JPDA debug slow, CPU low, no disk activity

I tried to debug using JPDA with a Tomcat 4.0.3 target container. If I am very patient it finally connects after some good minutes. After that it debugs, even if rather slow.
However, during those minutes nothing seems to happen. CPU is low (under 5%), and there is no disk activity.
JDK is 1.3.1_02, W95 (yes, still), 256M.JPDA is really slow in Hotspot/Classic before JDK 1.4 (it's interpreting all the bytecode vs. running it natively). Try using classic if it's available instead of hotspot, it seems to be a bit faster at debugging.
Also, if you can, try JDK 1.4. It's JVM is MUCH faster at debugging than 1.3 is.
Hope this helps,
Rob

Similar Messages

Slow imac - too much disk activity

My wife's iMac is booting and running very slow. It takes close to 4 minutes for the boot process to complete. Once logged in applications start slow, run slow, and take forever to exit. Sometimes when quitting an application the application window will disappear but the menu bar will stay present with the Application pulldown name highlighted. The iMac at that point is locked up and the power button has to be used to shut it down.
What happened prior to this?
From what I can tell, a few days ago, while using Mail, it would crash. Then the iMac started booting slowly and running slowly. I am not sure which happened first. Yesterday, when running Mail a dialog box appeared stating that no accounts existed on the iMac. I recreated her account. However, it still booted slowly and continued to run slowly.
What I have tried:
I have used Cocktail to clear out DS Store, Cache files, and Repair Privileges. Cocktail hangs after running the Repair Privileges for about 2 minutes.
I have used Mac Scan 2 to search for possible ad/spy ware - it hangs when running.
I have booted from the 10.3 Installation CD and used Disk Utility to try to Repair Privileges. I was able to do that but had to run it several times before there were no more improper permissions assigned.
I have used Mac Janitor to run the 3 maintenance routines, Daily, Weekly, and Monthly. Daily ran fine. Monthly ran file. Weekly always hangs after running for about 2 minutes.
I have used TechTools and ran all tests available twice - all hardware passed both times.
I have used Terminal and run plutil on System and User preference files. No errors were reported.
I have disconnected all USB and Firewire devices. Only the keyboard and mouse that came with the iMac are connected to the iMac.
There also appears to be some type of disk activity always going on. It always has the same pattern:
click, click..........click
click, click..........click
click, click...click, click, click, click
click, click..........click
click, click..........click
click, click...click, click, click, click
I'm not saying the pattern is important, but the fact that it is consistent maybe.
Even at startup, as soon as the Apple logo appears, the same disk activity pattern can be heard.
Login was set to automatically login my wife. I changed that to require username and password. No change. Her account has admin privileges.
I then created a new administrator account and used it. The same slowness and disk activity results.
Any help would be greatly appreciated. The only thing I can think of to try at this point is to reinstall the operating system.
Sincerely,
Steve
iMac Mac OS X (10.3.9) 400MHz 512MB Memory

