CPU utilization during GC...?? (Need Help).
In am currently investigating high CPU utilization of an application at certain peak times.
During the course of investigation, I was watching the Performance Monitor screen on the Weblogic Admin Console.
I noticed that the "Memory Usage" graph(Amount of memory available in the JVM Heap) is showing continuous set of spikes during the peak times of the application.
Now I am wondering if:
1) I can infer that this is really GC happening multiple times, which is showing as the spike pattern on the graph.
(I cannot turn on any verbose GC options, since the app is on production).
2) Does doing GC contribute to the User CPU or System CPU.
(Although the JVM i.e: Weblogic server was started as a user process, I want to know if GC is completely accounted into the User CPU count).
Please advice. I really want to get this thing clear.
Hi,
Yes, the sawtooth pattern shows that a GC has happened on every peak.
I assume that you run on top of some Linux distribution.
GC does contribute mainly to the value registered under User CPU unless you have limited physical memory on your machine where you could note an increase in System CPU during swapping.
Optimization could also contribute to high CPU usage, you can turn off optimization with -Xnoopt.
If you run with -Xgc:parallel (default with most JRockit versions), highest throughput is achieved when all CPUs concentrate on GC, thus generating a high CPU usage.
What JRockit version are you using? (Include -showversion in your commandline or run java -version.)
Kind regards, Cecilia
JRockit Customer Centric Engineering
Kind regards,
Cecilia Borg
BEA WebLogic JRockit
Similar Messages
-
Throttle CPU utilization during software updates
Are there any settings to throttle CPU Utilization during software update installation on client computers? I am deploying updates to test systems currently and noticed that the CPU utilization was being pegged at 100% during the install. After
the updates installed, the system returned to normal.Also note that ultimately, it is the Windows Update Agent that is installing the update(s) so it's not really within ConfigMgr's scope of control and would happen no matter what method you chose to use to update these systems with Windows Updates which
leads me to believe these systems have perf issues to begin with. Are they VMs?
Jason | http://blog.configmgrftw.com -
Jagged peaked cpu utilization during export
Hello All,
When I export JPGs onto my local drive from lightroom 5.6 the CPU utilization is rather low and goes up and down (see photo below). Also the export is quite slow, 250 files at 90% from RAW. Is this pattern normal and why is lightroom not using all of my resources?? Only <1/2 CPU and 4 GB of RAM out of 12. I didn't have anything else running except a browser.
I see a consistent very high CPU utilization when rendering out of after effects and much higher, but still somewhat peaked utilization with Premiere Pro media encoder.
My system is pretty fast, i7 quadcore, haswell. It does not seem that all the cores are being used by lightroom, but that is a known issue I guess that can be addressed by breaking up the export into multiple smaller exports.
ThanksHello,
here are my results. One export. Screenshot from task manager and thread view from process exporer.
Now, same screenshots with two exports:
Never saw more than 3 threads (parallel processes) with on export but 6 threads with two exports. Systems becomes sluggish with two exports. Overall CPU usage of Lightroom increases about 10-20%. -
Crash during Startup - need help deciphering Problem Report for Kernel
I got the crash message with subsequent system lockup during my last startup. This is what the problem report states:
Interval Since Last Panic Report: 1302194 sec
Panics Since Last Report: 5
Sun Sep 27 18:46:32 2009
Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x0000000000000000 PC=0x00000000000ACD2C
Latest crash info for cpu 0:
Exception state (sv=0x301bc780)
PC=0x000ACD2C; MSR=0x00009030; DAR=0x00000000; DSISR=0x40000000; LR=0x00DDC2F4; R1=0x3028FBF0; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x03680F8C 0x0012F064 0x001D25AC 0x001C8F80 0x001C9030 0x0003F2A0
