          2,0 MB          Intel (64 bits)
57           distnoted          root          0,0          2          2,0 MB          Intel (64 bits)
241           printtool          silvanalahutte          0,0          2          1,9 MB          Intel (64 bits)
220           AirPort Base Station Agent          silvanalahutte          0,0          4          1,8 MB          Intel (64 bits)
55           autofsd          root          0,0          2          1,8 MB          Intel (64 bits)
138           logind          root          0,0          2          1,7 MB          Intel (64 bits)
49           dpd          root          0,0          2          1,7 MB          Intel (64 bits)
1           launchd          root          0,0          3          1,6 MB          Intel (64 bits)
44           hidd          root          0,3          3          1,6 MB          Intel (64 bits)
27           SleepServicesD          root          0,0          2          1,6 MB          Intel (64 bits)
127           bootpd          root          0,0          1          1,6 MB          Intel (64 bits)
160           cfprefsd          silvanalahutte          0,0          4          1,6 MB          Intel (64 bits)
93           CVMServer          root          0,0          2          1,6 MB          Intel (64 bits)
30           ptmd          root          0,0          2          1,5 MB          Intel (64 bits)
16           diskarbitrationd          root          0,0          2          1,5 MB          Intel (64 bits)
63           cfprefsd          root          0,0          4          1,4 MB          Intel (64 bits)
14           notifyd          root          0,0          3          1,4 MB          Intel (64 bits)
267           distnoted          _spotlight          0,0          2          1,4 MB          Intel (64 bits)
155           launchd          silvanalahutte          0,0          2          1,4 MB          Intel (64 bits)
99           ntpd          root          0,0          2          1,3 MB          Intel (64 bits)
276           activitymonitord          root          0,8          1          1,3 MB          Intel (64 bits)
19           syslogd          root          0,0          5          1,3 MB          Intel (64 bits)
26           stackshot          root          0,0          3          1,1 MB          Intel (64 bits)
90           networkd          _networkd          0,0          2          1,0 MB          Intel (64 bits)
41           KernelEventAgent          root          0,0          3          996 KB          Intel (64 bits)
268           cfprefsd          _spotlight          0,0          2          988 KB          Intel (64 bits)
182           cfprefsd          _windowserver          0,0          2          960 KB          Intel (64 bits)
128           natpmpd          root          0,0          1          936 KB          Intel (64 bits)
301           WebKitPluginAgent          silvanalahutte          0,0          2          932 KB          Intel (64 bits)
166           pboard          silvanalahutte          0,0          1          932 KB          Intel (64 bits)
179           launchd          _windowserver          0,0          2          808 KB          Intel (64 bits)
264           launchd          _spotlight          0,0          2          804 KB          Intel (64 bits)

With space on the HD.
Depends on how much free space.
Right or control click the MacintoshHD icon on your Desktop.
Click Get Info. In the Get Info window you will see Capacity and Available.
Make sure there's a minimum of 15% free disk space.

[Solved] embedded videos in firefox take a lot of CPU time

Playing embeded videos in Firefox take a lot of CPU time. Actually my old computer is not able to play these videos correctly if they are in HD. The problem appears with flash videos (not so surprising, flash sucks...) but also with html5 videos (there is an option in youtube to turn that on). However if I succeed to have the direct URL, these videos play perfecrtlky fine in mplayer using not more than 10-20% of CPU time. Is there a solution to that? Is there any possibility to use an external player to play HTML5 videos in firefox? If anybody knows, Why this problem, are the mozilla folk aware of this problem? (Note that I posted a thread a long time ago for this problem but concerning flash only)
Last edited by olive (2012-04-27 20:33:59)

There's not much you can do to make HTML5 videos as fast as Xv, see http://swfdec.freedesktop.org/wiki/FAQ. They are slow for the same basic reason as Flash... the video overlay cannot be used because the standard allows for controls and CSS to be rendered on top of the video.
As for redirecting to an external player... this is not as easy as it could be. If the videos appeared in <embed> tags or <object> tags, one could use Mozplugger, Media Player Connectivity and other programs, but I don't think one has been written to handle the <video> tag. An upcoming update to firefox will make it use gstreamer, however. If this still results in slow playback, it will at least make it easier to use an external player. I imagine you would have to patch firefox to make it use a port on the localhost as the video sink instead of the screen. Then you would run gst-launch to receive that RTP stream.

"3265 du process" appears and disappears and occupies a lot of CPU System usage: what is that and how to remove that unknown process

Opening the utility "activity monitor", I see a process that appears and disappears, called 3265 "du" process. It occupies a lot of CPU % system (the red one in the mac activity monitor utility). Anyone knows what's that and how can I remove it?
Probably the same issue of this discussion: https://discussions.apple.com/thread/1968751?start=0&tstart=0
But no idea about how to solve it!

BSD General Commands Manual
du -- display disk usage statistics
The du utility displays the file system block usage for each file argu-
     ment and for each directory in the file hierarchy rooted in each direc-
     tory argument. If no file is specified, the block usage of the hierarchy
     rooted in the current directory is displayed.
To see for yourself use Terminal program enter: man du
press enter (to see the manual for "du")

Kernel_task consumes a lot of CPU

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