Right off the bat you need a much larger hard drive. Not nearly large enough and you don't have much free space left.
Re-read my previous suggestion. Don't run "Verify Disk", run "Repair Disk."
Without the SMART status you cannot tell if the drive noises indicate a failing drive, but inasmuch as you need at least a 30 or 40 GB drive I'd suggest replacing the drive.
You can also do some maintenance.
Kappy's Personal Suggestions for OS X Maintenance
For disk repairs use Disk Utility. For situations DU cannot handle the best third-party utilities are: Disk Warrior; DW only fixes problems with the disk directory, but most disk problems are caused by directory corruption; Disk Warrior 4.0 is now Intel Mac compatible. TechTool Pro provides additional repair options including file repair and recovery, system diagnostics, and disk defragmentation. TechTool Pro 4.5.2 is Intel Mac compatible; Drive Genius is similar to TechTool Pro in terms of the various repair services provided. The current version, 1.5.1, is Intel Mac compatible.
OS X performs certain maintenance functions that are scheduled to occur on a daily, weekly, or monthly period. The maintenance scripts run in the early AM only if the computer is turned on 24/7 (no sleep.) If this isn't the case, then an excellent solution is to download and install a shareware utility such as Macaroni, JAW PseudoAnacron, or Anacron that will automate the maintenance activity regardless of whether the computer is turned off or asleep.
OS X automatically defrags files less than 20 MBs in size, so unless you have a disk full of very large files there's little need for defragmenting the hard drive. As for virus protection there are few if any such animals affecting OS X. You can protect the computer easily using the freeware Open Source virus protection software ClamXAV. Personally I would avoid most commercial anti-virus software because of their potential for causing problems.
I would also recommend downloading the shareware utility TinkerTool System that you can use for periodic maintenance such as removing old logfiles and archives, clearing caches, etc.
For emergency repairs install the freeware utility Applejack. If you cannot start up in OS X, you may be able to start in single-user mode from which you can run Applejack to do a whole set of repair and maintenance routines from the commandline.
When you install any new system software or updates be sure to repair the hard drive and permissions beforehand. I also recommend booting into safe mode before doing system software updates.
Get an external Firewire drive at least equal in size to the internal hard drive and make (and maintain) a bootable clone/backup. You can make a bootable clone using the Restore option of Disk Utility. You can also make and maintain clones with good backup software. My personal recommendations are (order is significant):
1. Retrospect Desktop (Commercial - not yet universal binary)
2. Synchronize! Pro X (Commercial)
3. Synk (Backup, Standard, or Pro)
4. Deja Vu (Shareware)
5. PsynchX 2.1.1 and RsyncX 2.1 (Freeware)
The following utilities can also be used for backup, but cannot create bootable clones:
1. Backup (requires a .Mac account with Apple both to get the software and to use it.)
2. Toast
3. Impression
4. arRSync
Apple's Backup is a full backup tool capable of also backing up across multiple media such as CD/DVD. However, it cannot create bootable backups. It is primarily an "archiving" utility as are the other two.
Impression and Toast are disk image based backups, only. Particularly useful if you need to backup to CD/DVD across multiple media.
Visit The XLab FAQs and read the FAQs on maintenance, optimization, virus protection, and backup and restore.
Additional suggestions will be found in Mac Maintenance Quick Assist.
Referenced software can be found at www.versiontracker.com and www.macupdate.com.

Removing MacPorts fixed a lot of OS slowness and non-stop disk activity

I've read quite a few, individual posts, regarding Finder slowness, slow disk access, file copies ect. My HD did not stop grinding away since I installed Leopard a few days ago. Performance was terible and inconsistent. I removed about everything non-Apple I could think of, to no avail.
I remembered I installed PortAuthority and MacPOrts and set about removing them. After a reboot the HD is finally quiet. Things are approaching normal, despite the remaining "bugs" like print problems in Safari, slow application startup times, mail inconsistencies and slow boot times. This is the kind of stuff Apple can fix in a update or two, IMO.
Still, it seems that, with all of the beta testing going on, there could have been a formal "no fly zone" compiled somewhere, prior to the GM release.
Anyhow, if anyone else is experiencing bugginess in Leopard, look at what 'nix apps you might have installed in their not so ovbvious (hidden) directories. Perhaps they are plagueing your machine's performance.
Anyhow, I hope this proves useful to someone else.
cheers

I've read quite a few, individual posts, regarding Finder slowness, slow disk access, file copies ect. My HD did not stop grinding away since I installed Leopard a few days ago. Performance was terible and inconsistent. I removed about everything non-Apple I could think of, to no avail.
I remembered I installed PortAuthority and MacPOrts and set about removing them. After a reboot the HD is finally quiet. Things are approaching normal, despite the remaining "bugs" like print problems in Safari, slow application startup times, mail inconsistencies and slow boot times. This is the kind of stuff Apple can fix in a update or two, IMO.
Still, it seems that, with all of the beta testing going on, there could have been a formal "no fly zone" compiled somewhere, prior to the GM release.
Anyhow, if anyone else is experiencing bugginess in Leopard, look at what 'nix apps you might have installed in their not so ovbvious (hidden) directories. Perhaps they are plagueing your machine's performance.
Anyhow, I hope this proves useful to someone else.
cheers