0x000B1DD4
Kernel loadable modules in backtrace (with dependencies):
com.cisco.nke.ipsec(2.0.1)@0xdd9000->0xe5afff
Proceeding back via exception chain:
Exception state (sv=0x301bc780)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x2a2cd000)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
BSD process name corresponding to current thread: kernel_task
Mac OS version:
9L30
Kernel version:
Darwin Kernel Version 9.8.0: Wed Jul 15 16:57:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_PPC
System model name: PowerBook5,6
System uptime in nanoseconds: 66876930554
unloaded kexts:
(none)
loaded kexts:
com.cisco.nke.ipsec 2.0.1 - last loaded 1232289266
com.Cycling74.driver.Soundflower 1.4.3
net.telestream.driver.IODVDImage 1.0 BETA
com.AmbrosiaSW.AudioSupport 2.3.7
com.Logitech.driver.HIDDevices 2.1.2
com.apple.iokit.IOBluetoothSerialManager 2.1.8f2
com.apple.filesystems.autofs 2.0.2
com.apple.driver.AppleTAS3004Audio 2.5.8f1
com.apple.driver.AudioIPCDriver 1.0.6
com.apple.driver.IOI2CLM7x 1.9d0
com.apple.iokit.IOFireWireIP 1.7.7
com.apple.ATIRadeon9700 5.4.8
com.apple.driver.AppleHWClock 1.5.2d0
com.apple.driver.AppleTexasAudio 2.5.8f1
com.apple.driver.AppleTexas2Audio 2.5.8f1
com.apple.driver.AppleDACAAudio 2.5.8f1
com.apple.driver.AppleHWSensor 1.9d0
com.apple.driver.AppleSMUMonitor 1.9d0
com.apple.driver.IOI2CADT746x 1.0.10f1
com.apple.AppleOnboardDisplay 1.15.1
com.apple.driver.InternalModemSupport 2.4.0
com.apple.driver.MotorolaSM56K 1.3.9
com.apple.driver.AppleSCCSerial 1.3.2
com.apple.driver.PBG4_ThermalProfile 3.4.0d0
com.apple.driver.AppleK2Driver 1.7.2f1
com.apple.kext.IOI2CDeviceLMU 1.4.5d1
com.apple.driver.AppleI2S 1.0.1f1
com.apple.driver.CSRUSBBluetoothHCIController 2.1.8f2
com.apple.driver.AppleUSBMergeNub 3.4.6
com.apple.driver.AppleUSBTrackpad 1.7.4f1
com.apple.driver.AppleUSBTCKeyEventDriver 1.7.4f1
com.apple.driver.AppleUSBTCKeyboard 1.7.4f1
com.apple.driver.CSRHIDTransitionDriver 2.1.8f2
com.apple.driver.AppleFileSystemDriver 1.1.0
com.apple.driver.iTunesPhoneDriver 1.0
com.apple.iokit.IOUSBMassStorageClass 2.0.8
com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.1.1
com.apple.iokit.SCSITaskUserClient 2.1.1
com.apple.driver.XsanFilter 2.7.91
com.apple.iokit.IOATAPIProtocolTransport 1.5.3
com.apple.iokit.IOATABlockStorage 2.0.6
com.apple.driver.ApplePMU 2.5.6d2
com.apple.driver.AppleUSBHub 3.4.9
com.apple.iokit.IOUSBUserClient 3.4.9
com.apple.driver.AppleI2CPMU 3.5.1
com.apple.driver.AppleGPIO 1.3.0d0
com.apple.iokit.AppleMediaBay 1.0.2f1
com.apple.driver.KeyLargoATA 1.1.1f1
com.apple.driver.AppleVIA 1.5.1d1
com.apple.driver.MacIOGPIO 1.3.0d0
com.apple.driver.AppleMPIC 1.5.3
com.apple.driver.IO@
just wondering if there are any signs that indicate my Powerbook is slowly dying... it's been slowing down noticeably even with only one app running on a fresh restartI'm betting it's your Cisco hardware and its software driver. The driver is reported as com.cisco.nke.ipsec. I don't know what the actual driver file is called, but I would look in the /System/Library/Extensions/ folder for any drivers with "cisco" in the filename. Select the item(s) then CTRL- or RIGHT-click and select "Move to Trash" from the contextual menu. Do not empty the Trash as you don't want to actually erase the item(s). Shutdown and disconnect and Cisco hardware. If there is a Cisco application involved be sure it will not launch automatically at startup. Reboot the computer. If your kernel panics cease you will need to contact Cisco about upgrades that are compatible. It could also be an incompatibility between the Cisco driver and one of the other third-party drivers that are in the Extensions folder and listed in your report:
com.Cycling74.driver.Soundflower
net.telestream.driver.IODVDImage
com.AmbrosiaSW.AudioSupport
com.Logitech.driver.HIDDevices -
[SOLVED] Error during boot, need help to identify
I've noticed recently that I'm getting an error during (taken from dmesg)
[ 7.982440] [drm:drm_pci_agp_init] *ERROR* Cannot initialize the agpgart module.
