Really slow disk access
our iMac runs like a dog. I've max'd RAM, cleaned and optimized the hard drive. Configured with two non-admin users (myself & my wife - I need right-click but it drives here crazy), and an admin account. iTunes and iPhoto libraries are shared, and they are stored on an external 500g drive. in addition we have TimeMachine active to a 2tb drive thru. External drives are connected thru the USB hi-Speed bus.
Examples of slow: up to a minute to switch users, 10-20 seconds for a cursor in Spotlight, Safari takes about a minute to get "warmed up".
I decided to do a clean install of Mavericks - all previous updates/upgrades were automated via Apple and/or AppStore.
So I'm creating a redundant backup of folders on the internal drive (everything except movies, music, & photos which are on the 500g and backed up via TimeMachine on the 2tb drive). in total only 172g to copy to another 1tb drive.
I started last night, but it went to sleep and did not work all night. in total it's been working 4-6hrs last night and 8hrs today. There is still 22hrs to go!
Is there any hope for this machine?
Larry :-)
========
I watch Activity Monitor a lot, CPU never really seems to be stressed, nor the Disk. While I don't know how to read the Memory monitor, "memory presure" is typically stable at about 25%.
The terminal showed 0.0 pages written to the pagefile - taken while only doing back-up and Activity Monitor, no real change now that I'm also in Safari.
EtreCheck results:
Hardware Information:
iMac (24-inch, Early 2008)
iMac - model: iMac8,1
1 2.8 GHz Intel Core 2 Duo CPU: 2 cores
4 GB RAM
Video Information:
ATI Radeon HD 2600 Pro - VRAM: 256 MB
Audio Plug-ins:
BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
AirPlay: Version: 1.9 - SDK 10.9
AppleAVBAudio: Version: 2.0.0 - SDK 10.9
iSightAudio: Version: 7.7.3 - SDK 10.9
Startup Items:
MySQLCOM: Path: /Library/StartupItems/MySQLCOM
System Software:
OS X 10.9 (13A603) - Uptime: 27 days 2:48:17
Disk Information:
Hitachi HDP725032GLA380 disk0 : (320.07 GB)
EFI (disk0s1) <not mounted>: 209.7 MB
Macintosh HD (disk0s2) /: 319.21 GB (124.84 GB free)
Recovery HD (disk0s3) <not mounted>: 650 MB
USB Information:
Apple Inc. Built-in iSight
Western Digital Ext HDD 1021 2 TB
disk5s1 (disk5s1) <not mounted>: 32 KB
Teri-02 (disk5s3) /Volumes/Teri-02: 2 TB (1.12 TB free)
Canon MP480 series
Western Digital My Book 1148 2 TB
disk3s1 (disk3s1) <not mounted>: 32 KB
2Teri BckUp (disk3s3) /Volumes/2Teri BckUp: 2 TB (1.32 TB free)
Apple, Inc. Keyboard Hub
Apple, Inc Apple Keyboard
Apple Computer, Inc. IR Receiver
Apple Inc. BRCM2046 Hub
Apple Inc. Bluetooth USB Host Controller
FireWire Information:
WD Passport III 800mbit - 800mbit max
EFI (disk1s1) <not mounted>: 209.7 MB
Passport HD (disk1s2) /Volumes/Passport HD: 499.76 GB (100.89 GB free)
Thunderbolt Information:
Kernel Extensions:
Problem System Launch Daemons:
[failed] com.apple.wdhelper.plist
Problem System Launch Agents:
Launch Daemons:
[loaded] com.adobe.fpsaud.plist
[loaded] com.livescribe.PenCommService.plist
[loaded] com.macpaw.CleanMyMac2.Agent.plist
Launch Agents:
User Launch Agents:
[loaded] com.google.keystone.agent.plist
[loaded] com.macpaw.CleanMyMac2Helper.scheduledScan.plist
[loaded] com.macpaw.CleanMyMac2Helper.trashWatcher.plist
[loaded] com.valvesoftware.steamclean.plist
User Login Items:
Dropbox
3rd Party Preference Panes:
Flash Player
Internet Plug-ins::
Flip4Mac WMV Plugin: Version: 2.3.3.3
FlashPlayer-10.6: Version: 11.9.900.170 - SDK 10.6
QuickTime Plugin: Version: 7.7.3
Flash Player: Version: 11.9.900.170 - SDK 10.6
Default Browser: Version: 537 - SDK 10.9
wkDimdimControl: Version: 1.01
