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

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26 views

How to throttle performance of a VHD (Virtual Hard Disk )

I'd like to be able to throttle the performance of Reads/Writes on some of my disks. While I know it might be pretty difficult to control that on actual Physical disks, is there any tool which can ...
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2answers
73 views

Is disk read/write speed affected by processor architecture? [closed]

I am not sure what effect if any a 32 bit vs 64 bit architecture processor has on disk read/write speed. I believe that a 64 bit processor can address more main memory than 32 bit processor without ...
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2answers
264 views

Optimal RAM configuration: one large DIMM vs multiple smaller DIMMS?

I have always been told there were performance advantages in using multiple smaller DIMMS vs a single larger DIMM (as the combined bandwidth of all the motherboard's RAM slots would be used). My boss ...
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2answers
52 views

Improve SSD performance on Windows 7 laptop

I got Asus k40in and I've just replaced it's HDD with new 120gb SSD (Kingston v300) to give it a new life as office machine; winsat disk shows ~225 MB/s sequential read and ~195 MB/s sequential write. ...
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4answers
65 views

Is too big cache a bad idea? [duplicate]

I am going to pack a new computer for myself and I thought about Xeon series as main processor. Xeons tend to have very big caches even up to 32MB. And here is a question: Is it a big advantage to ...
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0answers
17 views

Single user website — performance tuning

I'm a university researcher and I have a private wiki which I use to write down notes. It's on a very resource constrained VM with 512MB of memory running MediaWiki. Since there's only really one ...
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0answers
63 views

Laptop unusually slow after being accidentally dropped. Hard drive was replaced but still slow

My laptop—a Dell 1747 i7 laptop—fell from my desk to the concrete floor of my basement office when my son tripped on its cord. As would expect, that was it for the hard disk. Luckily, though, the ...
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1answer
111 views

ATTO benchmark read speed slow below 4MB transfer size on 2-way mirror

I've set up two Toshiba DT01ACA300 HDDs in Windows 8.1 Storage Spaces as a 2-way mirror formatted as a NTFS volume. Benchmarking with ATTO shows this (volume is only a quarter full of data) Click ...
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1answer
181 views

High disk usage with windows 8.1

I have a problem that whenever I start playing Call of Duty Advanced Warfare on my PC, it gets really laggy. When I open the task manager, I find that the disk usage is at a 100%, mainly used by the ...
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2answers
68 views

How can I cut off my slow Windows local network without touching the Internet connection? [closed]

I want to cut off my Microsoft local network connection, but not the Internet (http, https) one. Any solution - like the Firewall - is good. By saying this, I suppose there is something (like a port ...
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1answer
55 views

Types of low perfomance in videogames

I've experienced two types of bad perfomance in videogames: 1. The basic one, when you have a low frame rate during the game. 2. When the game is fluid in some intervals of time, but it freezes a ...
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2answers
61 views

Disable OSX 10.10 dashboard

I noticed that my dashboard was using 25% of my cpu on osx 10.10 after I upgraded... now I want to disable the thing altogether because I never use it and it is doing two things that I do not like, ...
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1answer
30 views

Does Processes on Host Machine Affect Virtual Machine?

I use Windows 8.1 as host and Ubuntu 14.04 in VMWare. I am going to run computational simulations in Java. I have two questions: 1. If I run simulations on VM and do other works on host machine, ...
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1answer
136 views

Impact on SSD when encrypted with BitLocker [duplicate]

I am running Windows 8.1 Pro on a Samsung 830 SSD. I do not have a TPM module so I've made the necessary configuration changes to permit BitLocker encryption of my system drive without a TPM module. ...
1
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3answers
223 views

Performance difference between SD and MicroSD cards?

If you compare a MicroSD card with an advertised speed of 48 MB/S to a full size SD card with an advertised speed of 48 MB/S (from the same manufacturer), should their performances be identical? Or ...
5
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2answers
239 views

Recent RAM Issue with Windows 7 - Memory Slowly Fills Up

Before I say anything at all, I want you all to know where I've been with this issue: I have run multiple AV scans, including: Malwarebytes, Sophos Virus Removal, ADWCleaner, ESET Smart Security 4 ...
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1answer
41 views

What are the performance differences between SSD caching and native SSD usage?

