Questions tagged [cache]
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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How to resolve "broken cache" when installing shiny-server with gdebi
I am trying to install this shiny-server software (https://posit.co/download/shiny-server/) on Ubuntu 22.04.02.
I receive an installation error and can't see any of the details due to this "...
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Optimize system for rapidly loading large volumes of data
I'm running a complex Matlab program on my Ubuntu computer. It needs to load several .MAT files, each of which is several GB on disk and larger in RAM. I know it is possible to run this program - a ...
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kmv/qemu vm guests and host are connected through shared memory to collect and cache data beteween them
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The configuration: host: Ubuntu:20.04 OS, guest: Ubuntu20.04 OS. The two files use the 9p file system for interworking.
The current progress is as follows: the mmap function in C language is used to ...
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How to Increase RAM cache/buffer on ubuntu 22.04 desktop
i have 32GB Ram I noticed my Cache is usually around 5gb or less. The most of my ram is wasting. in my understanding RAM's Cache is to speed up system and performance.
so I was wondering are there ...
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Is it a good practice to restart VPS server everyday?
I am building an app server using Ubuntu 20.04 and will be serving thousands of clients with potentially a million http messages everyday.
I wanted to ask if it is a good practice to restart my server ...
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How to configure common folder as pip cache for across all users?
Situation:
I have multiple users with their home folders under /home.
All of them are added to a group, e.g., pipcache, with read-write permissions on a common folder (e.g., /home/pipcache).
Yet, I'...
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' Unknown Error: '<class 'KeyError'>' ("the cache has no package named 'linux-headers-5.19.0-41-generic:amd64'")'
I am relatively new to Ubuntu, and have just installed version 20.04 onto a 120GB solid state drive. I have just gotten this error and noticed that neither my WiFi nor my Ethernet are working, I have ...
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How to Download entire Ubuntu Software Repository in to the cache for easy offline use when no internet connection
How to fill apt-cache of all programs.
Download the entire Ubuntu Software center into apt cache for offline use.
sudo apt-get install --download-only *
Deb files.
Size Don't Matter
Binary 64x deb ...
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How to recover data from drives in bcache configuration
I'm trying to recover the data in hard drives that was set up in raid and bcache.
I'm using ubuntu 22.04 and just migrate the two hard drives in raid 1 to another computer.
I have no longer the ssd ...
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Can I blacklist a website from DNS cache Ubuntu 22.04
I'm having trouble with a specific university related site on Ubuntu 22.04. I have to flush DNS cache every time I want to access it as it seems that the main link and the link with a path point to ...
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I'm not sure where to start with updates vs specific errors - refreshing cache, Bluetooth, general updates, all the issues
Truthfully, I'm a bit at my wits end here since I can't seem to mentally tackle the logical 'first this, then that's part of my issue(s) and simply must ask for assistance.
I've attempted to update ...
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Cannot boot. TPM Interrupt not working
I have installed Ubuntu 22.04 on my Acer C720 Chromebook. When I cleared the cache, I tried to boot Ubuntu with Ctrl+Alt+L, which resulted in this screen:
[ 0.260118] tpm tpm0: [Firmware Bug]: TPM ...
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Use a file on SSD as cache for an HDD
I'm using Ubuntu Server 22.04. The server has an HDD in it, and I'd like to be able to speed up disk access for that HDD. My system boots from an SSD, so my idea is that maybe I can use space on the ...
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Ubuntu 20.04, Memory cache exhausts immediately upon booting
I'm not a supernerd, but I know some stuff, and I'm pretty sure my system is not supposed to work like this.
I recently reinstalled Ubuntu 20.04 from the bones up on my home-built desktop because I ...
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Unable to Boot - Stuck on "[sda] Assuming drive cache: write through"
How do I boot to Ubuntu desktop?
I am running Ubuntu 18.04 on VMWare Workstation. It was running fine until I had to expand my hard drive. Then, it showed the "SMBus Host Controller not enabled!&...
