[c-nsp] N5K (vm.drop_caches)

[Andrew Miehs]

Google is your friend...

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.



On Tue, May 14, 2013 at 7:55 PM, Manu Chao <linux.yahoo at gmail.com> wrote:

> Any idea about this vm.drop.cache syslog message on Nexus 5548:
>
>
> %AUTHPRIV-5-SYSTEM_MSG:     root : TTY=console ;
> PWD=/var/sysmgr/sysmgr-subproc ; USER=root ; COMMAND=/sbin/sysctl -q -w
> vm.drop_caches=3 - sudo
>
>
> Any help will be appreciate
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