GarminGpsControl: Version: 4.0.3.0 Release - SDK 10.6
Silverlight: Version: 5.1.10411.0 - SDK 10.6
iPhotoPhotocast: Version: 7.0
User Internet Plug-ins::
CitrixOnlineWebDeploymentPlugin: Version: 1.0.94
Bad Fonts:
None
Old applications:
Bluetooth Diagnostics Utility: Version: 2.3.6 - SDK 10.0
/Developer/Applications/Utilities/Bluetooth/Bluetooth Diagnostics Utility.app
Bluetooth Explorer: Version: 2.3.6 - SDK 10.0
/Developer/Applications/Utilities/Bluetooth/Bluetooth Explorer.app
BodyMedia SYNC: Version: 1.0.1 - SDK 10.5
/Applications/BodyMedia SYNC.app
CrashReporterPrefs: Version: 10.6.3 - SDK 10.0
/Developer/Applications/Utilities/CrashReporterPrefs.app
Dashcode: Version: 3.0.2 - SDK 10.0
/Developer/Applications/Dashcode.app
IBCarbonSimulator: Version: 4.0 - SDK 10.0
/Developer/Platforms/MacOSX.platform/Developer/Library/Interface Builder/Plug-ins/CarbonPlugin.ibplugin/Contents/Resources/IBCarbonSimulator.app
IBCocoaSimulator: Version: 4.0 - SDK 10.0
/Developer/Platforms/MacOSX.platform/Developer/Library/Interface Builder/Plug-ins/CocoaPlugin.ibplugin/Contents/Resources/IBCocoaSimulator.app
Instruments: Version: 4.0 - SDK 10.0
/Developer/Applications/Instruments.app
Keynote: Version: 5.3 - SDK 10.5
/Applications/iWork '09/Keynote.app
Livescribe Desktop: Version: 2.8.3 - SDK 10.5
/Applications/LivescribeDesktop.app
Numbers: Version: 2.3 - SDK 10.5
/Applications/iWork '09/Numbers.app
OpenGL Driver Monitor: Version: 1.5 - SDK 10.0
/Developer/Applications/Graphics Tools/OpenGL Driver Monitor.app
OpenGL ES Performance Detective: Version: 1.0 - SDK 10.0
/Developer/Applications/Graphics Tools/OpenGL ES Performance Detective.app
OpenGL Profiler: Version: 4.4 - SDK 10.0
/Developer/Applications/Graphics Tools/OpenGL Profiler.app
OpenGL Shader Builder: Version: 2.1 - SDK 10.0
/Developer/Applications/Graphics Tools/OpenGL Shader Builder.app
PacketLogger: Version: 2.3.6 - SDK 10.0
/Developer/Applications/Utilities/Bluetooth/PacketLogger.app
Pages: Version: 4.3 - SDK 10.5
/Applications/iWork '09/Pages.app
Plants vs: Version: 1.0.40 - SDK 10.5
/Applications/Plants vs. Zombies.app
Quartz Composer: Version: 4.0 - SDK 10.0
/Developer/Applications/Quartz Composer.app
Quartz Composer Visualizer: Version: 1.2 - SDK 10.0
/Developer/Applications/Graphics Tools/Quartz Composer Visualizer.app
Quartz Debug: Version: 4.1 - SDK 10.0
/Developer/Applications/Performance Tools/Quartz Debug.app
SLLauncher: Version: 1.0 - SDK 10.5
/Library/Application Support/Microsoft/Silverlight/OutOfBrowser/SLLauncher.app
Spin Control: Version: 0.9.1 - SDK 10.0
/Developer/Applications/Performance Tools/Spin Control.app
Syncrospector: Version: 5.2 - SDK 10.0
/Developer/Applications/Utilities/Syncrospector.app
USB Prober: Version: 4.0.0 - SDK 10.0
/Developer/Applications/Utilities/USB Prober.app
Xcode: Version: 4.0 - SDK 10.0
/Developer/Applications/Xcode.app
Xcode SSH Authentication Agent: Version: 4.0 - SDK 10.0
/Developer/Library/PrivateFrameworks/IDEFoundation.framework/Versions/A/Re sources/Xcode SSH Authentication Agent.app
Yasu: Version: 2.8.2 - SDK 10.4
/Applications/Utilities/Yasu.app
YummySoup!: Version: 2.4 - SDK 10.5
/Applications/YummySoup!.app
Time Machine:
Skip System Files: NO
Mobile backups: OFF
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 297.29 GB Disk used: 181.03 GB
Passport HD: Disk size: 465.44 GB Disk used: 371.48 GB
Destinations:
2Teri BckUp [Local] (Last used)
Total size: 2
Total number of backups: 64
Oldest backup: 2013-08-05 12:04:28 +0000
Last backup: 2013-12-28 02:32:06 +0000
Size of backup disk: Adequate
Backup size 2 > (Disk used 552.50 GB X 3)
Time Machine details may not be accurate.