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Any issues with disabling local DNS Cache on Ubuntu Server 18.04 or 20.04 or 22.04
My Ubuntu 18.04 server is used to create websites and initiate SSL's via an Admin panel. The issue is that when I initiate the SSL I like to have the server check the DNS record, but since the client ...
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how to clear DNS cache in 22.04?
How is the DNS cache cleared in 22.04?
The method that worked in 20.04:
systemd-resolve --flush-caches
no longer works.
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encrypted ubuntu
I am new to zfs.
I read, and sucessfully tested, that encrypted zfs is working.
This is a professional laptop so full encryption is required.
Current (20.04) setup is separate / and /home, both luks ...
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Write cache / delay as long as possible
I am trying to setup Linux to delay the writes as much as possible (minutes). To those wondering why: this is Chia plotting. It is very write intensive done in SSD/NVMe, if the system crashes you have ...
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drop_cache Permissions Denied
I was following https://www.tecmint.com/clear-ram-memory-cache-buffer-and-swap-space-on-linux/ and I realized that I had no permissions for /proc/sys/vm/drop_caches. I even used sudo su and it still ...
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drop_caches hangs for 1-2 min and maxes cpu before completing
If I have been logged into the Ubuntu 18.04 graphical console for a while and run either:
echo 2 >| /proc/sys/vm/drop_caches
echo 3 >| /proc/sys/vm/drop_caches
the process takes almost 2 ...
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KDE KIO caches all network media before viewing
What is kioexec? Why does it run every time I try and open a picture or video? It appears to copy the entire file to ~/.cache before viewing. Same happens w/ VLC and other media applications as well....
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How to install Signal on Ubuntu [duplicate]
Whenever I try to install Signal on my Ubuntu, I get the following cache error message:
<Malformed entry 1 in list file /etc/apt/sources.list.d/signal-xenial.list ([option] not assignment)>
How ...
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Ubuntu 20.04 Error: Opening the Cache
I have been getting this error for months:
Error: Opening the cache(E: can not open /var/lib/apt/lists/
E: The package lists or status file could not be parsed or opened
This usually means your ...
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ubuntu error: opening the cache, permissions denied
I get this error every day on my ubuntu screen:
I am a new user and unable to resolve this. Could any one tell me what is it and how to solve it?
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How to clear cache? [closed]
Result of after entering free in terminal
ronay@MackbookPro:~$ free
total used free shared buff/cache available
Mem: 3893824 2748748 120040 ...
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1
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Running cachefilesd cache on ramdisk (tmpfs) for PXE NFS boot
I am running ubuntu 20.04 LTS (kernel 5.4.0-81-generic) from PXE and I wish to add a local cache. Because I don't want to have a partition on all my devices for caching, I wish to use a ramdisk for ...
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Allow disk cache to use as much of RAM as possible
I recently learned that Ubuntu uses disk cache / filesystem cache (size is displayed in system monitor).
I couldn't see any documentation that says there is a default limit on how much RAM can be used ...
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Appliction software updater has closed unexpectedly
Error in opening the cache, How can i fix this issue getting this from long time
application updater closed unexpectedly, when clicking on updates
Please Help!, not able to solve this
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Please i can not solve these problems? related to updates
Error while refreshing cache problems
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See terminal text. 'Waiting for cache lock' error. How to fix? I'm on Ubuntu 21.04
advait@advait-Bravo-15-A4DDR:~$ sudo apt install ubuntu-restricted-extras
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 43843 (synaptic)
Waiting ...
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Cached Memory Takes all the memory
I've switched to Ubuntu just a couple of months ago. Some days ago, I found out that the system is storing cache in memory which is occupying a lot of space and although I'm getting the benefit of ...
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Why the system unexpectedly reboot with ^@ in log
When reboot happens (last reboot)
The system reboot at Jun 19, 13:14:
reboot system boot 5.8.0-55-generic Sat Jun 19 13:41 still running
What does the /var/log/kern.log say
There are many ...
