High CPU usage when selecting certain emails

I experience (above) 100% CPU usage in Mail.app when selecting certain emails. Mostly emails from the same sender.
The emails contain MIME multipart data. One part is BASE64 encoded text, the other is quoted-printable encoded HTML.
I can see in the process trace that two threads seem to be thrashing around in MFRedundantTextIdentifier.
CPU usage goes up. I can still use the application (it is not blocked). But it cannot be quit normally (only with force quit).
Apple engineers: this must be something that you would wish to find and fix?
Any help with diagnosing would be greatly appreciated!
Sincerely.
-dennis

Maybe my initial post was not clear so let me add some clarifications.
I have the problem with Aero disabled
I have the problem on the Apple site which does not have any flash content.
I have already hacked the lastest nvidia drivers to get them on my system which did not change anything. Can you provide a link to some other 'supported' beta drivers?
I am using the new 13 inch air so it has the newer graphics card so I would expect it to be faster than an old HTPC with a 9400m in it. I wasn't stating that my Air had a 9400m.
It would be great if someone you also do the test to check the cpu load:
- when playing a 720 mkv
- when dragging a window across the screen
Just open task manager and see if the CPU spikes.
Many thanks!

Similar Messages

Google Earth Plugin and LabVIEW: High CPU usage when adding placemarks

Hi,
I posted this question on stackoverflow earlier this week but feel it might be better suited to the LabVIEW community specifically so I'm reposting here:
I'm writing an application which uses the Google Earth Plugin to display events on the globe. Each event is a single point kml placemark with an icon which is a 3kb png file. Placemarks are uploaded to the plugin as they are received by the software. I am experiencing increasing CPU usage with the number of placemarks that are added.
I have tested displaying a new placemark every second and running until the software running the plugin completely froze (graph attached). The GEPlugin (green trace) stopped responding (i.e. the globe did not respond to the mouse) at around 1200 placemarks added and CPU usage was at ~30%. When the software itself (red trace) froze the plugin was using around 50% CPU and ~3700 placemarks had been added). After the freeze, no new placemarks were added which caused the software to respond (but not the plugin) so I could clear all the placemarks. After the placemarks were cleared from the globe, the CPU usage of the plugin returned to around 5% CPU.
So what I've seen is that GEPlugin CPU usage increases linearly with each kml placemark added. Is this the expected behaviour/ a normal limitation of the plugin? If not is there a more efficient way of adding many placemarks to the globe?
I am using GEPlugin version 7.1.1.1580 (API version 1.010) and LabVIEW 12.0f3
Please see the test results attached. Any input greatly appreciated!
Original stackoverflow post:
http://stackoverflow.com/questions/20994323/google-earth-plugin-with-labview-high-cpu-usage-when-add...
Attachments:
Performance Log 020114_095115.png ‏82 KB

Hello,
I have had a look at your graphs and understood what you are trying to do. To me it seems that as the image gets more complex it gets harde to render which wold likely cause increase in CPU usage resulting in the freeze. I would suggest you try running the program on anoher computer to check on the RAM front of things. If this is a limitation of the GE Plugin then unfortunately I can not do much to help, but if you think this is a problem coming from your LabVIEW code then you can post your code here and I can take a look.

High CPU usage when graphics card is put at work

I have a 13inch Air with 2GB RAM and 256GB with Windows 7 Ultimate 64bit. All possible updates have been installed.
I noticed some tearing when trying to move program windows across the screen so I started checking the CPU usage. I saw that it is spiking to 25-35% when moving a window across the screen.When you drag down a window you can see the different copies of the top bar across the screen. Not smooth at all like on a standard PC windows system. Same issue when scrolling through webpages which spikes the cpu
I also noticed a high cpu usage when playing mkv files 25-30% while on an Atom HTPC i get a lower load playing the same file. The Air should be faster than an atom with a nvidia 9400m when playing video files.
I already tried updating the nvidia files to the latest version on their site by hacking the driver inf but this did not resolve the issue.
Has anyone experienced the same or know what could be causing the beavior?
Many thanks

Maybe my initial post was not clear so let me add some clarifications.
I have the problem with Aero disabled
I have the problem on the Apple site which does not have any flash content.
I have already hacked the lastest nvidia drivers to get them on my system which did not change anything. Can you provide a link to some other 'supported' beta drivers?
I am using the new 13 inch air so it has the newer graphics card so I would expect it to be faster than an old HTPC with a 9400m in it. I wasn't stating that my Air had a 9400m.
It would be great if someone you also do the test to check the cpu load:
- when playing a 720 mkv
- when dragging a window across the screen
Just open task manager and see if the CPU spikes.
Many thanks!