[ 7.982865] DRM: Fill_in_dev failed.
can anyone tell me where this is coming from and how to fix it maybe? I have a Intel i7-2600K (Ivy Bridge generation) with a Nvidia GTX 580 card using the propriatary driver.
Last edited by fettouhi (2014-11-20 21:28:04)BTW, if your processor really is an i7-2600k, that would make it a Sandy Bridge (2nd gen) processor, not an Ivy Bridge (3rd gen and starts with a '3'). Unless this is just a typo, knowing this might help you debug things in the future, as there are unfortunately bugs that affect some 2nd but not 3rd gen procssors, and vice-versa.
-
Itunes download 3.1.2 - frozen during download & need help
I'm trying to download 3.1.2 on my Itunes, but it seems to have frozen and "locked", telling me I still have 3 hours left to install. I don't have a ton of stuff on my computer that would cause it to be so slow, so I don't know how to fix the situation. Help. Anyone have any advice or know how to fix this? Thanx
There has been a long-standing issue with the way iTunes handles Podcasts when there are multiple episodes available.
When your iTunes Library checks for new episodes of subscribed Podcasts, it will download only the latest one. This is fine if there is only one episode since iTunes last checked. But if there are two or more, then iTunes still only downloads the latest one, and ignores the previous episodes. Apple's apparent attempt to resolve this issue is to show the other episodes, but with the download cloud icon next to them. All well-and-good, but it's not obvious that this is what is happening, particularly when the Unplayed Episode Count includes those non-downloaded episodes.
What compounds this issue is that the in-the-cloud episodes are listed in the Podcasts Library, which up until that change, only included media actually in your Library.
kstinmb wrote:
My question is: What else do I have to set so that the podcast episodes I have subscribed to are automatically downloaded?
Submit a product Enhancement Request as feedback at http://www.apple.com/feedback/itunesapp.html, although I suggest you don't get your hopes up. I submitted one a long time ago, but all Apple has done is introduce the "cloud" episodes, which has not solved the problem.
kstinmb wrote:
I have subscribed to almost 100 podcasts and I should not have to go to each one in Library | My Podcasts and manually select the newest episodes. Am I not following the directions? Is there another step I have missed?
Please tell me how to have my subscribed podcasts download automatically.
The only thing you can do is set your iTunes to check for new episodes frequently enough to catch all the new ones.
However, even this may not be enough. There is a BBC programme that releases up to three new episodes every day, all within one hour. So even once and hour will not catch all three of these. -
Performance degrading CPU utilization 100%
Hello,
RHEL 4
Oracle 10.2.0.4
Attached to a DAS (partition is 91% full) RAID 5
Over the past few weeks my production database performance has majorly degraded. I have not made any application, OS, or database changes (I was on vacation!). I have started troubleshooting, but need some more tips as to what else I can check.
My users run a query against the database, and for a table with only 40,000 rows, it will take about 2 minutes before the results return. For a table with 12 million records, it takes about 10 minutes or more for the query to complete. If I run a script that counts/displays a total record count for each table in the database as well as a total count of all records in the database (~15,000,000 records total), the script either takes about 45 minutes to complete or sometimes it just never completes. The Linux partition on my DAS is currently 91% full. I do not have Flashback or auditing enabled.
