Linux人工清理內存cache
阿新 • • 發佈:2018-06-21
hat and opera memory des struct ron span ati , use echo 2 > /proc/sys/vm/drop_caches;
to free pagecache, dentries and inodes, use echo 3 > /proc/sys/vm/drop_caches.
Because this is a non-destructive operation and dirty objects are not freeable, the user should run sync first.
內存緩存的出現是解決,設備之間的讀寫速度的差異!
00、linux緩存解釋
/proc/sys/vm/drop_caches (since Linux 2.6.16)
Writing to this file causes the kernel to drop clean caches,dentries and inodes from memory, causing that memory to become free
sync //fist act!!!
To free pagecache, use echo 1 > /proc/sys/vm/drop_caches;
to free dentries and inodes
to free pagecache, dentries and inodes, use echo 3 > /proc/sys/vm/drop_caches.
Because this is a non-destructive operation and dirty objects are not freeable, the user should run sync first.
Linux人工清理內存cache