High CPU usage when downloading Files

Hi there,
i noticed somethign strage when I download file off the internet or intranet. As soon as my download speed surpasses 1MB/s the CPU usage increases. To be exact the process kernel_task.
For example:
2,5 MB/s -> ~30%
10 MB/s -> ~60-70%
10+ MB/s -> ~80%
This is really annoying and I have now clue how to fix this. The Harddrive is a SAMSUNG HM320JI with a Journaled HFS+ partition. No Virus Scanner or anything. Also just reinstalled Snow Leopard yesterday.
Hope someone can give me some useful information how to fix this.

Hiya,
could it have something to do with the write speed/ cache/ram? On a "slow" disk, or one that is nearly full or one that is partitioned, it will take a great deal more ram and cache to "digest" the faster download and write it onto disk. I tend to do downloads to a separate drive. Have you got one? and can you repeat the high CPU usage when downloading / saving to the external drive? I note your drive might have 5,400 rpm, with "just" 8mB cache and 320 GB (quite a few SATA's have 7,200 rpm and 32 mB cache).
NB: If anything, I found SL more efficient, especially on my 4 year old Macbook, which is running much faster and has got more responsive after installation of (full version of) SL.
Message was edited by: Alexandre

ITunes 10.6 has High CPU Usage when switched to Mini Player

iTunes has high CPU usage when switched to mini player. The CPU usage goes to 80-100% when the next song is played in Mini Player. iTunes then stays at high CPU usage.
Upon exiting mini player the CPU usage will drop back to the normal 0-5% levels.
This only happens when playing from the main music library; which my library is at 7089 items, 42.04 GB.
When playing from a smaller playlist such as a smart playlist with about 15 songs in it for example, the CPU usage stays low/normal.

Do you have any better luck with that if you update to iTunes 10.6.1.7?
From the notes for the release:
iTunes 10.6.1 provides a number of improvements, including:
• Fixes several issues that may cause iTunes to unexpectedly quit while playing videos, changing artwork size in Grid view and syncing photos to devices.
• Addresses an issue where some iTunes interface elements are incorrectly described by VoiceOver and WindowEyes.
• Fixes a problem where iTunes may become unresponsive while syncing iPod nano or iPod shuffle.
• Resolves an ordering problem while browsing TV episodes in your iTunes library on Apple TV.
http://www.apple.com/itunes/download/

High CPU usage when downloading from ITunes Match

When attempting to download matched songs from ITunes Match, ITunes utilization spikes to over 70% and makes it almost impossible to do any other function on the computer. Eventually ITunes fails to respond. I have tried several remedies including reseting winsock. Is there any other options I should try?

Hiya,
could it have something to do with the write speed/ cache/ram? On a "slow" disk, or one that is nearly full or one that is partitioned, it will take a great deal more ram and cache to "digest" the faster download and write it onto disk. I tend to do downloads to a separate drive. Have you got one? and can you repeat the high CPU usage when downloading / saving to the external drive? I note your drive might have 5,400 rpm, with "just" 8mB cache and 320 GB (quite a few SATA's have 7,200 rpm and 32 mB cache).
NB: If anything, I found SL more efficient, especially on my 4 year old Macbook, which is running much faster and has got more responsive after installation of (full version of) SL.
Message was edited by: Alexandre

High CPU usage when updating or instlling s/w

When updating Win8 or installing MS Office system slows down and has to run all night to make any progress. Task Manager shows "System" using 49%. "go to process" shows "NT Kernel & System". The system was bought with Win7 and is now double booting both 7 & 8. Win 8 partition has 500 GB.
This question was solved.
View Solution.