Constant CPU and Disk Activity

I just upgraded my MBP from Tiger to Leopard, and also upgraded from trial to full .Mac account, so I now have an iDisk for the first time.
I have iStat Menus installed and where, before the upgrades, the CPU graph showed a very low level of activity (almost zero) when the computer was idle, it now looks like a picket fence, with spikes reaching almost to the top of the graph. The disk activity graph exactly matches the CPU graph with regular spikes, which occur about very 7-8 seconds.
I opened Activity Monitor, and the highest usage switches between 'Sync Server' (with a value of anything from 2 to 9) and 'kernel-task' (with a value of around 2.5). Something called 'mds' sometimes pops up to the top (with values of 2-3). It appears the culprit is 'Sync Server'. I've tried iDisk sync set to 'Manually', and also with it turned off altogether, but it makes no difference.
Does anyone know what's going on here and, more importantly, how to get my MBP to relax again.
Thanks in advance,
Steve = : ^ )

I'm resurrecting this question because the problem still exists. Restarting the computer always stops the spikes but they always start up again at some point (I'm yet to pinpoint a cause) and, once happening, I can quit all running apps (except Finder) and they persist, and they seem to occur about 10 secs. apart.
The spikes occur in both cores but, if one core has a big spike (close to 100%) the other's is small and vice versa. Or they both have moderate spikes. It seems the total usage is about the same for every spike, though spread differently between the two cores.
And the HD still shows activity at the same rate as the spikes.
Any ideas what I should look for?
Thanks in advance,
Steve = : ^ )
Message was edited by: Steve_Ball

Slow performance disk activity

My mac has slowed to almost a stop.
I hear lots of disk activity and when reviewing activity monitor I see lots of disk activity.
About 100 reads and writes a second
Any ideas of how to find out what is happening?

First, back up all data immediately, as your boot drive might be failing.
There are a few other possible causes of generalized slow performance that you can rule out easily.
If you have many image or video files on the Desktop with preview icons, move them to another folder.
If applicable, uncheck all boxes in the iCloud preference pane.
Disconnect all non-essential wired peripherals and remove aftermarket expansion cards, if any.
Otherwise, take the steps below when you notice the slowdown.
Step 1
Launch the Activity Monitor application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Activity Monitor in the icon grid.
Select the CPU tab of the Activity Monitor window.
Select All Processes from the menu in the toolbar, if not already selected.
Click the heading of the % CPU column in the process table to sort the entries by CPU usage. You may have to click it twice to get the highest value at the top. What is it, and what is the process? Also post the values for % User, % System, and % Idle at the bottom of the window.
Select the System Memory tab. What values are shown in the bottom part of the window for Page outs and Swap used?
Step 2
If you have more than one user account, you must be logged in as an administrator to carry out this step.
Launch the Console application in the same way you launched Activity Monitor. Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left.
Select the 50 or so most recent entries in the log. Copy them to the Clipboard (command-C). Paste into a reply to this message (command-V). You're looking for entries at the end of the log, not at the beginning.
When posting a log extract, be selective. Don't post more than is requested.
Please do not indiscriminately dump thousands of lines from the log into this discussion.
Important: Some personal information, such as your name, may appear in the log. Anonymize before posting. That should be easy to do if your extract is not too long.