These are some things I tried/observed:
I shut down all applications/servers/connections to the database and then restarted the database. After starting the database, I monitored the DAS interface, and the CPU utilization spiked to 100% and never goes down, even with no users/application trying to connect to the database. The alert.log file contains these errors:
ORA-00603: ORACLE server session terminated by fatal error
ORA-00600: internal error code arguments: [ttcdrv-recursivecall]
ORA-03135: connection lost contact
ORA-06512: at "CTXSYS.SYNCRN", line 1
The database still starts, but the performance is bad. From the error above and after checking performance in EM, I see there are a lot of sync index jobs running by each of the schemas and the db sequential file read is high. There is a job to resync the indexes every 5 minutes. I am going to try disabling these jobs tihs afternoon to see what happens with the CPU utilization. If it helps, I will try adjusting the job from running every 5 minutes to something like every 30 minutes. Is there a way to defrag the CONTEXT indexes? REBUILD?
I'm not sure if I am running down the right path or not. Does anyone have any other suggestions as to what I can check? My SGA_TARGET is currently set to 880M and the SGA_MAX_SIZE is 2032M. Would it also help for me to increase the SGA_TARGET to the SGA_MAX_SIZE; thus increasing the amount of space allocated to the buffer cache? I have ASMM enabled and currently this is what is allocated:
Shared Pool = 18.2%
Buffer Cache = 61.8%
Large Pool = 16.4%
Java Pool = 1.8%
Other = 1.8%
I also ran ADDM and these were the results of my Performance Analysis:
34.7% The throughput of the I/O subsystem was significantly lower than expected (when I clicked on this it said to either implement ASM or stripe using SAME methodology...we are already using RAID5)
31% SQL statements consuming significant database time were found (I cannot make application code changes, and my database consists entirely of INSERT statements...there are never any deletes or updates. I see that the updates that are being made were by the index resyncing job to the various DR$ tables)
18% Individual database segments responsible for significant user I/O wait were found
15.9% Individual SQL statements responsible for significant user I/O wait were found
8.4% PL/SQL execution consumed significant database time
I also recently ran a SHRINK on all possible tablespace as recommended in EM, but that did not seem to help either.
Please let me know if I can provide any other pertinent information to solve the poor I/O problem. I am leaning toward thinking it has to do with the index sync job stepping on itself...the job cannot complete in 5 minutes before it tries to kick off again...but I could be completely wrong! What else can I check to figure out why I have 100% CPU utilization, with no users/applications connected? Thank you!
Mimi
Edited by: Mimi Miami on Jul 25, 2009 10:22 AMTables/Indexes last analyzed today.
I figured out that it was the Oracle Text indexes synching to frequently that was causing the problem. I disabled all the jobs that kicked off those indexes and my CPU utilization dropped to almost 0%. I will work on tuning the interval/re-enabling the indexes for my dynamic datasources.
Thank you for everyone's suggestions!
Mimi -
100% CPU utilization on svchost.exe or Automatic Updates service
We have upgraded from WSUS 2.0 to 3.0 SP1 and now have few Windows XP SP2 PCs that are extremely slow because the CPU is at 100% utilization running a process called "svchost.exe." If I go into services and stop and disable the "Automatic Updates" service the CPU drop to normal almost instantly. I tried forcing a reinstall of the Windows Update Agent. After I enable the "Automatic Updates" service the machine works fine for a day, than after a reboot it goes back to 100% CPU utilization. We need this fixed so we can get these computers updates.
Hi Ryan / Folks,
NO CA Products here - but I have had the same issues with Microsoft updates!
Here's the install path I used during my experience :
Cold install of XP with SP1 on the PC (Full factory system restore/rebuild).
Acer - Semperon 1.8GHz + 1GB RAM - 8Mb ADSL connection to Internet
XP SP2
Windows updates OK - used to install IE7
Reason - I found IE is compromised if you go straight to XP SP3
XP SP3
Next Office 2003 Pro
Switch to Microsoft updates - Custom Updates - SVCHost issue - Still checking for updates after 15 minutes
Switch back to Windows updates - Custom Updates - NO SVCHost Issue - Checking complete after 2 minutes
Tried both Microsoft fixes mentioned above
http://support.microsoft.com/kb/927891
Same report back - i.e. SP3 newer etc.
http://support.microsoft.com/kb/943144 - Method 2
Seems to install ok
Reboot PC
Swich back to manual Microsoft Updates and all is not really rosey as the initial "checking updates" scan can take at least 5 minutes with SVCHost at better than 90% CPU usage. So I believe the issue is not fixed, but it is just about useable.
