a cache stores temporary data nearby so that it can be retrieved much more quickly than fetching it from the real backing store (disk, network), or recalculating some result all over again

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5
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1answer
1k views

Safe to remove…?

I'm trying to customize a LiveCD, but I can't manage to fit it on a normal CD. So I investigated, and came across a few files of which I don't know if it's safe to remove them. Maybe you can help me ...
3
votes
1answer
229 views

Disable memory cache - real reason

OK, before you mark my thread a duplicate I want to say, that I know this very good answer: How do I clean or disable the memory cache? But this is not case for me. I am making some performance tests ...
2
votes
1answer
154 views

Ubuntu sudden crash - Cache_Error

I was drawing svg in a text editor when, suddenly, Ubuntu 13.04 crashed on me displaying a few lines, similar to each other. Here are the two first : [30714.772014] nouveau E[ 1265] failed to ...
1
vote
1answer
152 views

Deleted /var/cache

My computer was slowing down, and I saw that deleting /var/log and /var/cache could help, so I did it... I didn't know /var/cache was so important, I tought it would just rebuild itself and deleting ...
1
vote
1answer
226 views

New XPS, Starting on Linux, Still a Windows power user, configuration question

I just bought a Dell XPS with Windows 8. Spent several months making the choice. The OS is on the 500GB HDD, and the 32GB SSD is used as cache.. seems standard. I've been wanting to get into Linux ...
1
vote
1answer
233 views

How can I stop Nautilus from caching thumbnails?

In Nautilus, I want to see thumbnails on the fly, but I don't want them to be cached. Any way to do this?
0
votes
1answer
94 views

Is it possible to limit cache memory to a process?

I am using network capture tool named dumpcap and it is consuming too much cache memory. So other processes getting no memory to run. htop command shown cache memory as 29 GB in Meters. Can ...
0
votes
1answer
234 views

There is a file in ~/.cache/deja-dup/.. with 899G size

I am running my mail server on ubuntu which has 1.2 TB in total space. Today I realized there was an issue on my mail server, it was refusing sending/receiving mails due to storage which triggers ...
0
votes
1answer
148 views

Should I put /boot on SSD or HDD

I am running Lubuntu 14.04 64bit. I am planning to implement EnhanceIO to use my new 25GB SSD drive for caching my 4TB RAID 0 array. The raid array is partitioned as: 500MB /boot, 20GB /, 200GB ...
0
votes
1answer
454 views

How to cache (more) data on SSD/RAM to avoid spin up?

I have Ubuntu server 12.04 running on a 40GB SSD with a raid 5 mounted for media files. I access the files often via samba either with a Raspberry Pi for music playback or with another PC for the ...
0
votes
1answer
2k views

Error opening cache E: read error -read (5:input/output error)

I tried to install 13.04 after downloading and burning on a boot disc, or 12.04 from a disc from a magazine over windows 7 on a netbook but got the following code an error occurred, please run ...
0
votes
1answer
882 views

how to check if cache is working

is there a way to check if disk cache is working on a regular sata disk? i see "asking for disk cache failed" error messages, but discovered my laptop has a 1gb solid state drive without a ...
2
votes
0answers
259 views

Software Centre is missing icons

I have a problem with Ubuntu Software Centre not showing icons for available apps, e.g: Is there a command to refresh the icon cache for Ubuntu Software Centre?
2
votes
0answers
179 views

huge cached memory, mostly freez system :(

I have a problem with system memory cache, i think it is bigger than normals. after 5-10 minute of usage, system become unusable and i must restart my "Asus X451-CA" laptop. this command ran upon user ...
2
votes
0answers
196 views

INCONSISTENT usb write/copy speeds; cache problem?

Foremost, slow USB write/copy speeds seem to be a hackneyed topic. But this issue is one I've not seen presented elsewhere. Thanks for showing this novice your support. I'm copying the same .iso ...
2
votes
0answers
151 views

No automatic thumbnail generation

I recently decided to do a fresh install of 13.10 and ran into a quite peculiar problem. It seems that thumbnails are not generated automatically, when I open a folder in nautilus I can only see a ...
2
votes
0answers
418 views

Error while updating via terminal from Ubuntu 12.10 to Ubuntu 13.04

I get this error multiple times (and these codes underneath still run for some reason) This likely means that your installation is broken. Try running the command: gdk-pixbuf-query-loaders > ...
2
votes
0answers
360 views

How can I make squid-deb-proxy work with proxy authentication?