Computer unresponsive with disk activity, even when disk is USB

Hi,
I've always had issues with responsiveness with Linux when there is disk activity (several distro's, same hardware), whereas a Windows XP installation reacts very snappily. When I have a torrent client open, Mplayer keeps hanging a few times a minute (even more often when the download is going fast (2 MB/s)).
Recently I migrated to ext4 in the hopes that would fix it, but it didn't. It's also not something as simple as a DMA issue (because it's SATA). Disk throughput is about 80 MB/s, which is OK.
Anyway, currently, I'm performing this on a USB disk:
dd if=/dev/zero of=/dev/sdc1 bs=10M
And even then the computer is almost unusable, which it shouldn't be, because the internal disks are not used for this. And some time back when I was copying an AVI to a USB stick, it was utterly unusable.
Maybe it's a driver issue, because I can't imagine the normal schedulers being so horrible, but I can't say.
My disk controller can't be accessed with AHCI (there is no 'native' option in the BIOS), yet NCQ is enabled:
# dmesg|grep -i ncq
[ 1.313605] ata3.00: 2930275055 sectors, multi 16: LBA48 NCQ (depth 0/32)
[ 1.800338] ata4.00: 2930277168 sectors, multi 16: LBA48 NCQ (depth 0/32)
[ 2.324738] ata6.00: 488395055 sectors, multi 16: LBA48 NCQ (depth 0/32)
I have kernel 3.1.1-1-ARCH, so I should have the 'wonder patch'.
Hardware:
CPU: Athlon X2 3800+ (2GHz dual core).
RAM: 2 GB DDR400 RAM.
Chipset: Nvidia nForce 4 ultra.
Disks (in MD RAID1): 2 WDC WD15EARS-00Z5B1 (disks have changed over the years) and 1 Seagate disk (which contains windows and is spun down in Linux, to prevent noise).
I disabled the (self-destructing) head parking feature of the caviar green disks with WDidle by setting the timeout to max (disabling the head parking with WDidle actually lets it trigger constantly, that's why I chose this way).
Lspci:
00:00.0 Memory controller: nVidia Corporation CK804 Memory Controller (rev a3)
00:01.0 ISA bridge: nVidia Corporation CK804 ISA Bridge (rev a3)
00:01.1 SMBus: nVidia Corporation CK804 SMBus (rev a2)
00:02.0 USB controller: nVidia Corporation CK804 USB Controller (rev a2)
00:02.1 USB controller: nVidia Corporation CK804 USB Controller (rev a3)
00:06.0 IDE interface: nVidia Corporation CK804 IDE (rev f2)
00:07.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f3)
00:08.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f3)
00:09.0 PCI bridge: nVidia Corporation CK804 PCI Bridge (rev a2)
00:0a.0 Bridge: nVidia Corporation CK804 Ethernet Controller (rev a3)
00:0b.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3)
00:0c.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3)
00:0d.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3)
00:0e.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
01:07.0 Multimedia audio controller: Creative Labs SB Audigy (rev 04)
01:07.1 Input device controller: Creative Labs SB Audigy Game Port (rev 04)
01:07.2 FireWire (IEEE 1394): Creative Labs SB Audigy FireWire Port (rev 04)
01:08.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11)
01:08.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11)
05:00.0 VGA compatible controller: nVidia Corporation G96 [GeForce 9500 GT] (rev a1)
# cat /proc/mdstat ( which shows no write intent bitmap to slow it down):
Personalities : [raid1]
md1 : active raid1 sda2[0] sdb2[1]
1464969720 blocks super 1.0 [2/2] [UU]
md0 : active raid1 sda1[0] sdb1[1]
156788 blocks super 1.0 [2/2] [UU]
unused devices: <none>
Anybody know what might be causing this?

I recently tried to play around with the schedulers and I found out that using "deadline" for my internal drives, "cfq" for my optical drive and "noop" for everything else. I tried copying a load of small files on my USB flashdrive while playing a movie from the optical drive and the system felt very responsive.
I've been playing some more, and you're right in that it seems that with the internal disks at deadline, the system is a lot more responsive. Previously, I put the external disk I was zeroing at deadline too, but that (I know now) made it worse again.
I run a 3.2-rc5 kernel which seems to help considerably though.
Has there been any specific change in that kernel to cause that?
BTW, I noticed that the NCQ queue on your drives is of 0 length, try setting it o 31 like this (as root).
I always wondered about the NCQ queue. In pages about NCQ that I found, the dmesg also reported a queue of 0. I just always figured it meant how many commands it currently had, being zero at boot time.
When I do "cat /sys/block/sda/device/queue_depth" it always says one, regardless of disk activity.

Disk Activity Problem w/ "update" Process

I'm having problems with unusal spikes in disk activity which causes everything I'm doing to pause until the activity is finished. If I'm browsing or switching between folders the app and OS pauses, if I'm watching a video, the video will pause while the audio will continue for a second before stopping.
My CPU, System Memory, and Disk Usage are all in a very low percentile of usage. There's no problem there.
The culprit I've determined is a process called "update" (process ID 89, user: root) At regular intervals "update" will appear on the list of active processes and it is exactly then, everytime, that the system will pause. The process never takes up more than 1% of my CPU.
Does anyone know what this process is and does? If I quit the process, will it stay off? Any information is helpful. I can't find anything about this specific problem anywhere.