Hello @Dan-44,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I have read your post on how your computer is displaying a high CPU usage when installing updates or other software. I would be happy to assist you in this matter!
What other programs are in use when these updates take place? How full is your computer's Local Disk hard drive? In the meantime, I recommend following the steps in this document on Resolving Slow System Performance (Windows 8). This should help improve the speed and efficiency of your operating system.
Please re-post with the results of your troubleshooting, as well as the requested information above. I look forward to your reply!
Regards
MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

High CPU usage when editing large MXML files

I am using Flash Builder 4.5 Plug-in on OSX. When I have a large MXML file open, Eclipse will consume 100% of the CPU as long as that file is open, even if I am not doing anything. If I close that editor the CPU usage goes back down. I've seen this in Flash Builder standalone as well as the plugin. Is there a workaround to stop this CPU usage problem?
Thanks

Hiya,
could it have something to do with the write speed/ cache/ram? On a "slow" disk, or one that is nearly full or one that is partitioned, it will take a great deal more ram and cache to "digest" the faster download and write it onto disk. I tend to do downloads to a separate drive. Have you got one? and can you repeat the high CPU usage when downloading / saving to the external drive? I note your drive might have 5,400 rpm, with "just" 8mB cache and 320 GB (quite a few SATA's have 7,200 rpm and 32 mB cache).
NB: If anything, I found SL more efficient, especially on my 4 year old Macbook, which is running much faster and has got more responsive after installation of (full version of) SL.
Message was edited by: Alexandre

High CPU usage on select

This is a spin off from another thread which started off as slow inserts. But what actaully happens is every insert is preceded by select it turned out that the select was slow.
We have a multi-tier web application conencting to the DB using connection pool and inserting about a 100000 records in a table. To isolate the issue I wrote a PL/SQL which does the same thing.
This problem happens every time the schema is recreated or the table dropped and created again and we start inserting. When the table is empty, the selects choose a full table scan but as the records are inserted it continues to use the same even though after a few thousands of rows I run stats. But as its running if gather stats and flush the shared pool, it picks up the new plan using the indexes and immediately gets faster.
But in either case, full tablescan being slow after a few thousands of rows or using the index and getting much faster. Or me just doing the same select and no inserts on a table with 100000 rows, the CPU seems to be pegged to the core.
The code snipped repeated again
DECLARE
   uname    NVARCHAR2 (60);
   primid   NVARCHAR2 (60);
   num      NUMBER;
BEGIN
   FOR i IN 1 .. 100000
   LOOP
      uname := DBMS_RANDOM.STRING ('x', 20);
      primid := DBMS_RANDOM.STRING ('x', 30);
      DBMS_OUTPUT.put_line (uname || ' ==> ' || primid);
      SELECT   COUNT (*)
          INTO num
          FROM TEST
         WHERE ID = 0
           AND (primid = primid OR UPPER (username) = uname OR uiname = uname
           AND (deldate IS NULL)
      ORDER BY TIME DESC;
      INSERT INTO TEST
           VALUES (0, uname, uname, 1, uname, primid);
      IF MOD (i, 200) = 0
      THEN
         COMMIT;
         DBMS_OUTPUT.put_line ('Commited');
      END IF;
   END LOOP;
END;This is the original thread
Re: Slow inserts