I have squid-deb-proxy working fine without a problem without apt proxy authentication. However when I add a proxy file to /etc/apt/apt.conf.d and put in my proxy authentication inside this file. ...
1
vote
0answers
15 views

Is it possible to use APCu with XAMPP on Ubuntu?

I've spent two days trying to install it with my php5.5.15 on Ubuntu 12.04.4 LTS. Just curious if anyone out there ever got it to work. If so, please help.
1
vote
0answers
24 views

Preloading Files

I want to pre-load some Files / Programs into the memory, ram, cache to open / access them faster. I already tried creating a tmpfs, ramfs System https://wiki.ubuntuusers.de/RAM-Disk_erstellen (Sorry ...
1
vote
0answers
11 views

AptProxyCache Comparison

I have viewed this page about AptProxyCache but seems all are the same, is there any more differences between them such as performance, deploy difficulties and maintain costs? UPDATE: The ...
1
vote
0answers
27 views

How can I look for a smart radio player that automatically restart when the buffer gets empty?

I am tired to have the streaming broken. I tried rhythmbox, totem, audacious, even vlc where I configured 5 seconds of cache. The sound stops for a while then continue, most of times from the same ...
1
vote
0answers
124 views

Steam client GUI rendering glitch (flickering, weird overlay). Also affects Strife game

I'm running Ubuntu 14.04 on a Macbook 2,1 with 4gb RAM (about 3gb usable). All other games run fine, but the Steam client itself renders all wonky, and Strife has the same problem as Steam. Links ...
1
vote
0answers
36 views

Kdecache-user taking up lots of space

My computer has started to show signs of a bloated root partition. I checked it out using ncdu and discovered that the directory at /var/tmp/kdecache-user/ has swelled to 1.6 gigs. After doing a ls ...
1
vote
0answers
147 views

Java applications do not work in Ubuntu 14.04

I have had working Java environment til Yesterday, I cleared my all files and folders in /tmp/ then restarted my computer after that I can not get any Java applications (Chrome, Firefox, Thunderbird, ...
1
vote
0answers
377 views

Why does Firefox ignore the `304 Not Modified` status sent by the webserver?

For my site, Firefox 32.0 seems not to cache a CSS file of my Nikola 7.1.0 installation and ignores the 304 Not Modified response by the webserver. What also puzzles me, is that it sends the 2nd ...
1
vote
0answers
433 views

Can't configure NGINX to cache the images

I have been trying to cache images that are stored in nginx server, I am quite new here and to nginx I have installed it and configure it with php5-fpm, I have been reading many tutorial regarding ...
1
vote
0answers
227 views

Disable filesystem read cache

How can I disable the Linux filesystem read cache for Ubuntu 12.04? I do not want to only free the actual cache ( echo 3 > /proc/sys/vm/drop_caches ) but disable the read cache completly.
1
vote
0answers
128 views

Disk cache is sometimes dropped/erased

I have a memory/cpu monitor running, and sometimes see the graph line for “cached memory” drop, for no apparent reason. Earlier today Cache memory was at about 4.8GB but then dropped in two steps ( a ...
0
votes
0answers
7 views

Delete RStudio cache in Ubuntu after Upgrade 0.99.467

After I upgrade to the newest version, which I downloaded from the website, RStudio opens with a blank window. This happened to me when I also upgraded it on Windows but I was able to resolve by ...
0
votes
0answers
20 views

Prevent page cache above certain RAM usage level

Someone here on AskUbuntu pointed out that disk caching is harmless thing, that only makes your disc read times faster. And that it is birds singing and flowers only. I kinda have to disagree: I ...
0
votes
0answers
188 views

Squid Cache Problems

I'm new to Ubuntu (and Webmin, Squid, etc). I Installed everything and got the squid3 running, but I'm stuck in initialze cache part. When I click on it, the result shows: Error - Perl execution ...
0
votes
0answers
127 views

squid3.3 config directives help in Trusty Tahr 14.04

I have problem with my squid.conf file and I able to make some changes myself but not every change i could have done to make it work properly according my need i have a 10 to 40 client at local ...
0
votes
0answers
34 views

How to tune HDD read cache? or alternative view on WD Green problem

Setup WD Green HDDs have a feature of parking themselves after 8 sec of inactivity. The timeout can be changed. My portable PC has WD Green HDD as well as another SSD. I have Ubuntu on SSD and use HDD ...
0
votes
0answers
68 views

gem5 - Setting up x86 fs & running cache coherency code

I am new to gem5 and am trying to run the MI_example cache coherency protocol test code for x86 system in gem5. I was trying to run the ruby_fs.py script but I came to know it has be eliminated from ...
0
votes
0answers
14 views

How do I configure the Ubuntu SDK to use a proxy cache?