I would begin looking at any of your 3rd party software, startupitems, background processes, Safe Boot, as well as cleaning the caches with Applejack.
Many programs and utilities have a "check for updates" feature.
And the more utilities you have running, to "monitor the health of _________" - they all affect system performance. Less is more. They can stumble over each other and even outright conflict.
I would also be concerned with the health of the drive directory and folders and the size of the largest folders (there is still a limit of something like 2048 items per folder which will affect open-save and navigating).
If you have Disk Warrior 4, use it, if you don't, consider it a good investment (just like good backups) for preventative maintenance, not just after there is a problem.

Slow cpu after new SEcurity UPdate

i installed the newest security update on friday and ever since then my mini has been giving me heck. spinning beachballs abound. almost every app has a distinguished pause before loading. safari is definitely slower at handling incoming images, text, whatever. oh yeah the biggest pauses seem to occur when a program attempts to access a folder on my hard drive.
anybody else experiencing these problems?
any possible fixes? (please do not say repair disks)
any way of taking away this security update? -truthfully i would rather have a well functioning computer than be "secure"-

I am also seeing this, with initial onset of symptoms correlating with installing the latest security update. Boot goes quickly until it gets to "Login window starting", whereupon it stays there for over 2 minutes. It takes 30 seconds to open a finder on the drive and another 30 seconds for that window to display its contents. Switching focus between applications and pulling down menus takes seconds, though the application processing itself appears zippy.
iostat reports the cpu remaining about 98% idle and little disk activity.
This suggests to me that there is some problem in either the window manager or its communication with applications.

E530 100% disk activity

My new E530 often runs so slowly, it's a joke. When this happens, I see the disk activity is at 100% for long periods of time, sometimes for hours, even when I'm not using the machine, or only doing light internet browsing and using MS Office.
During those periods, CPU is running at about 10% and memory at about 55%.
I do not use my computer for gaming or any intensive applications.
How can I stop the disk activity running at 100%?

Hi Adeleg,
Welcome to Lenovo Community Forums!
I’m sorry to hear that you are facing the issue with System slow performance on ThinkPad E530.
1. Verify whether the problem occurs intermittently or frequently
2. Verify whether the problem occurs at some certain occasions or under some conditions. Figure out specific slow environments; check is it slowing during startup, slow during playing game, slow during surfing internet.
3. Make sure that the current configuration meets the recommended configuration of the current OS. Remove all external devices and restore factory default hardware configurations by uninstalling all non-bundled devices.
4. Check LSC -Performance and Configuration History - Critical Events (for faulting applications); For machine running Windows 7 / Vista without using LSC, use Windows Realiability monitor to check (command line to run: perfmon /rel).
5. Check if the system is getting more heating while in use.
6. Run complete anti-virus scan.
7. Run HDD and Memory diagnostics.
8. If problem persists, advise to restore preload operating system.
Hope this helps. Do post back if issue persists!
Best regards,
Hemanth Kumar
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Firefox is using large amounts of CPU time and disk access, and I need to know how to shut down most of this so I can actually use the browser.

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

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

"Disk Activity" monitor for multiple hard drives?

Is there something like "Disk Activity" in the Activity Monitor utility to show which hard drive is accessed? I put a SSD in my Mac Pro but it occasionally hesitates for a few seconds as if it's accessing a file on one of the other three (slower) hard drives. I want to see a list of files that it needs that aren't on the SSD, so I can move them over and speed up my computer, or remove the extra hard drive eventually.

Yes, it's possible.
However for the maximum length I have not figured out.
I haven't found a reason to go past 16 characters.

Excessive disk activity with Safari 3.2.1

Since updating to Safari 3.2.1 on os 10.4.11, my hard disk begins a lengthy bout of intense disk activity within a minute or two of opening Safari. It just keeps chunking away, and it only stops when I quit the browser. This happens whether or not I load any pages.
Looking at Activity Monitor when this is happening, it is clearly Safari that is causing the excessive disk activity. And during these periods, Safari is using 15% to 30% CPU.