All volumes being backed up may not be listed.
Top Processes by CPU:
3% WindowServer
1% EtreCheck
1% Finder
1% Activity Monitor
0% sysmond
Top Processes by Memory:
188 MB Safari
160 MB Locum
123 MB mds_stores
78 MB Mail
70 MB softwareupdated
Virtual Memory Statistics:
54 MB Free RAM
1.25 GB Active RAM
1.22 GB Inactive RAM
581 MB Wired RAM
13.12 GB Page-ins
965 MB Page-outs
Similar Messages
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Qosmio X505-Q870 with "slow" disk access
i"ve got a several month old X505 870 with 4GB of memory and TWO Hitachi 7200 rpm 500GB SATA II hard drives. The system is used primarily for initial examination of digital images, with each image being around 20MB. Accessing images to display previews is perceptibly slow. YES, the system is tuned to the best of my ability. YES, both disks have been, and are REGULARLY defragmented - both show 0% fragmentation. YES, I've thrown away the original O/S with all the trialware, stupidity, and goop, and installed W7, 64-bit. YES, all the drivers I'm aware of are current, including the Intel storage drivers. NO, other than the periodic Side-By-Side errors that show up every couple days, I'm NOT getting application or system errors.
In Bridge or Lightroom I"m not getting CPU bound, but this thing beats on the disk(s) quite a bit, and takes MUCH longer than the desktop system to display images. YES, the desktop is a slightly faster CPU, but it
also has standard 7200 rpm drives for images, and it's SIGNIFICANTLY faster at retrieving and displaying images in Bridge or Lightroom...
Is there any PRACTICAL (no, putting in 2, 500GB SSD drives is NOT practical) thing that can be done to improve disk performance on this box, 'cause right now it certainly isn't any speedster?I don't have any empirical evidence about whether the original installation was this slow, but my recollection is the reason I dumped an re-installed a clean W7 was because the original was REALLY a dog. I also wanted to put partitions on the drives and the original installation caused problems with the partitioning... But, I'm confident that the original was definitely not faster...
As far as drivers, I believe I have everything current.
My antivirus is Microsoft Security Essentials, but I currently have it turned off. So that's probably not the issue.....
As far as "is it really slow", I can't say. It's SLOWER, but I suppose if you're not doing anything very demanding it'd probably be all right. It's just significantly slower doing what I do, than my desktop. I don't have anything else to compare it to, but it SEEMS (the ever popular "seems") to me that a quad-core with 4GB of memory and 7200 rpm drives should be extremely quick to pull up images and render previews. But, I'll admit my expectations may be too high.
Which is why I'm hoping there's something I've neglected that'll make things perform better. I even dumbed down the interface with the "best performance versus best appearance" thing to see if that'd help. Didn't. -
Extremely slow disk access iMac5.1
Hello, my daughter is having problems with her computer. She has a Mac5.1 ( intel ) running 10.4.11.
In the process of trying to determine the problem, I installed Xbench on her computer. The numbers for the disk access category are dismal, all others (although low) appear normal.
This disk values are:
Sequential 0.03
Uncached Write 0.01 0.01 MB/sec [4K blocks]
Uncached Write 0.17 0.10 MB/sec [256K blocks]
Uncached Read 60.40 17.68 MB/sec[4K blocks]
Uncached Read 86.73 43.59 MN/sec[256K blocks]
Random 1.35
Uncached Write 15.89 0.01 MB/sec [4K blocks]
Uncached Write 0.35 0.10 MB/sec [256K blocks]
Uncached Read 63.58 17.68 MB/sec[4K blocks]
Uncached Read 99.67 43.59 MN/sec[256K blocks
Aparently sequential access is much worse that random access however Apple utilities as well as Onyx claims that the disk is fine. However the computer is nearly unusable. What else can I try? I ran an fsck on the disk, I also caused the write permissions to be corrected. I am running out of ideas.
BTW her disk is a WDC WD160JS-40TGB0. Out of 148 Gig, 110 are used and about 40 are free.
Any Ideas? Any help is greatly appreciated.How much RAM does the iMac have and how many Applications are running concurrently or set to open at login?
40GB should be ample free space for V-RAM, but it could definitely get bogged down if there is to little RAM for the users needs.
Sometimes one will inadvertently set a bunch of stuff to automatically open at login. Go to: Apple > System Preferences > Accounts > Login Items and remove any unnecessary Application automatically set to open at login-in and then restart the computer.