Interestingly, no issues on my work LAN where I am the systems manager - 20 PCs and 8 servers using WSUS. All units are up to date and no SVCHost issues.
So.... No fix yet here, however my solution is as follows:
On the problematic PC I decided to switch back to Automatic Windows Updates. This keeps the PC up to date with all Operating System patches. Performance is not affected. I have decided that I will manually switch to the Microsoft update system once every couple of weeks or so to catch the updates for Office etc. I'll just have to set the updates scan running over a quiet period I suppose.
Plan B = Manual Office Updates http://office.microsoft.com/en-gb/downloads/default.aspx - Left Pane - Office Updates.
Hope this sheds some light.
Regards,
Knaphie
-
I just wanted to share my findings in case anyone else is having this problem.
I've been running WinXP Pro for months, but last night while trying to figure out my freezing/rebooting problem I figured I'd run a Hard Drive benchmark to see my CPU Utilization.
http://www.tcdlabs.com/hdtach.htm
Hd Tach 2.61
After running it I found that my CPU utilization was 54% !!!! That's crazy.
I have MSI KT333 Ultra....newest via 4in1 drivers.
I looked and it was running at DMA 5, bus mastering was enabled in the bios. At this point I was confused, I tried switching cables...reinstalling drivers...looking for tweaks....no go.
Finally I noticed on Via's page:
http://www.viaarena.com/?PageID=66
They have "IDE Miniport Driver".....figured what the heck....installed it, rebooted, and BAM! my CPU Utilization is down to 9%....much better.
Thanks for reading my rant. I encourage some of you to try out this benchmark and see what you get.
Adios!I don't think Speedfan gives you CPU Utilization during peak HD usage. That is something different.
-
Poor Rendering CPU utilization
Hi,
I just got my brand-new PC including a Intel Core i7 920 and ASUS P6T Deluxe V2 Motherboard running on Windos 7 RC. I created a demo project and exported a sequence to 1920i m2v format. I was very disappointed that the CPU utilization during the rendering process was only 20-25%. Same with rendering for preview within premiere itself. Is there any way to improve this?
- StefanCould there be a mistake somewhere? I ran the Sandra benchmark on physical disks and got these results:
With 6.00 ms access time your access time would be the same as a 15K SCSI-3 disk.
All the SATA disks, including my Areca raid show access times around 13 to 16 ms.
BTW, Sandra gave my raid a drive index of 1479 MB/s. It shows that interpreting these results from different benchmarks it a difficult job. The results vary so much between programs. For instance:
SANDRA: 1479 MB/s, but indicates the size correctly as 10 TB
HD Tune Pro: 745 MB/s, but indicates the size INcorrectly as 2199 GB
HD Tach: 802 MB/s
all on the same raid array. The same applies to access times, with Sandra 13.2 ms, with HD Tune Pro 9.1 ms. All my single SATA disks show around 13.5 ms access time in HD Tune Pro. The drive index for single disks do not vary as much, both Sandra and HD Tune Pro show around 91 MB/s.
From what I have seen it looks like HD Tune Pro is the most representative benchmark for disk performance, more so than Sandra. -
High CPU utilization in voice gateways
High CPU utilization during non-peak hours in all the gateways.
Process-http core is utilizing more CPU and it reaches to 99% and after sometime it automatically resolved and sometimes reload solves the issue.
We are using contact centre and back office calls.
Any reason why this is happening?
IOS version- 15.0(1)M9Hi Tagir,
We don't have ip http server and ip http secure-server command in our gateways.
No connections for the sh ip http client connections.
Please advice what could be the cause of the issue and also note that this is happening only in the late night when there is less call volume/no calls to the gateway.
Thanks... -
CPU utilization for GC...?? (Need Help)
In am currently investigating high CPU utilization of an application at certain peak times.
During the course of investigation, I was watching the Performance Monitor screen on the Weblogic Admin Console.
I noticed that the "Memory Usage" graph(Amount of memory available in the JVM Heap) is showing continuous set of spikes(a SAWTOOTH pattern) during the peak times of the application.
