For questions concerning computer, or computer-related, performance. Please include metrics in your questions.

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4
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0answers
130 views

How do I evaluate an SSD caching solution for home desktop use?

I've got a 30GB SSD that I would love to start using as a cache for my larger HDDs. I primarily want to improve apparent performance for general desktop use. I do the occasional massive DB migration ...
3
votes
0answers
88 views

How can I get a closer to real time performance on a virtual machine in VMWare Workstation?

I am running an Ubuntu Server 13.04 installation in a virtual machine on my computer, the one thing that pushed me into it's creation was the need to host a VPN and allow more than one user on it, and ...
3
votes
0answers
2k views

High CPU usage by dwm.exe when nothing is happening

Setup: Windows 7 Ultimate, running in a VMware box inside Windows 8, VMware Tools installed; VMware Workstation is the only application launched in win8). Aero is on. Starting a few months ago, on ...
2
votes
0answers
18 views

Why do I get better performance on VMWare when I enable all cpus along with adding cpulimit?

I'm curious but at the same time also would like to share my findings of the increased gaming performance in VMWare by enabling all virtual cpus and limiting the VMWare process with cpulimit ...
2
votes
0answers
147 views

HDD very slow performance after full copy from SSD

The PC: Core i7-4770, 16GB RAM. There are 120GB SSD and 1TB HDD (new without any bads). On the SSD I had Windows 8.1 installed with all other stuff. Someday all programs exceeded 120GB limit and I ...
2
votes
0answers
51 views

Show dial up connection status in Task Manager

In Windows 8.1, Task Manager shows Wi-Fi, Disk, CPU usage graph in Performance tab. But, it doesn't shows usage of a dial up internet connection. How can I add dial up stats in task manager. Here are ...
2
votes
0answers
128 views

USB Keyboard and Mouse slow to activate using docking station for Lenovo T430

I just recently upgraded to a T430. Happy with the laptop but one thing I find annoying is that when I use it through the docking station - it takes several minutes ie 3-5 for the USB keyboard and ...
2
votes
0answers
79 views

What desktop computer hardware specifications are most important for database heavy applications?

I am purchasing a new personal desktop computer with the hope of improving performance for database-heavy applications (mostly data mining). I will want versatile hardware for all sorts of future ...
2
votes
0answers
57 views

Two-fingered scrolling is slow in Windows 8 modern UI aka Metro

I own a Packard-Bell te69hw. It has an ELAN tech touchpad built-in. The issue is that the scrolling is really slow in Metro. It works perfectly fine in desktop mode. The problem was the since day one. ...
2
votes
0answers
174 views

Super slow SDD write speeds with RAID 1

I have a very new computer system, configured in RAID 1, but was surprised that the write speeds were extremely slow! Here is a snapshot of my computer setup: Motherboard: Asus Z9PE-D8 WS ...
2
votes
0answers
119 views

How much performance reduction is ok for a linux router?

I am having thew following (simplified) setup: I have a private Subnet where my PC is located. The subnet goes over a virtualized server into the internet. The server uses internally two subnets: One ...
2
votes
0answers
274 views

“appleeventsd” slows down Word + EndNote

I'm writing my doctoral thesis on a Macbook pro using MS Word 2011 and Endnote X6 (Mac Word and Endnote on the newest version). Word responses really slowly to any input like typing or scrolling, with ...
2
votes
0answers
97 views

Low bandwidth only on Windows XP

Hi I own really old PC and I've 10Mbps/1Mbps Plan. Internet is distibuted with router over whole house. The old PC uses 802.11b (up to 11Mbit/s download) Wifi card and has Windows XP+SP3 installed. ...
2
votes
0answers
353 views

nfsstat authrefrsh almost equal to calls

I mounted a dir from my server through nfs (v3) on my LAN and if I run nfsstat I get # nfsstat -rc Client rpc stats: calls retrans authrefrsh 2527772 0 2527782 Is this ...
2
votes
0answers
707 views

When tab groups are loaded, Firefox becomes unresponsible for minutes (Unresponsive script)

I have several tab groups (~ 20) in Firefox. I can start the browser without any problems. However, as soon as I … click at the "Group tabs" icon in the toolbar, or right-click on a tab and hover ...
2
votes
0answers
217 views

Improving Chrome performance on OSX

There are a number of sites that do not display properly on Safari and I need to switch to Chrome. Although when the content of the sites requires flash player, Chrome will consume a significant ...
2
votes
0answers
361 views

Microsoft Security Essentials: keep download scans but disable local activity scans