Then again it could be that the HD is just suffering from age, if it has been thrashed because of continual page outs due to the lack of system memory. Because my Earlier 2006 Mac4,1 with 2GB of RAM that I upgraded (for space reasons) to a WD 320GB Hard Drive in 2009 is getting:
Disk Test
55.08
Sequential
47.67
Uncached Write
177.90
109.23 MB/sec [4K blocks]
Uncached Write
175.61
99.36 MB/sec [256K blocks]
Uncached Read
14.73
4.31 MB/sec [4K blocks]
Uncached Read
211.81
106.45 MB/sec [256K blocks]
Random
65.23
Uncached Write
25.42
2.69 MB/sec [4K blocks]
Uncached Write
182.78
58.51 MB/sec [256K blocks]
Uncached Read
93.31
0.66 MB/sec [4K blocks]
Uncached Read
172.38
31.99 MB/sec [256K blocks]
Dennis -
Macbook pro mid-2012 13" has very slow disk access
Until 3 days ago my macbook pro mid-2012 13" running OX 10.8.3 was running fine. Then, it showed very slow response anytime it had to access the hard disk. After doing the usual checks and disk first aid repairs to no avail, I booted from my external disk with an older copy of my hard disk and everything then worked as normal, except when I accessed the internal hard disk, then it crawled once again (spinning beach ball, took many seconds just to open a finder window and then several minutes to display the contents). I ran the Apple Hardware Tests and it said everything was fine, even though it tooks several minutes before the test would actually start. I also ran the program BlackMagic Speed Disk to find out if the disk was having transfer speed problems and it showed a respectible transfer rate (60MB/s), not great but not like the 0.3MB/s I was getting when I tried to back up the internal disk. I was using Carbon Copy Cloner to try to back up the internal disk but had to give up since at 0.3MB/s, it would take days to back up the 250GB on the disk. I found on the web that using "restore" in Disk Utility, I could do a disk copy without the file by file copy which allowed me to back up my disk in "only" 6 hours. Booting from my newly made copy on an external disk worked fine and ran at nearly normal speed (slightly slower since it was an external disk running through USB2). As a final attempt to prove this was a disk problem, I erased the internal disk and reinstalled OSX 10.8. I am still waiting for this install to finish, it has been 5 hours although the progress bar said it should be done in 20 minutes. This was fairly convincing evidence that it is not a software or settings problem. However, all my web searches could find no other case of a problem like mine. I presume I have a failed hard disk but as all the diagnostic programs say it is working fine, I was hesitating to bring it in without hard diagnostic evidence. If anyone knows what might be the problem, it would be much appreciated to hear from you.
It should not take 5 hours to install Mac OS X. There is something wrong with the disk. Try reformatting where you do a wipe of the drive (an select the option to write zeros which will remap bad sectors). Then try to install MAc OS X.
I got this information from here:
http://reviews.cnet.com/8301-13727_7-20064489-263.html
Back up your data.
Use Time Machine or a system cloning utility to create a full and restorable backup of your data. If you suspect bad blocks, then when cloning you might consider not using a "block-level" copy process, since this will likely run into problems.
Boot to the utilities DVD.
If you have a boot DVD for a tool like Drive Genius or another drive utility, then boot to that; if not, use your OS X installation DVD (once you select your language, open Disk Utility from the Utilities menu).
Format the drive.
Using your selected utility, format the drive and check for bad blocks. If you are using Disk Utility, click the Erase tab, click the Options button, and then select the option to write zeros to the disk (you do not need to do multipass erase options, as this will provide no additional benefit for managing bad blocks). Writing to zeros may take a couple of hours depending on the size of the drive, but when done the drive will have remapped any blocks that were not reliably read.
Restore the OS installation.
If you have used Time Machine to create your backup, boot to your OS X installation DVD (if you are not using Disk Utility) and use the option in the Utilities menu to restore from backup. Attach your Time Machine drive and then proceed with the restoration, selecting the newest backup as the one to restore to your system. If you have used a system cloning tool, then attach the cloned drive and boot off of it (hold the Option key at start-up to select it from the boot menu). When you are booted to the cloned drive, run your cloning utility to copy the installation back to the computer's main boot drive.An optional approach here is to perform a full reinstallation of the OS from your installation DVD, and then migrate your data, applications, and settings from either the clone or the Time Machine backups using Apple's Migration Assistant. -
Extremely Slow Disk Access from External Drives (USB & Firewire)
Following the upgrade to 10.6.2 (from 10.6.1), my computer is communicating extremely slowly with all external drives (both Firewire 400 and USB). File transfers which used to take less than a minute now take 5-10 minutes (less than 1 GB). Peering into the Console, I see messages for each aspect of a file reading: Nov 13 12:30:12 Nautilus /System/Library/CoreServices/Finder.app/Contents/MacOS/Finder[152]: Possible unresolved transaction race -105/filename
(Nautilus is the name of the computer)
By "each aspect", I mean that for Pages files, it provides a message for Quicklook,(null) , Contents,(null) , and filename,(null).