Now I am wondering if:
1) I can CONCLUDE that this is really GC happening multiple times, which is showing as the sawtooth pattern on the graph.
(I cannot turn on any verbose GC options, since the app is on production).
2) Does doing GC contribute to the User CPU or System CPU.
(Although the JVM i.e: Weblogic server was started as a user process, I want to know if GC is completely accounted only into the User CPU count).
3) What would generally be the contribution of GC to CPU usage. How much CPU could it consume (minor GC and Full GC). Could the contribution be really so large that my CPU usage graph peaks out(above 85%).
4) In case the answer for (3) is really large, then what should be my approach first..to increase New Gen size or to enable Parallel GC to use multiple CPUs (I have 2 CPUs and my GC options are default).
Please advice. I really am in a soup.Hi,
Yes, the sawtooth pattern shows that a GC has happened on every peak.
I assume that you run on top of some Linux distribution.
GC does contribute mainly to the value registered under User CPU unless you have limited physical memory on your machine where you could note an increase in System CPU during swapping.
Optimization could also contribute to high CPU usage, you can turn off optimization with -Xnoopt.
If you run with -Xgc:parallel (default with most JRockit versions), highest throughput is achieved when all CPUs concentrate on GC, thus generating a high CPU usage.
What JRockit version are you using? (Include -showversion in your commandline or run java -version.)
Kind regards, Cecilia
JRockit Customer Centric Engineering
Kind regards,
Cecilia Borg
BEA WebLogic JRockit -
CMS and Parallel GC consumes high CPU-Need Help
Hi,
We are using Hot Spot 64 bit JVM(java.runtime.version=1.6.0_26-b03,java.vm.version=20.1-b02),And in production we are facing a issue with long pause time during GC.While monitoring we also observed that CPU consumption(Almost >90%) during GC was very high.
Currently we use three 8 core 32 GB RHEL server each having total of 4 JVM with following config
Box(Server) 1:
1)2 online JVM with xms=xmx=4g and xmn=1g,GC-CMS,initialoccupationfrequency=50%
2)2 batch JVM with xmx=4GB,xms=512MB,GC-parallelGC
Box(Server) 2:
1)2 online JVM with xms=xmx=4g and xmn=1g,GC-CMS,initialoccupationfrequency=50%
2)2 batch JVM with xmx=4GB,xms=512MB ,GC-parallelGC
Box(Server) 3:
1)2 online JVM with xms=xmx=4g and xmn=1g,GC-parallelGC
2)2 batch JVM with xmx=4GB,xms=512MB GC-parallelGC
We are facing similar issue in all the three servers,At first we had CMS for all the online JVM's.We suspected CMS as the reason for CPU consumption so we swapped to ParallelGC on one box but still facing the same issue.We have a dependency from an external system,if the GC is more than 60 sec the extrenal system will disconnect.thisi is hampering our daily activities a lot.This issue is occuring during less load on the system with less network utilization Can any one help on this.
My quesstions
1)How much resource normally CMS or Parallel GC consumes?
2)Does having 4 JVM in a server causes this problem?What is the optimum to have?
3)What will happen if all the four JVM triggers GCHi,
We are using Hot Spot 64 bit JVM(java.runtime.version=1.6.0_26-b03,java.vm.version=20.1-b02),And in production we are facing a issue with long pause time during GC.While monitoring we also observed that CPU consumption(Almost >90%) during GC was very high.
Currently we use three 8 core 32 GB RHEL server each having total of 4 JVM with following config
Box(Server) 1:
1)2 online JVM with xms=xmx=4g and xmn=1g,GC-CMS,initialoccupationfrequency=50%
2)2 batch JVM with xmx=4GB,xms=512MB,GC-parallelGC
Box(Server) 2:
1)2 online JVM with xms=xmx=4g and xmn=1g,GC-CMS,initialoccupationfrequency=50%
2)2 batch JVM with xmx=4GB,xms=512MB ,GC-parallelGC
Box(Server) 3:
1)2 online JVM with xms=xmx=4g and xmn=1g,GC-parallelGC
2)2 batch JVM with xmx=4GB,xms=512MB GC-parallelGC
We are facing similar issue in all the three servers,At first we had CMS for all the online JVM's.We suspected CMS as the reason for CPU consumption so we swapped to ParallelGC on one box but still facing the same issue.We have a dependency from an external system,if the GC is more than 60 sec the extrenal system will disconnect.thisi is hampering our daily activities a lot.This issue is occuring during less load on the system with less network utilization Can any one help on this.
