FS Cache

Cache takarítás

https://discuss.aerospike.com/t/tuning-kernel-memory-for-performance/4195

Flush RW cache:

sync

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

Cache kikapcsolás

http://serverfault.com/questions/500874/ext3-with-no-write-cache

Mountolás:

mount -o sync -t ext3 /dev/sda1 /mnt/foo

Újra mountolás:

mount -o remount,sync /mnt/foo

cache állapota

https://medium.com/marionete/linux-disk-cache-was-always-there-741bef097e7f

vmtouch -v server.tar.gz
server.tar.gz
[ ] 0/2
Files: 1
Directories: 0
Resident Pages: 0/2 0/8K 0%
Elapsed: 5.8e-05 seconds