All disks are in good health, formatted as FAT32 for ease of use with all OS types, and are SATA.
Again, this occurred immediately following the installation of 10.6.2 (both Software Update and Combo). I've seen similar errors online with iTunes libraries on network drives, but this is on directly connected drives.
I normally wouldn't ask this, but, is there a way to reinstall 10.6.1 over .2? At this point, Time Machine would likely cause me to lose other data as well in a full revert, since it has been more than a few days.I have various personal files backed up on these drives (not system data): music, pictures, documents, etc.
FAT32 should not be an issue, as I have used these drives for over 2 years with Tiger, Leopard, and then Snow Leopard with nay an issue, until now. Additionally, while the Time Machine backup may be an archive, it is the sole occupier of an HFS-formatted partition which is not exhibiting the issue. I only included that information since it is physically on the same drive as a partition (FAT32) which is being troublesome to rule out driver/hardware problems.
Bottom line: All of my drives worked perfectly on 10.6.1 (and continue to do so on my other Macs (10.5.8), but do not on 10.6.2. I was only looking for a potential solution to my computer's specific issue, not a statement that my "compromise" is the cause of my problems.
Actually, since Apple fully supports read/write access on FAT32 partitions, I should, indeed, be able to "have all things all ways...", no offense intended. -
Hi,
I have a Dual 2.5 Ghz PowerPC G5, which has two 250GB hard disks. I also have a Lacie 250GB Firewire hard disk installed. I am using Mac OS X 10.4.4.
When use this computer the CPU and disk performance are OK. However, whenever and application uses a File Open dialog to find or save files the dialog (such as with Macrosoft Word, Macromedia Flash etc) is incredibly slow. It can take up to a minute before the application will find all the files and display them. This is incredibly frustrating. I mean, I hardly have any files! Is there anyway to fix or resolve this problem?
Thanks, David.1. Did you try the advice in my FAQ w.r.t. Energy Saver settings? The spin-up noise may be too low for you to hear: some drives are nearly dead silent in this respect.
2. There are only two other things I can suggest:
- Open Activity Monitor (in Applications > Utilities). Sort processes in descending order by %CPU and monitor it when the problem occurs.
- Check Console for clues after the problem occurs.
Good luck!
Dr. Smoke
Author: Troubleshooting Mac® OS X
Note: The information provided in the link(s) above is freely available. However, because I own The X Lab™, a commercial Web site to which some of these links point, the Apple Discussions Terms of Use require I include the following disclosure statement with this post:
I may receive some form of compensation, financial or otherwise, from my recommendation or link. -
Hyper V guest slow disk access
I have a Hyper V cluster(2012) with a 2012 guest running 2012 acting as my file server.
My 2 hosts are connected to a gig switch stack which in turn is connected to my Dell MD3200i.
My file server has a "data" disk that is a VHD(fixed) on the iSCSI storage. As is it OS(dynamic)
I'm coping 200GB right now and only seeing data thoughtput of 8MB/sec.
When I check perfrmance on the file server the disk queue is huge. But when I check the queue for C: on the host, which is where the cluster storage appears to sit, its got a low if not no queue.
Also did a copy using the host and saw 58MB/sec so I'm happy the network should be able to pass the data.
Switch CPU is at 5%
Can anyone tell me what I'm doing wrong?Fixed VHD always performs better than Dynamic VHD in most scenarios by roughly 10% to 15% within the exception of 4K writes, where fixed VHD performs significantly better according to the Windows Server Performance Team Blog.
Hyper-V and VHD Performance - Dynamic vs. Fixed:
http://blogs.technet.com/b/winserverperformance/archive/2008/09/19/hyper-v-and-vhd-performance-dynamic-vs-fixed.aspx
Witch doesn't match your tests, so I think you missed something in your configuration schema. Read the following guideline:
Performance Tuning Guidelines for previous versions of Windows Server:
http://msdn.microsoft.com/en-us/library/windows/hardware/dn529134
Regards,
If you found this post helpful, please give it a "Helpful" vote. If it answered your question, remember to mark it as an "Answer". This posting is provided "AS IS" with no warranties and confers no rights! Always test ANY
suggestion in a test environment before implementing! -
Recently I've had to restart my PB multiple times in order for it to start up because it just sits with the Apple logo and the circle going. I booted from a backup drive, no problem, but when I attempted to reformat the drive via Disk Utilities, it would not allow it. DU went into 'not responding' mode. Now when I boot, it takes forever and there is a tremendous lag time. How do I determine if there is an actual hardware error with the drive or if Disk Warrior would be able to correct the problem (I would have to buy DW)?