Maybe if you post the actual code, or a code as similar to the actual code, the users of this forum may provide you with more appropriate suggestions.
Personally, I would like to understand what is the logic behind, so I can provide you with better advices.
Anyway, let's focus on the code that we currently have on the table.
Why your CPU goes high?
- Huge amount of LIOs produced by SELECT statement which is executed 100000 times.
- Usage of single-row / aggregate functions
- You mentioned you have some indexes created on table TEST. Index maintenance consumes some CPU as well.
Let's focus on the SELECT statement, since it is the most important reason for having high number of LIOs thus having high CPU usage.
I built a test case using the query you provided, with one difference, I named TEST table columns as COL1, COL2, etc. And instead of 100,000 cycles, I did 10,000
declare
   uname varchar2(60);
   pname varchar2(60);
   num number(5);
   begin
   for i in 1..10000 loop
      uname:=dbms_random.string('x',30);
      pname:=dbms_random.string('x',20);
      select count(1)
      into num
      from test
      where col1=0
      and (col2=uname or upper(col5)=pname or col3=uname)
      and col4 is not null;
      insert into test
      values (0,uname,pname,1,uname,uname);
      if mod(i,200)=0 then
              commit;
      end if;
   end loop;
end;When I run 10046 trace and made tkprof report, I got the following for the SELECT part:
SELECT COUNT(1)
FROM
TEST WHERE COL1=0 AND (COL2=:B1 OR UPPER(COL5)=:B2 OR COL3=:B1 ) AND COL4 IS
NOT NULL
call     count       cpu    elapsed       disk      query    current        rows
Parse        2      0.00       0.00          0          0          0           0
Execute 10050      0.48       0.43          0          0         50           0
Fetch    10000     94.07      94.37          0    2910664          2       10000
total    20052     94.56      94.80          0    2910664         52       10000As you can see, tkprof report indicated high CPU usage and 2,910,664 LIO calls.
The execution plan (I didn't include that part) indicated FULL TABLE scan on table TEST was used.
At this point the goal should be to reduce the number of LIO calls.
For this purpose I created the following indexes:
TEST_IDX1 on TEST(col2)
TEST_IDX2 on TEST(col3)
TEST_IDX3 on TEST(upper(col5)) - a Function Based Index
Let's forget about the statistics at this moment.
I will use index_combine hint in the SELECT statement to make CBO to try every index combination for listed indexes (B-Tree) and make bitmap conversion.
The new code looks like this
declare
   uname varchar2(60);
   pname varchar2(60);
   num number(5);
   begin
   for i in 1..10000 loop
      uname:=dbms_random.string('x',30);
      pname:=dbms_random.string('x',20);
      select /*+ index_combine(test test_idx1 test_idx2 test_idx3) */ count(1)
      into num
      from test
      where col1=0
      and (col2=uname or upper(col5)=pname or col3=uname)
      and col4 is not null;
      insert into test
      values (0,uname,pname,1,uname,uname);
      if mod(i,200)=0 then
              commit;
      end if;
   end loop;
end;After running 10046 trace and creating tkprof report, I got the following result:
SELECT /*+ index_combine(test test_idx1 test_idx2 test_idx3) */ COUNT(1)
FROM
TEST WHERE COL1=0 AND (COL2=:B1 OR UPPER(COL5)=:B2 OR COL3=:B1 ) AND COL4 IS
NOT NULL
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute 10000      0.79       0.70          0          0          0           0
Fetch    10000      0.68       0.71          3      59884          0       10000
total    20001      1.47       1.42          3      59884          0       10000
Misses in library cache during parse: 1
Misses in library cache during execute: 1
Optimizer mode: ALL_ROWS
Parsing user id: 54     (recursive depth: 1)
Rows     Row Source Operation
10000 SORT AGGREGATE (cr=59884 pr=3 pw=0 time=1188641 us)
      0   TABLE ACCESS BY INDEX ROWID TEST (cr=59884 pr=3 pw=0 time=1012723 us)
      0    BITMAP CONVERSION TO ROWIDS (cr=59884 pr=3 pw=0 time=915796 us)
      0     BITMAP OR (cr=59884 pr=3 pw=0 time=820728 us)
      0      BITMAP CONVERSION FROM ROWIDS (cr=20039 pr=1 pw=0 time=258455 us)
      0       INDEX RANGE SCAN TEST_IDX1 (cr=20039 pr=1 pw=0 time=157107 us)(object id 52988)
      0      BITMAP CONVERSION FROM ROWIDS (cr=19902 pr=1 pw=0 time=198466 us)
      0       INDEX RANGE SCAN TEST_IDX2 (cr=19902 pr=1 pw=0 time=109999 us)(object id 52989)
      0      BITMAP CONVERSION FROM ROWIDS (cr=19943 pr=1 pw=0 time=198730 us)
      0       INDEX RANGE SCAN TEST_IDX3 (cr=19943 pr=1 pw=0 time=107200 us)(object id 52990)As you can see the number of LIO calls fallen dramatically. Also CPU time is significantly less.
The second code completed in few seconds compared to the previous one which needed about 100 seconds to complete.
Please be aware that this is just an example of tuning the code that you provided.
This solution might not be suitable for your actual code, since we don't have any information about it. That's why it is important to give us as much information as you could, so you can get the most appropriate answer.
If the test code is similar to the actual one, you should focus on reducing LIOs calls.
In order to achieve it, you may want to use hints to force an index to be used.
Cheers,
Mihajlo