In Microsoft Security Essentials, I used to disable "Monitor file and program activity on your computer" but enable "Scan all downloads." Now, Microsoft Security Essentials (MSSE) 4.0 removed the ...
2
votes
0answers
104 views

Laptop is super slow on network

So on our network we have a bunch of wireless macs and window Operating laptops, we have a network setup with 802.11g,b,n. All the laptops seem fine except one which is only getting speeds of 54Mb. I ...
2
votes
0answers
252 views

Copying from WHS 2011 backup very slow

I'm setting up a new computer to replace one of my old ones, and part of doing so is extracting my Home folder from a backup I made just before wiping the old one. However, copying from the mounted ...
2
votes
0answers
91 views

Have anybody tested R multicore packages on 10-core Xeon how do they scale in comparison with case of 4 core machine?

Have anybody tested R multicore packages (for example : parallel, multicore, snowfall, foreach) on 10-core Xeon ? How do they scale in comparison with case of 4 core machine ? What algorith have you ...
2
votes
0answers
39 views

Are there guidelines for the performance implications of adding multiple usb/firewire drives to a Mac?

I have noticed that I get a significant performance drop on a Mac Pro with more than 5 daisy chained firewire 800 drives. Task switching grinds to a halt, and the machine often beachballs between ...
1
vote
0answers
18 views

Linux: What is causing high interrupt activity for IRQ 23 (ehci_hcd)?

I run gkrellm to monitor my workstation. Total CPU usage usually runs 0-1% at idle; when there is activity, it's usually cyan-colored (user space). It was running clean this morning. A couple hours ...
1
vote
0answers
86 views

Slow write speed on external SSD

I am experiencing slow write speeds using an external Inatek USB 3.0 2.5" External Enclosure (UASP supported) with a Samsung 840 120GB drive. I just started using this setup on a late 2013 iMac as an ...
1
vote
0answers
536 views

Very slow volume expand on Synology ds2413+

I've posted this elsewhere on the internet aswell, and will obviously reply in both places if a proper solution is found. I am attempting to expand SHR volumne (2x4TB, 1x2TB) with additional 4TB ...
1
vote
0answers
36 views

Windows boot performance - 52 seconds to initialize drives?

I had an issue with my primary SSD and I replaced it with another from a different brand, and at the same time I reordered my other 2 mechanical (C=ssd, D & E=mechanical). Now, when I load ...
1
vote
0answers
38 views

some programs running much slower after mscvrt runtime redistributable delete/reinstall

UPDATE: It appears that there may have been an unfortunate coincidence. It seems that right around the time I was doing these builds and deletions of redistributables, my laptop power adapter was ...
1
vote
0answers
90 views

Java (SE) program execution is too slow on Debian Wheezy… do I need to “tune” the JVM?

SuperUsers. I wrote a desktop program to execute a simulation process (not worth copying the code here... it's quite a long program). If I run it on a MacBook Pro (Intel Core i7 2.2 GHz, 4GB RAM), it ...
1
vote
0answers
179 views

LSI SAS 2308 MPT2SAS Linux Read/Write performance

LSI SAS 2308-8e (6Gb/s per Lane) PCIe 3.0 card. Average Read/Write Raw performance for 4 SSDs is very low around 430 MB/s (Expected 2 GB/s).I am having Intel Core i3 with quad cores and 4 GB RAM. ...
1
vote
0answers
124 views

Windows 7 hangs upon input events and opening sockets

I'm using a work laptop running Windows 7 64-bit Professional. The laptop is a Dell Studio XPS and has the following specs: Intel Core i5 M460 Quad-core 2.53GHz 6GB RAM ATI Mobility Radeon HD4670 ...
1
vote
0answers
335 views

Improving/Resolving keyboard input lag with Visual Studio 2013

I'm having a slight delay (50-200 ms estimated) with keyboard input (code editing) from within Visual Studio 2013. The problem does not occur with Visual Studio 2010. When typing, there is a slight ...
1
vote
0answers
20 views

Utility service that logs total network usage

I would like to know the total bandwidth our internet provider essentially provides to the many competing devices in our home. Is there a simple windows service that uses a wireshark like trick to log ...
1
vote
0answers
39 views

Do TWAIN drivers benefit from multi-core CPUs?

Advanced TWAIN drivers of document scanners contain many image enhancement features such as descreen, color drop-out, despeckle, deskew, prevent see-through, etc. Some of these features are quite CPU ...
1
vote
0answers
32 views

Laptop plays music choppy after a few minutes of idling

I noticed that when I'm doing my homework and let my laptop play music, the music becomes choppy after 10-15 minutes. Like my laptop's freezing or something, but as soon as I do something (bring a ...
1
vote
0answers
48 views

Can you explain me VMWare Performance Counters in Windows?

