Is there any command that by using I can clean the cache in RHEL?
I used this command:
sync; echo 3 > /proc/sys/vm/drop_caches
but it didn’t work.
Answers:
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Method 1
Depending on what you want to do you can use 1,2 or 3
from https://www.kernel.org/doc/Documentation/sysctl/vm.txt
drop_caches
Writing to this will cause the kernel to drop clean caches, dentries and
inodes from memory, causing that memory to become free.
To free pagecache:
echo 1 > /proc/sys/vm/drop_caches
To free dentries and inodes:
echo 2 > /proc/sys/vm/drop_caches
To free pagecache, dentries and inodes:
echo 3 > /proc/sys/vm/drop_caches
As this is a non-destructive operation and dirty objects are not freeable, the
user should run ‘sync’ first.
Method 2
Try sync; echo 1 > /proc/sys/vm/drop_caches.
All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0