Since 10.4.6 Update: "ATSServer" with high CPU-usage when opening PDFs

Since I've updated to 10.4.6 my system is very slow when I open PDFs (in "Preview" or "Acrobat").
This is caused by the process "ATSServer" which goes through every file in "~/Library/Fonts" (I have over 4.800 files there - but just a view are activated by "FontBook") and so it takes very high CPU-usage.
I didn't have this problem bevore the update and I didn't make any changes on my font settings.
I've cleaned the font cache, but it doesn't help.
Any ideas?
Ciao
Mephizo
PS: Excuse my poor English.
PowerBook G4 17'' 1.67 GHz Mac OS X (10.4.6)
PowerBook G4 17'' 1.67 GHz Mac OS X (10.4.6)

I haven't noticed any change myself, Dan, but I have the 2 GHz model.
One thing I HAVE noticed though after OS updates is that they can often result in a fair amount of file and free space fragmentation immediately after installation. OSX's routines will deal with fragmentation of small files , but not of large ones (over 20 Meg), and it won't deal very effectively with free space fragmentation. If your HD is getting full this can cause significant slowdowns, especially where video is involved.
You should also run DiskUtility and check for any directory and permissions issues.
Cheers
Rod

High cpu usage when moving application windows

Hello all,
I have two machines with arch installed:
- an eeepc 701 surf/intel gpu(xorg driver) with xfce
- an amd 3800+ X2/nvidia 8860 gt(proprietary driver) with kdemod3(also checked with xfce4)/arch amd64 installed.
I noticed that when i move a window of an application(for example konsole, etc..) too fast i get high cpu usage(30-40 %), when checking with htop.
Is it normal that the X server uses the cpu so much when moving a window??
EDIT: up to now i tested it in a friends windows machine, and it happens exactly the same, so i guess is normal. It seems i need to be informed better about how X works :-)
Last edited by mechmg93 (2008-10-15 08:04:10)

today i switced back my desktop system to debian unstable and tried to see what the difference is concerning this problem.
I found out that in kde3 the solution to the "problem" is debians kde default configuration about window behaviour.
Especially the one mentioned below :
In debian this is not ticked and this has as a result zero cpu usage when windows are moved.
Last edited by mechmg93 (2008-10-23 18:36:58)

Continual HD activity, high CPU usage when idle

I got my first notebook, a Compaq V2000, a few weeks ago and have Arch set up pretty well on it but I have a few issues. Even when the machine is sitting idle it sounds like the HD is doing a read (or whatever) about every 5 seconds. This only starts after I log into Gnome and stops if I log out.
I tried a couple of things with hdparm:
If I try 'hdparm -y /dev/hda' the drive goes to standby but immediately spins up again.
'hdparm -B 255 /dev/hda' disables APM and stops the cyclic behavior. This would seem to be good but during the 5 second cycle the drive alternates between quiet and noisy and this leaves it in the noisy state.
I tried to determine what might be causing all this disk activity so I edited lilo.conf to remove "acpi=on apm=off" from the "append=" line and in rc.conf I put a ! in front of all modules and daemons and rebooted. I removed the applets from task bar. No change.
I ran top to see if I could tell what was accessing the HD but I'm not knowledgable enough to make much sense of it. I did notice that on my notebook the top summary shows:
CPU: ~30% user, ~10% system, ~60% idle with 'wait' bouncing between 0 and 5%
On my main computer, also running Arch/Gnome, I get
CPU: ~2% user, ~1% system, ~97% idle with 'wait' solid at 0%
On the notebook, if I run hdparm -B 255 /dev/hda the CPU #'s for user and system remain high but the wait # drops to zero and stays there.
I don't think all this HD activity could be good for my machine, and I know I find it very annoying. If anyone could help me stop all the HD accesses and understand the high CPU usage I would appreciate it.

