The cache tag has no wiki summary.
2
votes
2answers
213 views
`free`: output format
I use free to get the amount of free space on some of my servers. Its output is something like:
$ free -m
total used free shared buffers cached
Mem: 374 ...
1
vote
2answers
73 views
TLB cache flusing when a page is swapped out
I recently heard that Linux simply flushes the TLB cache when the corresponding data in that physical address is swapped out, resulting in underutilization of the TLB. I don't know whether all OSes do ...
34
votes
2answers
6k views
How do I clear Bash's cache of paths to executables?
When I execute a program without specifying the full path to the executable, and Bash must search the directories in $PATH to find the binary, it seems that Bash remembers the path in some sort of ...
11
votes
6answers
2k views
Linux equivalent to ReadyBoost?
Is there a kernel module or some other patch or something similar to Windows' ReadyBoost?
Basically I'm looking for something that allows disk reads to be cached on a Flash drive.
5
votes
2answers
826 views
How to time grep commands accurately?
I want to compare the speed of these two commands:
grep pattern1 files*
grep pattern2 files*
Unfortunately, the first grep reads much of files* into memory
buffers, so the second grep runs ...
5
votes
5answers
7k views
dns queries not using nscd for caching
I'm trying to use nscd (Nameservices Cache Daemon) to cache dns locally so I can stop using bind to do it. I've gotten it started and ntpd seems to attempt to use it. But everything else for hosts ...
4
votes
4answers
167 views
If I have an SSD and a hard disk in a system, can the SSD act as cache for the hard disk?
Say I have some partitions; one on a SATA drive and one on an SSD. I want to create a "virtual" hybrid disk. Is this possible?
2
votes
1answer
363 views
What is the buffers column in the output from free?
These questions briefly list the format of the free command, noting that buffers is kernel memory that must be written out to disk and cache is file data that does not need to be written disk.
On my ...
0
votes
1answer
143 views
Does linux have something like supercache?
I installed http://www.superspeed.com/desktop/supercache.php for windows and the result is awesome.
Every program I run is faster.
Basically it uses the memory to cache data. Simple idea. I also use ...
