An intermediate data storage area with high performance but limited capacity. The term "cache" can refer to hardware cache (on a processor) or software cache (which stores commonly used values in a computer's memory).

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2
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1answer
282 views

perf cannot get cache-misses for Linux VM on VMware ESX

I interested on measuring CPU cache-misses parameter and came across this tool called perf. I followed the wiki and able to get the cache-misses when this command is run on physical machine ...
8
votes
0answers
305 views

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

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 ...
2
votes
0answers
347 views

How to move cache folder to to the external drive in OS X 10.9?

I want to move cache folder for opera, safari and some other apps to the external drive. I heard that it is possible with symbolic links but also I heard that symbolic links don't work in OS X 10.9 ...
0
votes
1answer
375 views

Wordpress theme's index.php is not showing updates in browser's source. Godaddy hosting

I've run into an issue with a client's Wordpress site, which is hosted on godaddy (Ultimate Web Hosting Linux) I'm trying to update their theme's index.php file. Any changes that I make to that file ...
1
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0answers
47 views

What is exactly shown by “perf” as page-faults?

I want to count the number of disk accesses during a complete run of my script. My bash script runs 2 other executable files locally and 2 other executable files remotely. something like this (those ...
1
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1answer
176 views

Why doesn't Windows utilize readyboost devices?

I have a 4 GB Verbatim USB 2.0 Flash drive plugged into one of the rear USB ports on my computer. Windows detects this as a device that can be used for ReadyBoost, and I have selected that the ...
0
votes
1answer
43 views

Why do subsequent reads of a multi-gigabyte file run faster?

I have some algorithm test software running on a Windows 7 machine which, when run the first time on any given data file, runs ~3-5x slower than on subsequent runs. Our algorithm simply reads the file ...
2
votes
0answers
159 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 ...
1
vote
1answer
51 views

Does data go from primary memory to CPU register directly without going to cache memory? [closed]

Does data go from the primary memory to CPU registers directly, when the CPU fetches data from the primary memory? Or data has to go from the primary memory to the cache memory first, before going to ...
1
vote
2answers
52 views

Does browser cache affect text content also?

From my observation browsers cache css and image files. If changes were made, you need to hit "force" refresh button if you want to see updated version. However I am not able to verify if browsers ...
8
votes
1answer
1k views

Which files are cached by linux?

I understand that linux uses unused RAM to keep some files cached. But I wonder, which files it actually caches! If you take a look at free : Gesamt Belegt Frei Gemeinsam Puffer Cached Speicher: ...
0
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0answers
28 views

Is it possible to partition cache size to different cores in Linux?

I have a Ivybridge processor running Ubuntu. The processor has 4 cores sharing the same last level (L3) cache. I believe the cache is shared on demand due to Intel Smartcache technology. My question ...
-1
votes
1answer
300 views

What's the best way to use both an SSD and an HDD? [closed]

I have a Windows 7 laptop with an 128GB SSD and an 1TB HDD. I want to use both efficiently. I have 2 plans so far. Plan A) Use 50GB of SSD for OS. Use the rest of SSD as a cache space to boost an HDD ...
0
votes
1answer
798 views

Where does Mac FileZilla cache host when using SFTP?

I have used Filezilla on Mac to connect to my linux server over SSH and when prompted accepted and cached the server key signiture. Where does Mac Filezilla cache this as I want to clear it? Mac OSX ...
0
votes
2answers
53 views

Are there ways to verify the cache that a hard disk have?

Recently, I just brought a 500 GB hard disk. The sales person mention that the hard disk have a 32 MB cache. I try using the PC-Wizard (http://www.cpuid.com/softwares/pc-wizard.html) as I heard from ...
3
votes
1answer
2k views

Why do we need multiple levels of cache memory?

In general a cache memory is useful because the speed of the processor is higher than the speed of the ram (they are both increasing in speed but the difference still remains). So reducing the number ...
2
votes
2answers
184 views

Why does Spotlight omit some files in my search result?