The Ubuntu SDK sets up emulators for me, which seems to involve a call to click chroot which then runs debootstrap. How do I pass through my proxy server settings through to debootstrap? I want to do ...
0
votes
0answers
99 views

Lenovo E540 SSD cache solution

My company gave me a Lenovo E540 that has an integrate 16 Gb SSD cache. I'm wondering how to use the cache with an existing Ubuntu 14.04 LTS installation, I found several posts explaining about ...
0
votes
0answers
32 views

Maintain a local cache for offline browsing

I am building a web kiosk that I want to be available even if internet is lost. The browser is chrome and its based on Ubuntu. Is there a way to do this with a local proxy/cache server running on ...
0
votes
0answers
87 views

My laptop very slow, Is the problem with Hard Disk or RAM ( very low Timing cached reads value)

My laptop has been running very slow, I reinstalled Ubuntu and also tried Windows but didn’t find any difference. I thought this could be a problem with my HD. I tried the below tests with hdparm ...
0
votes
0answers
27 views

APC opcache works but no statistic

I installed APC opcache for my site .I think it work well but did not see any traffic: File Cache Information Cached Files (260.9 MBytes) Hits 1 Misses Request Rate (hits, misses) 0.00 cache ...
0
votes
0answers
107 views

LDAP double root password

I've changed my LDAP root password following a few guides like this one and this one. I'm in Ubuntu 14.04, and in /etc/ldap/slapd.d/cn=config I've created a subdirectory and placed my ldif file in ...
0
votes
0answers
28 views

How to run ExpressCaché on 14.04

I've recently bought a notebook (ASUS K551LN), which comes with a 500GB HDD + 24GB SSD (SanDisk). Thing is, that SSD is supposed to be used as a caché. When I first used the computer (that is, W8), ...
0
votes
0answers
25 views

DNS Cache server on Ubuntu 12.04

I have configured a Caching and Forwarding DNS server on Ubuntu 12.04 and after whole process things were good. The server was working properly. I tested it using dig command. After rebooting the ...
0
votes
0answers
60 views

How can I get the extract here option in Nautilus not to cache the file in .cache?

I'm trying to extract a large file in Nautilus, to another partition. I don't have enough memory on my /home directory to store the files. When I click "extract here" in Nautilus, it fails because it ...
0
votes
0answers
19 views

burst internal write-back vs asynchronous internal write-back

What is the difference between burst internal write-back & asynchronous internal write-back?
0
votes
0answers
15 views

Is there a filesystem with caching and location-awareness?

Is there a way to setup a filesystem spread on 2 machines A and B in the following way? A and B are not on the same local network. Connecting to any machine shows the same files Writes to any ...
0
votes
0answers
61 views

How to find and report memory leak

When I use any graphics or diagram editing software like Gimp or Dia (and I have tried a couple more) I suddenly find the cache sucking up all my free RAM and cache which slows the system down to a ...
0
votes
0answers
22 views

Looking for a tiered cache solution for data logger

I have a Ubuntu14.04 serving as a traffic logger. Currently, the data are being written to a Ramdisk, and then later synced to a hardware storage. I'm curious if there's a software solution that will ...
0
votes
0answers
192 views

Already downloaded files are not cached by trafficserver 5.x (caching forward proxy)?

I want to setup Apache trafficserver 5.1.0 installed from source on Ubuntu 14.04 to use a large amount of disk space to preserve large download files as well as web sites (in order to get started I ...
0
votes
0answers
25 views

Can't put content in fastcgi_cache dir

I set up nginx to use the fastcgi_cache parameter. I also set fastcgi_cache_path. And everything works fine. What I tried to do is to manually add a CACHEDIR.TAG file in the fastcgi_cache_path dir in ...