You may have a cache overload.
Make sure your reset Safari if that is your bowser all the time and empty the caches on it and also on any third party software.
I empty my caches all the time on Safari, yet it still shows up I need to clean it using my NetBarrierX4. You may also empty temporary files.
And I have resorted to taking my battery out to reset my logic board when I can't fix things.
Adware and Malware and spyware and trojans can cause this also.
I reset Safari everyday. Go to Safari preferences or any brower you use and reset to empty caches....and then go to system preferences and click on security and delete any cookies. Cookie cleaning is very important...at least for me.
Let me know if any of these things work.
Worms can also cause it. -
Time Capsule disk access SLOW! 2TB - Dual band
I have a Time Capsule (2TB, Dual Band, Firmare at 7.4.2)
Its been working like a dream, backing up 3 Macs for the last 8 months.
I also use it for connecting two or three other disks via USB and then making those accessible over the LAN, and there is also about 100GB of data on the Time capsule disk itself that i use as a dump for files so i can get to them from anywhere on my LAN.
Lately I started to notice EXTREMELY slow disk access, even when i am connected via ethernet (1000 base) - and equally when I am connected via wifi (n)
for example, copying over a 2Mb photo can take minutes when it should take seconds.
i've been trying to figure out whats going on here for a while and so i checked out the sizes of the backup files.. the sparseimages that time machine creates.
one of them was nearly 1TB, while another was around 500GB and the other was around 120GB
that plus my data meant there was only about 300GB free on the 2TB disk.
I have a feeling the slowness could be down to extreme fragmentation of the drive... ??
so i decided to dump the backup files and copy off my other data and do a erase of the disk and start again.. but get this.. i can't even delete the 1TB file ! I have been trying for about 3 days now and it just will not delete.. i get the Deleting msg box and it just sits there, literally ALL night...
i know it isn't just hanging on the Mac (10.6.4) because deleting the other two images also took a long time (but not this long!)
i can't just wipe the disk now because i can't get my other data off either.. I have tried copying it over the network and onto a USB disk connected directly to the Time Capsule, but 3 days later and i'm still copying files..
to put some context into this, I copied over 1.8Gb today and it took about 4 hours...
has anyone had this problem before?? what on earth is going on?? is it down to fragmentation, or something else?? the TC has been working fine up until a few weeks ago when i started to notice slow speed.
any ideas ?
thanks
Adamif anyone ever has this issue ....
it must have been EXTREME fragmentation. I bought another 2TB external disk, connected it to the TC, did a complete archive, which took around 24 hours... then i wiped the TC and put stuff back... it now works fine again... -
Slow database access across network
I have a postgresql database setup on a server machine and have written a java program in netbeans that accesses it. The problem i have is that running the jar created by netbeans from any other machine on the network has really slow database access but running the program from netbeans itself is fine. Running the jar on the server machine is also fine.
Anyoner got any idea as to why this could be?
TomI don't know if this will help, I'm just wading into writing my own java apps to hit a SQL 2K db. We purchased a SQL2k/JSP driven backend on which we extended their OM to meet our needs. It was build as an extranet product but ran very poorly across the 'Net.
The biggest annoyance was not the actual transaction time of the app but the time it took from the end user to click a button and the start of the transaction.
After much testing I determined it was the JSP.
So what we have done to alieviate the issue is to have multiple regional Tomcats that 'throw' their transactions to a central colocation where the SQL servers sit (so the tomcats do the JSP managment in a sense locally to the end user) . For big clients we actually place a linux/tomcat box at the edge of their firewall. For whatever reason, I'm far too busy to determine the how now that I get the responses I need, this has completely eradicated the annoying pause between user interaction and the actual transaction to the DB server. Extended testing showed the SQL server running in the sub half second range to process a command but the tomcat rendering could take up to 2 to 5 seconds in worst case for no discernable reason. Moving the tomcat frontends to the network segment where the clients we solved it.
Of course I'm digging into swing now too and it has some slowness that the Eclipse zealots say SWT fixes but I haven't the depth or experience to properly judge the camps arguments yet.
hth... -
Windows 2008 R2 Hyper-V has really slow VMs disk access
Wondering if anyone can help? I have noticed in a couple of Windows Server 2008 R2 Hyper-V scenarios, that the VM guests are often very slow. Disk access is especially slow.