I am looking at making some changes to my computer. I currently have a machine running on the X79 chipset and I am using a dedicated RAID controller. The controller is an LSI MegaRAID 9260-8i SAS / ...
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0answers
87 views

Causes of slow network connection between two Windows 7 computers on LAN but either Win7 and a Linux computer are not slow

I am experiencing slow (approx. 1 MB/s) transfer speeds on my home wireless network between two Windows 7 computers. Speeds improve when switching to Ethernet on both. This speed is being observed ...
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0answers
37 views

Really slow connection between wireless routers - wireless interference or something else?

I've got a bit of an issue with my home network. Three TP-Link WR1043ND V2 are used in the setup and the idea is to get a wireless signal to all three floors of the building. All three routers are ...
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0answers
48 views

Is there a way to make windows faster by making it use more RAM?

I use windows 8.1 OS. The bottleneck for my PC is my AMD A4 Processor(1.5Ghz x 4). However I also have 16 GB RAM. It works out fine for me because I generally tend to use a lot of RAM than CPU. ...
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3answers
391 views

Why is there the Installed Memory: 4.00 GB & Available Memory ONLY: 536 MB - 2.20 GB

This is a desktop computer, the problem is the difference between the installed memory versus the available memory. I search everywhere, for a fix to this problem. Installed Physical Memory (RAM): ...
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0answers
22 views

mac book pro slowing down with age [duplicate]

I have a mac book pro that's about 4 years old. It's been slowing down. I tried to defrag the hard drive, but that didn't really help. I am using about 70% of the hard drive, but I haven't had a lot ...
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2answers
46 views

How to apply regex to large text file?

I have large text files (some mega) example and I would like to know how if there is a more efficient way to apply regex than to PyCharm or SublimText 2 on Mac OSX. Thanks. Comment: I want to ...
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0answers
47 views

Thousands of page faults per second while page file lies empty

So, in my office system, things are going crazy. Every thing was extremely slow, so much so that switching tabs on chrome took 10 seconds. So, I checked the performance monitor for the issues. ...
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0answers
12 views

Options for daily non-RAID data mirroring?

I'm considering setting up a storage box with an SSD and I want resilience in the case of hardware failure of that SSD. (I expect the box to run Ubuntu 14.04.) I have three reasons to consider ...
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1answer
60 views

windows 8.1 extremely long login

Hello I have just bought new computer. Asus g550jk. It came without Os, so i have installed win8.1 . It worked fine at the start but after few drivers and windows updates it developed very long login ...
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4answers
192 views

Why is my Mac slow?

I've started seeing the beach ball cursor on my Mac a lot lately, and I haven't been able to track down the cause. It happens even after restarting, with only a few applications running (basic stuff ...
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1answer
82 views

Does Intel Smart Response cache drive size matter?

I have a Lenovo Y400 laptop, that came with a 16gb Intel Smart Response cache drive. I also have an unused 64gb ssd drive lying around. I was wondering whether replacing the 16gb cache drive with the ...
0
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1answer
16 views

Network resources being called when no connections are configured

Some users were reporting awful performance in Excel 2010 when doing simple things like clicking a cell or changing sheets for many workbooks they use. I made sure there were no dead connections ...
0
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1answer
25 views

Why is oracle instant client so slow on OSX?

I have both a PC and Mac environment setup to connect to the same Oracle server. Both are using Oracle instant client 11.2.0.4 and are on the same network. Both machines are similarly configured ...
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2answers
43 views

Is it normal for uploads on ADSL to make the connection unusable (> 4000ms latency)?

I have an ongoing saga with my internet connection; where the latency periodically goes through the roof. In most cases, this seems to coincide with something uploading data. I'm not having a lot of ...
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3answers
144 views

Would it make sense to install Windows 8.1 on the HDD instead of the SSD?

Just about to setup a new laptop with a 128GB SSD and 1TB 7200RPM HDD. I'm thinking that most of the 30+ GB of Windows files are probably not accessed on a regular basis, so they don't need to take ...
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0answers
53 views

Difference in performance between ARM and “traditional” CPU on Raspberry PI example

I'm not sure if my question fits here, but I will give it a try since it does not seem to fit any other StackExcnhange. New day ARM processors are slower (if you look at MHz - 500MHz in RPi case). ...
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0answers
106 views

Windows 7 lag, google didn't provide any clues

I had Windows 7 running on my laptop without problems, then I bought a 240GB SSD and installed Windows 8 on it. I didn't like Windows 8 and it had compatibility problems with my motherboard (lower ...
2
votes
1answer
536 views

How can mainboards provide more PCIe lanes than the chipset?

