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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13 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 didnt find any difference. I thought this could be a problem with my HD . tried the below tests with hdparm sudo ...
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0answers
7 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 ...
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0answers
19 views

Long delay for Ubuntu 14.04 to show directory contents

I have been unpleasantly surprised by how long it takes Ubuntu to show any directory contents, regardless of the number of items there. for example, if I have multiple sub-directories in Documents, ...
0
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0answers
24 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 ...
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1answer
20 views

Location or arp cache

I can see my arp cache if I enter arp into the terminal. I want to know the file location of the arp cache in Ubuntu.
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1answer
22 views

Simple html cache for Ubuntu Server 14.10

Which is the best system for html cache in Ubuntu Server? I have some sites in hosting on my dedicated server. I installed and set APC, I enable the cache of Apache. The sites are all made in ...
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0answers
19 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), ...
1
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0answers
88 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, ...
0
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1answer
27 views

Installing files from archive cache

How to make a backup of apt archive cache? If I make a backup of the archive cache can I install the applications in the current system to any system, which is running the same OS, using the archive ...
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0answers
21 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 ...
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0answers
25 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 ...
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0answers
9 views

burst internal write-back vs asynchronous internal write-back

What is the difference between burst internal write-back & asynchronous internal write-back?
1
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1answer
110 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 ...
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0answers
9 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
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0answers
51 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
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0answers
15 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
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0answers
128 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 ...
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0answers
237 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 ...
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0answers
22 views

Difference between System monitor and free -h [duplicate]

I have a Lenovo T430 laptop with 3.7GB of RAM. Since I started using this machine I observe the following strange behavior. If I do a lot of things, say have rails server running, a few nodejs ...
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0answers
19 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 ...
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0answers
21 views

How often is the thumbnail cache cleared? [duplicate]

I'm not sure which application is the culprit (Nautilus, with the help of another library, I would assume), but if you take a look at ~/.cache/thumbnails you will notice that Ubuntu stores the ...
1
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1answer
39 views

Does Ubuntu delete cache-thumbnails after leaving the guest mode?

When i leave the guestmode, are there still some cache files?
0
votes
1answer
167 views

How to copy all “apt-get update” cache

How can I copy all apt-get update cache to another computer, so that it doesn't need be updated again and again after new installation?
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0answers
30 views

Clear history of words typed in the dialog run (ALT + F2)? [duplicate]

wanted to erase all the words that remain as an option, every time tightening ALT + F2
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votes
1answer
147 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 ...
2
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0answers
113 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 ...
7
votes
2answers
213 views

Does Ubuntu store data of external media/drives?

I keep confidential data (docs, spreadsheets, images, etc) on USB sticks or discs. I plug/insert them to access the data when I need, and put them back in a drawer when I'm done. Does Ubuntu store ...
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0answers
26 views

Problem installing packages - Java [duplicate]

I'm having a problem installing Java. It keeps telling me this when it starts to remove outdated cached downloads: Removing outdated cached downloads... sha256sum mismatch jdk-8u5-linux-x64.tar.gz ...
5
votes
1answer
6k views

How do I correctly enable PHP 5.5's OPCache in Ubuntu 14.04?

I'm setting up a local server to test configurations; it's a clean 14.04 LAMP server, as selected during OS install. If I understand correctly, OPCache comes with PHP 5.5 (php -v confirms this) but ...
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0answers
388 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 ...
3
votes
3answers
2k views

Why does my system use so much cache?

Previously, on my desktop computer running Ubuntu 14.04, I had 4GB RAM, which I thought should be plenty. However, after being on for a while, my computer would seem to get slow. I have a system ...
1
vote
1answer
40 views

More about JuJu cache

I would like to know more about JuJu cache. After I start a charm and JuJu provisions a machine for the first time, the charm will be downloaded and all dependencies installed (apt-get, etc). This ...
1
vote
1answer
637 views

Why won't Ubuntu tweak delete my Thumbnail Cache?

In Ubuntu tweak 0.8.7 which is installed in my Ubuntu 14.04 LTS running unity I could not delete a particular file called 'fail' in the thumbnail cache. I am actually trying to remove that file with ...
0
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2answers
34 views

How to update a machine from packages downloaded on a different but similarly configured machine?

I have two laptops with similar configuration. I have updated one and would like to use the cached packages of this to update the other one. I cannot find a way. I did Ctrl+A then Enter but machine ...
0
votes
1answer
130 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 ...
2
votes
1answer
684 views

Clear .cache tracker directory in ubuntu?

I created a partition for Ubuntu and I just ran out of space a couple days ago. I used the Disk Usage Analyzer and I realized that for some reason the directory /home/.cache uses up a lot of disk ...
1
vote
1answer
131 views

Know programs in cache

I have this situation with RAM and SWAP at the moment: $ free -h total used free shared buffers cached Mem: 7,7G 7,5G 159M 100M ...
1
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0answers
100 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.
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0answers
85 views

Error when starting ubuntu laptop.

My laptop is a modified Toshiba Satellite L355. It has a Intel core 2 duo 1.83ghz Cpu and 3gb ddr2 Ram. I'm using Saucy Salamander 13.10 I installed Ubuntu Studio a while back when my friend gave it ...
0
votes
0answers
13 views

update package error [duplicate]

E:Encountered a section with no Package: header, E:Problem with MergeList /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_precise_multiverse_i18n_Translation-en, E:The package lists or status ...
0
votes
0answers
7 views

Distributed share storage across WAN

I'd like to build something which looks like "BranchCache" in Windows Server with Ubuntu. That is : - publish/share a folder on an Ubuntu Server in site A - have a user located in site B access the ...
0
votes
1answer
121 views

my cache fills up but never goes down

I know Ubuntu manages memory autocratically, it stores cache on ram for quick program access, but every time I fill up the cache, it stays filled up, and Ubuntu it self cant delete the cache, if I ...
0
votes
0answers
26 views

Putting Firefox in a truecrypt disk

Hello I am new to Ubuntu, my priority is to move the cache to a mounted truecrypt disk, my biggest problem is that I am confused about "directories", because in Windows it was easy to just put the ...
0
votes
0answers
69 views

Ubuntu NAS, cache files to ram for enhanced transfers?

I have a little dual core celeron computer that I will be using as a NAS. I have 8 GB of ram, and I was wondering if there was anyway to leverage that ram to increase file transfer speeds, especially ...
3
votes
1answer
149 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 ...
0
votes
2answers
85 views

How to remove packages from the apt cache that are not currently installed?

I want to organise my apt cache folder so I want to remove packages that are NOT currently installed and keep packages that are ONLY currently installed
2
votes
0answers
147 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 ...
1
vote
1answer
184 views

How does Ubuntu remembers process history?

Recently I noticed two things in my Ubuntu-13.10(32-bit) and would like to get cleared. Scenario-1: One of the functionality of terminal is that you can get previous commands by using "UP" arrow ...
1
vote
1answer
84 views

Clearing OS Cache

I'm guessing that's what it is. I reinstalled Ubuntu and replaced my newly created home directory with my old home directory. Problem is, my new Ubuntu doesn't have XYZ program installed and when I ...
1
vote
0answers
39 views

Set XDG Cache for Chromium

I want to use the XDG standard to export Chromium's cache to /tmp/chromium, which I've mounted in RAM. I'll do this with a script in /etc/profile.d. But the contents of the file I don't know. If I ...