FS Cache

• 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

• 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

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

vmtouch -v server.tar.gz                                                                                                                                                                          
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         Elapsed: 5.8e-05 seconds