I see the same thing:
http://img.skitch.com/20090212-pbe1s4wprd6rjmjiq3sfe1s961.jpg
It just plugs away, using 33% of CPU. Very small network usage.
What is it doing? As for 'resetting' it, what do you mean? Just quit and restart Safari? OK, but this happens consistently.
Any thoughts?
Safari Version 3.2.1 (5525.27.1)
Message was edited by: Tor Lundgren

X very sluggish during disk activity...

Hi,
Recently, X has become very sluggish when disk activity is taking place. It doesn't seem to matter if it's a read or write operation. The pointer freezes and judders across the screen and everything basically stops until the disk access is finished. Usually this is only a problem with large data transfers, but if i'm backing up files or compressing archives it's really annoying! Transfers to USB disks have the same effect.
Does anyone have any idea as to why this may be happening?
Thanks
Dan

I have had mixed results with hdparm - in particular enabling dma seems to help but I have an hdparm line in my rc.local and if I try to enable dma there I get a system lock-up on boot when the command is executed.
Not a memory issue - It's not the most recent laptop but has 1gb of RAM. I've been using ARCH since 2004 and this problem seems to be recent (in the past six months or so) but I can't seem to find any cause for it.
Does anyone know of any changes to the Kernel? I'm using anticipatory scheduling at the moment but have also used CFQ and the results when it comes to disk access slow-down are about the same.

Disk activity led

Is it normal that the disk activity led on the right side of my notebook (a lenovo 3000 N500 4233-5MG)
is blinking regularly even if there is no disk activity ?
I have installed a dual boot system with both Windows XP and Solaris 10 but I observed that there is no difference,
the led is always blinking.

Hi @Working_Stiffie
Welcome to the HP Forums!
It is a superb place to find answers and ideas!
For you to have the best experience in the HP forum I would like to direct your attention to the HP Forums Guide Learn How to Post and More
I see you recently had the power connector cable replaced and now the LEDS in the lower left do not light up. You are uncomfortable disassembling the notebook. It is most likely a loose or not connected cable as you said. As you just had it repaired I would take it back to the repair shop and advise him of the situation. He should be able to correct it for you.
Here is a link to HP G50 Notebook PC and Compaq Presario CQ50 Notebook PC Maintenance and Service Guide that will go over removal procedures if you would like to attempt this yourself.
Good Luck and Happy Holidays!
Sparkles1
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Constant disk activity; who is doing that?

Hello there,
I pimped my G5 with two new internal drives (WD 1TB Caviar Black) and copied onto them clones of other disks and volumes (with SuperDuper), including my old system. Seems to be quite succesful operation; nearly all works as usual again.
Of course I expected mdimport to do some heavy indexing, with constant disk activity as a result.
But, after a couple of days, there is still constant disk activity: every second or so some 5,99MB is being written to disk, according to Activity Monitor.
I do not understand which app is doing this, for no one seems to be very busy at all.
Any ideas out there?
Appreciated,
Marius

I just dealt with this problem effectively on my Mac Pro (Snow Leopard 10.6.4), after considerable mucking around. Hard drive noise, flashing lights, system slow-downs, all driving me nuts (admittedly, a short drive).
Turned out to be Spotlight. As it happens I have a WD Studio 1-terabyte Firewire drive that's always hooked up. I back up to it several times a day when I'm on a project, and it has clones of my application drive and three data drives, all visible on my desktop. I also have a separate Windows drive that's visible. Recently, for reasons known only to Apple, I'm sure, Spotlight began indexing and re-indexing the cloned logical drives on the WD Studio. Never stopped -- as soon as it finished, it would start again. I simply went into the Privacy tab of the Spotlight preference pane from System Preferences, made sure that all my drives appeared in the box, and then removed all four cloned drives and the Windows drive so that Spotlight would no longer index them.
Problem solved. If you have extra physical or logical drives beyond those actually in your system (as opposed to Firewire or USB drives), try removing them and re-adding them in the Privacy tab of the Spotlight preference pane. Then wait for Spotlight to re-index the drives -- could take a bit of time, and the drives will keep accessing until re-indexing is complete. If that works, you're good. If it doesn't and the process just keeps going, you might have to remove permanently the external drives and clones from the list of drives to be indexed. That's what I ended up having to do.
Hope this helps.

JPDA debug slow, CPU low, no disk activity

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