I'm currently choosing parts for a new computer, with my main focus on high PCI Express speed and a large number of slots. In this iteration, I will probably choose a board with an Intel Z97 chipset. ...
2
votes
1answer
167 views

ls -l but not ls --color=never slow on nfs-mounted directory, if simulatenously writing to that directory

when I dump data into an NFS-mounted directory, reading files modes (e.g. ls -l) is several orders of magnitude slower than a plain file listing (e.g. ls --color=never). I would like to understand ...
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1answer
22 views

How do I find out what processes are accessing the SPECIFIC hard disk in Linux?

I have several hard drives and power save does not work for them. I would like to know, which process are probably accessing them. But I need to know this BY DRIVE, i.e. the thing what apparently ...
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4answers
206 views

Dell Latitude E6420 8GB memory showing as 3GB Windows 7 [duplicate]

This is what RAMMON is showing; Ram Type DDR3 Not Populated Maximum Clock Speed (MHz) 666.67 (JEDEC) Maximum Transfer Speed (MHz) DDR3-1333 Maximum Bandwidth (MB/s) PC3-42600 Memory ...
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2answers
65 views

CPU higher than maximum

Hi so I bought a new laptop with an Intel i7-4510U processor. Its max cpu it says is 2.0ghz(Which I thought was low). How is it running at +2.8ghz. Is this affecting its performance? Or is there some ...
0
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1answer
36 views

Can My ISP's Assigning me a New IP Explain Poor Performance on my Home Network?

I have observed numerous times that poor performance on my home network, which is infrequent and characterized by slow transfer rates (especially over wireless), is resolved by rebooting the router. ...
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0answers
84 views

How to achieve best browsing performance using Polipo?

I'm using Polipo to browse the web, I've set up the config file as follow (consider that I have 4 Gb of DDR3 ram, and my computer is quite fast): I've noticed that seems better if I disable the ...
2
votes
2answers
96 views

Could slowness/sluggishness at startup on a new MacBook be a hardware issue?

Symptom 1: After selecting region, the OS setup UI froze, I’ve researched, went back (took some time for UI to respond, like minutes), and continued setup, no slowness after that point (might have ...
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0answers
28 views

New Windows 7 workstation shows KSOD and extreme sluggishness; what gives?

I have been setting up a Windows 7 workstation: 4 GB RAM 1 TB SATA hard disk Core2 Duo CPU Intel GPU of quite recent make Windows 7 SP1 64-bit About 1/3 of the times it boots up, it never reaches ...
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0answers
33 views

100s of Reads vs 100s of Writes

Consider a pretty fast Hard Disk. I know many writes to a single disk will always be slower than many reads. For instance time taken to complete 100 write operations is much longer than time to ...
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1answer
224 views

Ubuntu Server 14.04 in VirtualBox: disk performance drops with more than 1 CPU

I'm running VirtualBox 4.3.18 on OSX 10.9.5 . I install Ubuntu Server 14.04 64bit and performed this basic disk write test: dd if=/dev/zero of=bigfile bs=1024 count=5000000 Setup of host (MacBook ...
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0answers
69 views

How to increase I/O priority of a zpool scrub (at runtime/without reboot)?

The speed of the scrub is not exceeding 5 MB/s for the first half hour (according to zpool status 2. The pool reaches 140 MB/s maximal and 50 MB/s for > 30 minutes. Watching iotop I see that txg_sync ...
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1answer
96 views

Memory cards for tablets [closed]

I want to learn more about the terminology used in association with high-quality memory cards. For example, Class 10 is the fastest class available. Above this, UHS-1 makes it even faster. In ...
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4answers
496 views

How come my 7200 rpm external HD is slower than my 5400 rpm portable HD?

I have been reading and writing the same files on two external hard drives connected to the same computer, a 2011 MacBook Pro. I was expecting the 7200-rpm EHD to be faster than my 5400-rpm EHD, but ...
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2answers
237 views

Assuming a PC has plenty of RAM, will an ssd make web browsing significantly faster? [closed]

Assuming a PC has plenty of RAM (as many cheap laptops with HDDs do), will an SSD make web browsing significantly faster? Is an SSD a worthwhile investment for someone who's in google docs and gmail ...
0
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1answer
106 views

How do I optimize Windows disk I/O for high-latency throughput?

Let's say there are 25 processes each which want to read and index a large (say, 1GB) file. The hard drive may be capable of ~100MB/sec throughput, but the head movement and rotational latency ...