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Commands tagged cache from sorted by
Terminal - Commands tagged cache - 10 results
nocache <I/O-heavy-command>
2013-05-21 15:15:05
User: michelsberg
21

We all know...

nice -n19

for low CPU priority.

ionice -c3

for low I/O priority.

nocache can be useful in related scenarios, when we operate on very large files just a single time, e.g. a backup job. It advises the kernel that no caching is required for the involved files, so our current file cache is not erased, potentially decreasing performance on other, more typical file I/O, e.g. on a desktop.

http://askubuntu.com/questions/122857

https://github.com/Feh/nocache

http://packages.debian.org/search?keywords=nocache

http://packages.ubuntu.com/search?keywords=nocache

To undo caching of a single file in hindsight, you can do

cachedel <OneSingleFile>

To check the cache status of a file, do

cachestats <OneSingleFile>
dscacheutil ?flushcache
sudo sync && sudo echo 3 | sudo tee /proc/sys/vm/drop_caches
2012-03-17 08:27:58
User: StephenJudge
Functions: echo sudo sync tee
Tags: memory cache
-2

"That's it. Not much to see here. The first command writes any cache data that hasn't been written to the disk out to the disk. The second command tells the kernel to drop what's cached. Not much to it. This invalidates the write cache as well as the read cache, which is why we have the sync command first. Supposedly, it is possible to have some cached write data never make it to disk, so use it with caution, and NEVER do it on a production server. You could ... but why take the risk?

As long as you are running a post 2.6.16 kernel,..."

Source: http://ubuntuforums.org/showpost.php?p=3621283&postcount=1

cat <file> > /dev/null
2011-11-12 15:45:27
User: totti
Functions: cat
Tags: ram file cache
8

Best result when file size less than half of RAM size

kill -SIGHUP `cat /var/run/mydns.pid`
2011-10-21 14:29:24
User: ironmarc
Functions: kill
1

Occasionally, to force zone updating, cache flush is necessary. This command is better than restart the mydns daemon.

rndc flush
2011-10-21 14:27:05
User: ironmarc
Functions: rndc
2

Occasionally, to force zone updating, cache flush is necessary. Use this command is better than restart the Bind9 process.

sysctl -w vm.drop_caches=3
sync && echo 3 | sudo tee /proc/sys/vm/drop_caches
find ~/.mozilla/firefox/*/Cache -exec file {} \; | awk -F ': ' 'tolower($2)~/mpeg/{print $1}'
2010-04-19 06:59:55
User: sata
Functions: awk file find
2

Grab a list of MP3s (with full path) out of Firefox's cache

Ever gone to a site that has an MP3 embedded into a pesky flash player, but no download link? Well, this one-liner will yank the *full path* of those tunes straight out of FF's cache in a clean list.

Shorter and Intuitive version of the command submitted by (TuxOtaku)

for i in `ls ~/.mozilla/firefox/*/Cache`; do file $i | grep -i mpeg | awk '{print $1}' | sed s/.$//; done
2010-04-11 23:14:18
User: TuxOtaku
Functions: awk file grep sed
4

Ever gone to a site that has an MP3 embedded into a pesky flash player, but no download link? Well, this one-liner will yank the names of those tunes straight out of FF's cache in a nice, easy to read list. What you do with them after that is *ahem* no concern of mine. ;)