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Error opening the cache
The error message is:
E:Unable to parse package file /var/lib/apt/lists/ro.archive.ubuntu.com_ubuntu_dists_groovy-updates_In release(1),E:The package lists or status file could not be parsed or opened....
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Does anyone know if VS-Code Cache's data anywhere other than `~/.cache`?
Everywhere I look on google, I find out how to clear the VS-Code cache data on windows. To be fair, even though it is an open source project, its being built from Microsoft's dollar, and by MS ...
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What is RAM Cache?
I noticed this once I installed Ubuntu 20.10. There is 2.1GiB of memory used as "Cache".
I know the CPU, GPU and hard disk's have a cache. I know of swap memory, but this is the first time ...
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why is my memory cache so big?
right now I have only a browser tab running on my laptop, but when I open system monitor, in memory section, It shows:
3.2 GiB (23.2%) of 13.7
Cache 6.1 GiB
why is my Cache so big? is it usual?,
and I ...
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Can we clear memory cache in Ubuntu
In my Ubuntu 20.04 I see 8.7 GB Memory cache in system monitor. Can I clear this, what is the best way to do so?
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Composer Installation Problem
Cannot create cache directory /home/rukon/.cache/composer/repo/https---repo.packagist.org/, or directory is not writable. Proceeding without cache
Cannot create cache directory /home/rukon/.cache/...
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How do you make a SSD cache for a Raid 5 HDD array Ubuntu NAS?
I'm trying to make a NAS in Ubuntu as I like the OS more, and I can install it on a partition of a drive, as opposed to FreeNAS or any dedicated NAS operating systems.
However, one thing I liked about ...
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How to cache a specific folder?
I have a folder that has a things in it that get frequently accessed. Some things get accessed a lot, and some don't. How can I set it up so that if something gets accessed enough times (i.e. 3 times) ...
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Progress bar on copying files to USB
On the Nautilus file manager, when copying any file to a flash drive, the progress bar will immediately go to 100%, signifying the transfer has completed. The issue is that the files have only been ...
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Clear dnsmasq cache without restarting the service
I have cache enabled in my dnsmasq, because it is fast.
In some situations (for example, with VPN off), dnsmasq caches wrong results. I want a quick way to clean the cache (when I connect to the VPN ...
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How to disable disk cache of NVMe SSD
I know hdparm -W0 /dev/sata-ssd can disable disk cache for SATA SSD, but this does not work on my NVMe SSD (i.e., Samsung 980 pro). Maybe some option of nvme can do it, but I failed to find it.
How ...
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How to get apt-cacher-ng to download AND cache packages from Apt HTTPS repositories?
Typically Apt packages are served over bare HTTP and the downloaded contents are verified with GPG signatures. This makes it easy for apt-cacher-ng to proxy the HTTP connections and add the downloaded ...
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Is there something similar of windows "SetProcessWorkingSetSize" for linux?
I run into a memory leak on google chrome when running my script as it sends clicks very fast.
I created an example code, in how to reproduce the leak on my post on StackOverflow:
https://...
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Cache music streaming (Spotify) Location
I am characterizing traffic from streaming services, specifically Spotify. I notice that a song is streamed once, and then, if the song is replayed, only few traffic is generated. Hence, that song is ...
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LVM Slow flush of cached dirty blocks
I have a system with two 4TB SATA disks and two 1TB NVME disks setup in two mirrors using mdadm.
Ubuntu 20.04 installed with one boot on md0 and the rest (md1) is added to vg0 with a root lv with ext4....
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Minimizing SWAP usage, but Cache is forcing Ubuntu to use SWAP
I have a 128 GB SSD (with DRAM cache) and 1 TB HDD. I have installed Ubuntu 20.04 in the SSD (/, /home, swap [8GB] in SSD and data in HDD). My PC has 8 GB RAM. I have reduced swappiness to 20 from 60 ...
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Does ubuntu ever clear ~/.cache automatically?
I was wondering whether by default there's anything in place that clears the .cache folder. To my understanding .cache is similar to /tmp, at least I am seeing it being used like that.
Meaning that ...
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