My quesstions
1)How much resource normally CMS or Parallel GC consumes?
2)Does having 4 JVM in a server causes this problem?What is the optimum to have?
3)What will happen if all the four JVM triggers GC -
QUESTION: How can I monitor in greater detail how my CPU is being utilized? Can you suggest a program, or can I do it directly on the iMac.
REASON FOR ASKING: Shortly after turning on my iMac (OS 10.5.5) the fans start running at a very high rate (about 3400 rpm for the CPU fan) and the iMac is very noisy. I have installed a widget the monitors the overall status of my CPU. This widget indicates approximately the following (there is some minor fluctuation): User = 100%, System = 0%, Nice= 0%, and Idle = 0%. So, it appears that some application or ??? is taking control of my iMac and "hogging" the CPU. Hence the need to get further granularity about the CPU's utilization.
YOUR DIAGNOSIS?: Have you seen similar problems before? Can you suggest possible causes and solutions?
ThanksApple provide just the thing you want: go to Applications>Utilities>Activity Monitor and choose "all processes". You will be shown exactly what function or application uses what amount of CPU, real memory and virtual memory, and who owns the process. You can also quit processes, or inspect them.
Hope this helps, -
ok guys i need help anyone with my ipod it froze during an update now it will not work at all i ahve put it into the recovery mode or dfu and it will not reset it self it comes up with an error message 1603 the number is and says the ipod cannot be reset anyone please help me i have tryed everything googled you tubed everything
Error 1604
This error is often related to USB timing. Try changing USB ports, using a different dock connector to USB cable, and other available USB troubleshooting steps (troubleshooting USB connections. If you are using a dock, bypass it and connect directly to the white Apple USB dock connector cable. If the issue persists on a known-good computer, the device may need service.
If the issue is not resolved by USB isolation troubleshooting, and another computer is not available, try these steps to resolve the issue:
Connect the device to iTunes, confirm that the device is in Recovery Mode. If it's not in Recovery Mode,put it into Recovery Mode.
Restore and wait for the error.
When prompted, click OK.
Close and reopen iTunes while the device remains connected.
The device should now be recognized in Recovery Mode again.
Try to restore again.
If the steps above do not resolve the issue, try restoring using a known-good USB cable, computer, and network connection.
Error 1600, 1601, 1602
Error 1603
Follow the steps listed above for Error 1604. Also, discard the .ipsw file, open iTunes and attempt to download the update again. See the steps under Advanced Steps > Rename, move, or delete the iOS software file (.ipsw) below for file locations.If you do not want to remove the IPSW in the original user, try restoring in a new administrator user. If the issue remains, Eliminate third-party security software conflicts.
Maybe you are looking for
-
Is there a way to disable header referals in Safari?
I can do this in Firefox, but I can't seem to figure out how to do it in Safari.
-
I created a smart group which includes all cards with a birthdate field. I want to print the group showing just the birthdates (I know how to do this). Anyway I can sort the list by birthdate??? Actually I would like it sorted by month and day. Thank
-
How to restrict use of network adaptors
Hello guys, I'm now setting up a small home server and at home we have right now the possibility of two different internet connections. I want to restrict one interface only to SSH/SCP (although I quite trust this connection still public IP seems as
-
I use InDesign CS 5.5. However, I use it ONLY for simple projects like creating a manual to be printed. I do not do anything fancy with it. Can I delete Adobe Bridge? I see this huge 178 GB application plus all of its support folders in my apps folde
-
How to alter file associations on Firefox for Mobile
When I click to download a .mid (midi) file, Firefox automatically launches an Autocad applicaion I have installed on my (Android) phone. Is it Firefox or the Autocad app that's taken control of that file extention ?