In one situation their was only a couple of guest VMs, and they were running of mirrored IDE HDDs. Performance improved significantly when I used two mirrored SSD hdds instead.
My other main situation is where the VHDs are stored on HP Lefthand P4300, over 2-nodes with 8 SATA hdds in each, using iSCSI.
So I ran a few tests with robocopy copying 4-6GB of files (mostly large) or whole VHDs (40GB or more), using HP4300 SATA, a newer HP 4330 SAS, a THECUS NAS with SATA hdds, and an SSD in a THECUS NAS, and local SAS mirrored hdds. All using iSCSI except
the local SAS hdds.
You can see from results that Guests run considerably slower than host. Any ideas?
Sample data (although not always same background conditions of load etc):
From within Guest direct iSCSI to same (from HP 4330): 34MB/s
From other Guest using VHD (from HP4300) to direct iSCSI (from HP4330): 14MB/s
From within Guest using VHD (from HP4330) to same: 9MB/s
From within Guest using VHD (from HP4300) to VHD (from HP4330): 11MB/s
From within Guest using VHD (from HP4330) to VHD (from HP4330): 19MB/s
From within Guest using VHD (from THECUS SSD) to same VHD (from THECUS SSD): 18MB/s
From within Guest using VHD (from HP4300) to VHD (from THECUS SSD): 13MB/s
From within Host from HP4300 iSCSI to HP4330 iSCSI: 12MB/s
From within Host using VHD (from THECUS SSD) to same VHD (from THECUS SSD): 40MB/s
From within Host from HP4330 iSCSI to same HP4330 iSCSI: 232MB/s & 132MB/s
From within Host from HP4330 iSCSI to HP4300 iSCSI: 40MB/s & 57MB/s
From within Host from HP4300 iSCSI to same HP4300 iSCSI: 26MB/s & 47MB/s
From within Host from HP4300 iSCSI to Guest VHD (from THECUS SATA): 15MB/sHi aucj,
I would suggest to use host level ISCSI connection then build VM on that ISCSI disk .
please add more Vcpu for that VM then try to copy again (shutdown the other VMs ,in that online VM from one folder to another folder ).
Hp4330 ISCSI connection is 1GB , right ?
If yes , it should be with max 100M/s with the single ISCSI connection .
Best Regards
Elton Ji
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IMac Seems slow and lots of disk access.
I bought my first iMac a few months ago. However recently the iMac seems to have got really slow. I use it for Lightroom and Photoshop.
Without either of these 2 programs open for example I can just try opening entourage or any other program even Safari sometimes and the disk will just go mad and churn away and it can take ages for the program to open.
How do I find out whats causing the system to go slow? or is this just something I have to live with?I think the problem could be excessive memory usage.
Just from looking in activity monitor when I have a few progs open.
Photoshop 1.96GB
Lightroom 539MB
Safari 236MB
Also under system memory it says ;-
Free : 27MB
Wired : 762MB
Active : 2.17GB
Inactive : 1.07GB
Used : 3.98GB
Page Ins : 1.41GB
Page Outs : 1.36GB
Swap Used : 3.14GB
Does it look like my mac is paging to the disk excessively?
Message was edited by: blackforce -
USB Disk access "Extremely" Slow
I am unable to use my network disk essentially because the disk access write/read times are SO SLOW...I am better off running backups by connecting my disk directly to the compter. Does anyone else have this problem?
It took 5 Minutes to read my Music directory; connected directly via the same cable it takes seconds.
What gives?
Any help would be appreciated.I got my AE and Seagate FreeAgent Pro hard drive
yesturday and I have the exact same problem.
If I hook up the drive to the computer directly it is
very very fast.
If I hook it up to the AE it takes about 2 hours to
move a couple fils totaling 2 gigs over ETHERNET!
If I transfer the same files over the same network
between 2 computers the speed is much much faster.
Is this normal or some nasty firmware bug. It almost
feels like the AE is using USB 1.0 for some reason.
You guys are funny. How about checking out the specs of USB 2.0 and 802.11g/n?