I am having a guest Windows Server 2008 R2, i.e. VMWare virtual machine Can you explain me VM counters vs. non-VM-ones, in the case of "% Processor Time" (under "VM Processor" section) vs. "% ...
1
vote
0answers
37 views

One Windows 7 pc slows down when another pc is turned on

I have a very strange problem that is affecting only 1 computer of the network (a network composed of 6pcs and two network printers): If I turn on pc number ONE first, and pc number TWO after that, ...
1
vote
0answers
18 views

How to keep apache running on Windows machine?

I am forced to use Apache on a Windows machine (server 2008) - basically it was installed in the XAMPP package. The problem is that it frequently hangs up. The "send error" notification appears - and ...
1
vote
0answers
61 views

Does shrinking a partition to its minimum size then expanding it increase performance?

As a VPS administrator, I've shrunken and cloned partitions (or disk images) to perform backups. The shrinking of the partition adds a few extra minutes of downtime, but reduces the amount of total ...
1
vote
0answers
1k views

Windows 8.1 Process Migration Limits CPU frequency scaling

Summary: I've noticed that with Windows 8.1 on my laptop, running a single CPU intensive program does not cause the CPU frequency to scale to its maximum value. I suspect that this is because of ...
1
vote
0answers
204 views

Too much disk activity READING event logs

On Win 7 SP1 x64, I notice that sometimes the disk gets so busy that Windows becomes unresponsive for minutes at a time. I referenced this problem on SU in the past once. I've since replaced the ...
1
vote
0answers
516 views

Why would dropbox cause an increase in Latency

I am trying to figure out why Dropbox seems to be completely disturbing my internet connection and if others may be having the same problem. When Dropbox is idle, I ran a speed test. I get a ping to ...
1
vote
0answers
366 views

Very slow performance

I'm using Windows 8.1 RTM with following PC: Foxconn h61mxp mb 500gb Seagate ST500DM002 HDD The problem is, I have nearly always 100% disk load Here are running applications on tray: And ...
1
vote
0answers
167 views

Mac has become insanely slow : Processes SystemUIServer, UserEventAgent and loginwindow using a lot of memory

I have been using my Mac for for many months without any problem. But recently all of a sudden the Mac became insanely slow. I opened Activity Manager to see what was happening. For three processes ...
1
vote
0answers
98 views

Windows unresponsive, CPU utilization uninformative

In many situations my Windows 7 box becomes unresponsive, but the Task Manager shows 0 CPU utilization for all processes. Obviously it is the kernel/Windows itself that is sucking all the cycles and ...
1
vote
0answers
283 views

CPU performance monitoring and diagnosis Maximum Frequency drop

Question: what might be the reason why the maximum frequency goes down to 49%, while this is not sufficient to run existing processes? (please note if I am wrong in interpreting that CPU usage is ...
1
vote
0answers
217 views

Does this HDTune result indicate a bad/damaged HDD?

Recently, my laptop started slowing down a lot more than usual, where it took more than 5 minutes to load Visual Studio (Before, it only took at max 30 seconds). so I ran an HDTune Benchmark: This ...
1
vote
0answers
168 views

Problems with buffered disk read performance

I have two identical linux boxes (running ubuntu 13.4) with identical hardware including a WDC WD20EARS hard disk. I noticed that my main system got unsually slow and performed a number of HD tests. ...
1
vote
0answers
256 views

Windows 8 Start Screen Lagging

For some reason, when explorer.exe gets restarted on my Windows 8 PC, the start screen is laggy. What I mean by laggy is that when I scroll in the start screen, it takes a bit to show the rest of the ...
1
vote
0answers
229 views

How to use tunefs

Introduction: I'm planning a performance-oriented clean install of OS X (10.6) on my Mac and I've decided (among other things) to split the hard drive into multiple partitions. Two of them will be ...
1
vote
0answers
27 views

Hot File Clustering with multiple partitions

I'm planning a performance-oriented clean install of OS X 10.6 and I was wondering if the hot file clustering feature will exists only on the boot partition or if there will be one for each partition ...
1
vote
0answers
249 views

Suggestions for finding performance bottleneck on LAMP server

I know this question has been asked a thousand times and I've read through a bunch of the answers, but haven't found one that really helped me. I've used top and I'm not swapping at all, I've got ...