I'm trying to use Spotlight (Mountain Lion) to do a recursive search on a bunch of subfolders. (It's actually the Firefox disk cache, and I'm pecking around for a few images, so I thought this would ...
4
votes
2answers
4k views

Too much RAM “in cache”

I am having the following problem: I am having a completely new Notebook with 8 GB RAM and Windows 8. I do not use software that requires a lot of RAM and I do not have a thousand programs running. ...
0
votes
1answer
280 views

Linux empty buffer cache command permission denied

I'm using the following commands to flush cache: # sync; echo 3 > /proc/sys/vm/drop_caches # sync; echo 2 > /proc/sys/vm/drop_caches # sync; echo 1 > /proc/sys/vm/drop_caches When I use ...
0
votes
0answers
88 views

How can I get Libre Office to stop storing my changes?

Apparently Libre Office is keeping old copies of my document in memory, because after systematically cutting a page at a time from a document (and pasting it into another one), the source document ...
1
vote
0answers
360 views

Is there a way to force caching of javascript / css with GET parameters?

There are some pages on the internet that I want to load as fast as possible, but caching of their dozens of javascript/css files is being thwarted by the presence of GET parameters on the resource ...
0
votes
0answers
392 views

squid cache is not working

I have configured squid for anonymous search and cache proxy. Initially it was working well, after two weeks it becomes slow(loading web page become slow) then again I had to looked into squid. I saw ...
2
votes
1answer
118 views

Windows Explorer doesn't show correctly the custom icon

I have an issue with a custom file extension that I've added in the registry, I've followed all steps, reviewed the .ico file path, deleted the associated registry entries and tried again, rebooting ...
1
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0answers
77 views

Reload Browser Page (And Resources) Entirely From Cache

I'm currently working remote on a specific web project. Their VPN connection is quite unreliable, so it can be difficult to refresh a page because the database lies on one of their local machines. At ...
6
votes
1answer
16k views

How to increase VLC RAM buffer for offline files?

I would like to configure VLC player to preload a significant portion (like a hundred megabytes or so) of a video file from the hard disk to RAM before playing it. Is this possible?
0
votes
1answer
352 views

What does clearing “Active Login” does in Firefox

I don't understand the use of using "Active Login" option. Can anybody help?
0
votes
0answers
80 views

Windows 7 Home Premium transparently cache Synology NAS

How can I transparently cache a non-windows NAS on my Windows 7 home premium machines? The same content tends to get retrieved over and over but I don't know which content it will be in advance. ...
3
votes
4answers
2k views

Solid State Drives (SSD) to use as cache to another Hard Drive (HD)

I recently bought a 32GB SSD drive. As everybody knows, 32GB is nothing considering modern SO's like windows 8 or even windows 7 where only file systems takes the half of the whole space (about 15GB). ...
2
votes
1answer
1k views

Why is writing speed for RAM less than reading speed? And how do caches come into the picture?

Firstly, this is true, right? I feel that reads will always be faster than writes, also this guy here does some experiments to "prove" it. He doesn't explain why, just mentions "caching issues". (and ...
0
votes
2answers
2k views

Intel RST crashing! IAStorUI unstable in win 8.1

I have a Z87E-ITX Asrock mobo. Using a new 64G Corsair SSD as cache and a new Western Digi Black Scorpion 750G 2.5" drive. Using windows 8.1. Latest software or not, I can't open Intel RST software ...
3
votes
1answer
3k views

Is there fusion drive style solution there for Linux and Windows?

Is there fusion drive style (like in iMac where the SSD acts as storage space rather than cache) solution there for Linux and Windows?
1
vote
1answer
3k views

ExpressCache not working after Windows 8 reinstall on Samsung Series 7 Gamer

I have a Samsung Series 7 Gamer laptop which came with Windows 8. After doing a reinstall of Windows, the ExpressCache software is no longer caching. Running "eccmd -info" shows me that the software ...
4
votes
0answers
228 views

why Safari always GET status 200, never 304 for my .swf file?

I serve a Flash app as a .swf file (with HTML wrapper file), and Safari always retrieves with GET status = 200, never 304. Thus, Safari never uses cache for this file and downloads it each time (it's ...
1
vote
1answer
126 views

Computers with Small Capacity SSD - For caching?