I loaded lsof and frankly it scared me. It listed what looked like a couple hundred files and I didn't know exactly how to use that information.
Then I tried laptop-mode-tools. The man pages didn't sound too promising since it uses, among other things, hdparm, which I already tried with mixed results. I gave it a try anyway and right out of the box, with no configuration, it worked. HD access when idle dropped to essentially none, the drive spins down and the cooling fan runs much less frequently.
So far all I have changed in the config file are the HD idle timeouts. The default of 5 seconds was starting and stopping the HD too often so I changed that to 20 seconds for now.
Whatever laptop-mode did to stop the 5-second HD accesses the effect persists even if I run 'laptop_mode stop' and '/etc/rc.d/laptop-mode stop'. When I get the time I should be able to use 'laptop_mode status' and laptop-mode.conf settings to determine exactly what the magic bullet was.
Thanks, lucke. I never would have tried laptop-mode on my own because I thought it only duplicated functionality that I already had with hdparm and powernowd.

High CPU usage when playing flv files with flash

As more and more FLV videos are moving to HD, I'm noticing
high CPU usage and lots of dropped frames when playing FLV video in
web browser with Flash 10. This is true even if the video isn't
full screen. I've tried a variety of browsers (Firefox, I.E.,
Chrome) and the problem occurs on all of them so it's pretty clear
it's a limitation in Flash.
Now my PC isn't high end (it has a Pentium M 1.86 GHz
processor), but I can take those same FLV files and load them in
something like Media Player Classic or Windows Media Player (when
using ffdshow) and play the FLV files full screen with little or no
drop in frames and an acceptable CPU rate.
This is especially annoying on sites like YouTube where I
actually have to save the video and play it back in something other
than Flash to have it play back at an acceptable rate. This doesn't
work for other sites like Amazon.
Why is the CPU usage so high when decoding and displaying
videos when compared to other media players?

I've been doing research about this excessively high CPU usage problem (100%!) for weeks because I have also experienced it with my vista home premium laptop. Just recently, I have finally found the solution. The problem is not your browser or your OS or your pc's memory. The problem is caused by authorization for flash player.
Read the link (posted below) carefully and follow the steps accordingly. If you have already done steps 1 through 6 with your computer, you can go straight to step 7.
http://thetechangel.com/blogberry/2008/10/adobe-flash-player-10-fix-for-vista-xp/
PS: I am not the author of that link, so please thank the respective site owner if you find the procedure very helpful.
Please let me know also if the link solves your problem. I am sharing this because Adobe seems unable to provide solutions to this, and I don't want to hear people suffer.
My blog:
http://literaryworks101.blogspot.com
http://bookofsalamat.blogspot.com
Thanks

High cpu usage when the system is idle

I do have a high cpu usage problem when the system is idle. I bought the laptop (lenovo x230 tablet) with windows 7 installed in it. Then upgraded to windows 8. But ever since I have problems with high cpu usage by the system even when the computer is idle.
Only the system by itself uses around 30% of the cpu all the time. I ran xperf, and here is the result of it:
http://sdrv.ms/Kj6CFN
I appreciate any help you can provide.
Thanks,

Hi,
I'm sorry for that the log you provide can't be opened on my computer. While according to your description, it should had a special process that consume CPU usage when system idle Iguess, isn't it?
You can use
Process Explorer to monitor the process activity, may be we can find the reason of this problem.
Note: We can use Process Explorer to check the Stack of every process then analyize the problem in deep.
To gave a better insight about this problem, you can take a ScreenShot for this problem and provide the picture here.
Roger Lu
TechNet Community Support

High CPU usage when in Gmail's standard HTML mode

Issue: High CPU usage (> 50%, often > 90%) ONLY when Gmail page is open. When page is closed or if I switch to basic HTML, CPU usage drops to less than 10%.
Macbook | OS X 10.6.3 | 2.4 GHz Intel Core Duo | 4 GB RAM | FF 3.63
== URL of affected sites ==
http://mail.google.com

I have a similar on my son's account on when he play games spel.nl. I think the problem is a Flash player that doesn't let go of the CPU, even when another user has the screen.

High CPU usage when selecting certain emails

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