Go here:
http://en.wikipedia.org/wiki/802.11g#802.11g
and here:
http://en.wikipedia.org/wiki/USB_2.0
Firewire vs. USB tests are here:
http://www.g4tv.com/techtvvault/features/39129/USB20_Versus_FireWirepg3.html
802.11g:
Release Date Op. Frequency Data Rate (Typ) Data Rate (Max) Range (Indoor)
June 2003 2.4 GHz 19 Mbit/s 54 Mbit/s ~35 meters
802.11n:
Release Date Op. Frequency Data Rate (Typ) Data Rate (Max) Range (Indoor)
Mid 2008 5 GHz and/or 2.4 GHz 74 Mbit/s 248 Mbit/s (2 stream) ~70 meters
Bottom line: 802.11n typical is 74Mbps, 802.11g typical is 19Mbps. USB 2.0 typical is 50Mbps.
On the average, you should expect your speed to drop by over 50% when connecting the USB drive to AESB using an 802.11g device. If your device is 802.11n, then you should have pretty much similar performance.
Now, if you increase the distance from your base station, or you put walls in between, the performance of 802.11g will go down "dramatically", all the way to 2-3Mbps, easy. Not so for 802.11n, which behaves much better at longer distances. -
I have the original AIR recently it has really slowed down. Every function usually gets the pinwheel. It is up to date and has 10g of free disk space. Any suggestions as to the cause?
Often a failed disk or power supply. See:
https://encrypted.google.com/search?q=%22time+capsule%22+%22orange+light%22&as_q dr=all&newwindow=1&num=100 -
Slow hard disk access --- still wonky
Hi,
Recently i've noticed that hard disk access has become very laggy, to the point
where it's driving me crazy.
For example, if i want to tab-complete through my directories, i have to wait a
few seconds each time. Similarly with saving files in vim, or just using
firefox, which seems to suffer frequent hangs while the disk is spinning.
I tried downgrading the kernel to 3.4.something, to no avail (it definitely used
to work just fine with the old kernels). I've also tried adding "commit=60" to
my fstab to reduce journalling access.
I ran bonnie++ and the following results came back:
Version 1.03e ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
mattdell 7672M 102163 88 106118 6 38973 3 83155 67 124734 4 207.5 0
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++
mattdell,7672M,102163,88,106118,6,38973,3,83155,67,124734,4,207.5,0,16,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++
t
which (by comparison with other results i've seen online) seem to indicate
there's nothing particularly wrong with the disk (it's a toshiba 7200rpm, i
think).
So i'm at a bit of a loss what to do next. I've attached my dmesg output. If
anyone has any suggestions, that would be awesome.
Dmesg output: http://pastebin.com/kJcbZVBT
Thanks,
Matt
Last edited by yourealwaysbe (2012-11-11 14:41:24)Arf -- i noticed firefox was still laggy last night, and on a (second or third) reboot this morning, things are back to being laggy even without having run firefox...
I'm not sure where to look, but here's the output of mount if that will be of any use:
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
sys on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
dev on /dev type devtmpfs (rw,nosuid,relatime,size=1962404k,nr_inodes=490601,mode=755)
run on /run type tmpfs (rw,nosuid,nodev,relatime,mode=755)
/dev/sda3 on / type ext4 (rw,relatime,data=ordered)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /sys/fs/cgroup type tmpfs (rw,nosuid,nodev,noexec,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct,cpu)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/net_cls type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=27,pgrp=1,timeout=300,minproto=5,maxproto=5,direct)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime)
mqueue on /dev/mqueue type mqueue (rw,relatime)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,relatime)
/dev/sda1 on /boot type ext2 (rw,relatime)
/dev/sda4 on /home type ext4 (rw,relatime,data=ordered)
All suggestions appreciated
edit: also, nothing untoward reported by top (i don't think):
top - 15:52:02 up 16 min, 0 users, load average: 0.36, 0.41, 0.30
Tasks: 104 total, 2 running, 102 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.1 us, 0.2 sy, 0.0 ni, 99.8 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem: 3930516 total, 779240 used, 3151276 free, 51616 buffers
KiB Swap: 2626620 total, 0 used, 2626620 free, 285284 cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 32552 3432 1924 S 0.0 0.1 0:00.51 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 0:00.04 ksoftirqd/0
4 root 20 0 0 0 0 S 0.0 0.0 0:00.14 kworker/0:0
5 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0H
7 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/u:0H
8 root rt 0 0 0 0 S 0.0 0.0 0:00.00 migration/0
9 root rt 0 0 0 0 S 0.0 0.0 0:00.00 watchdog/0
10 root rt 0 0 0 0 S 0.0 0.0 0:00.00 migration/1
The lag tends to occur when first tabbing into a directory. On the second time
tabbing through things seem to be fast -- i guess that's cached somewhere.
editedit: i also tried switching back to initscripts, with no improvement, so i guess systemd is off the hook for the remaining problems
Last edited by yourealwaysbe (2012-11-11 15:13:57)
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