Recently, in newsletters from websites, I have been seeing computers for sale from manufacturers that include an HDD and an SSD but the SSD has a small capacity like 24 GBs. I don't know if this ...
6
votes
5answers
752 views

SSD cache to minimize HDD spin-up time?

short version first: I'm looking for Linux compatible software which is able to transparently cache HDD writes using an SSD. However, I only want to spin up the HDD once or twice a day (to write the ...
1
vote
1answer
205 views

Windows DNS cache is NOT updating at all (other computers in home have updated)

I just spun up a new VPS, set it up with a fresh and clean LAMP stack and pointed my domain to it. I waited a few hours and tried it and it was still my old website. For a laugh, I logged into my ...
0
votes
1answer
1k views

How to calculate the size of the page table from this data?

A computer uses 46–bit virtual address, 32–bit physical address, and a three–level page table organization. The page table base register stores the base address of the first–level table, which ...
0
votes
1answer
94 views

Why are thumbs.db files stored within the directory they refer to?

I would have imagined that - being nothing more than a cache of thumbnails - thumbs.db files would have been stored in some dedicated cache area of the Windows filesystem: perhaps Explorer's app cache ...
2
votes
1answer
700 views

Make ReadyBoost cache more aggressively

I have always had a 32GB high-speed Transcend SD card in my laptop for ReadyBoost, but it isn't very helpful because Windows isn't making heavy use of it: the cache size is usually 2 GB or less and ...
2
votes
1answer
773 views

Clear cache of virtual machine

I already posted this on StackOverflow, but it was flagged as Off-Topic. Maybe you guys are able to help me. I'm currently doing some database benchmarking on a virtual machine running Ubuntu 12.04. ...
7
votes
1answer
9k views

Why is SRAM faster than DRAM?

In modern multi-core processors, the processor caches (L1,L2 and L3) are made up of SRAM with decreasing speeds(L2 caches are higher speed SRAM than L3 caches which is a cost trade-off). The main ...
3
votes
2answers
534 views

Do USB memory sticks have controller and disk-cache on-board?

I'm well aware that the spinning-platter type of hard-disks have an on-board controller and an onboard disk-cache. Now, does the 'disk'-cache also exist on a (4- or 8-GB) USB stick? Incidentally, ...
2
votes
0answers
41 views

Can the contents of caches using non-volatile storage (i.e. SSDs) get used after a machine reboots?

When caching with a non-volatile medium does data that was used the last time the machine was powered on get used again? For example would a SSD configured using SRT still hold the contents from the ...
7
votes
1answer
374 views

Make Firefox cache a webpage so that I can view it without a reload after a restart

I want Firefox to be able to cache webpages such that I can read the pages later after a restart. I've tried setting the cache size to 350MB but it still doesn't work as intended. Opera seems to do it ...
0
votes
1answer
796 views

Virtual memory (caching) on Windows 8

I have read a bit about the issue, and I understood that the OS constantly pushes memory to the disk, so later, when another application needs a lot of RAM, it allocates that memory to it and "moves" ...
2
votes
2answers
1k views

“This website is asking to store data on your computer for offline use”

Whenever I visit some websites using Firefox, I get the dialog below asking me to "store data on your computer for offline use". It is displayed if I am using Firefox but not if I am using Chrome. ...
1
vote
1answer
165 views

Recovering Firefox cache?

How can I recover a page that has expired from the Firefox cache? Long story short, I have a private server at localhost that I run. I had two pages (important essays I wrote) that I basically ...
0
votes
0answers
427 views

ECC on harddisks

I have completely re-written my post here as I noticed I was a bit unclear before. In an older post the user sawdust explained very well that there is an SRAM buffer on the HDD controller which uses ...
1
vote
1answer
968 views

Accelerate tab missing after reinstall

I had SSD caching enabled and working without problems, but I had to reinstall my Windows 8 and now can't reenable it, because the tab is missing. I have read many similar threads and tried all ...
1
vote
1answer
2k views

which of the following memory has the shortest access time?

which of the following memory has the shortest access time? Virtual memory Cache memory External memory Register When I try to select the correct answer, I feel like it must be cache memory ...