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11-29-2008
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Free Linux Memory by Dropping Caches
Linux Kernels 2.6.16 and up provide a way to instruct the kernel to drop the page cache, inode and dentry caches on command. This tip can help free Linux memory without a reboot.
Note: This is a non-destructive operation. Dirty objects are not freeable, hence; you must run sync beforehand. To use /proc/sys/vm/drop_caches, you simply echo a number to it. To free pagecache: Code:
# sync; echo 1 > /proc/sys/vm/drop_caches Code:
# sync; echo 2 > /proc/sys/vm/drop_caches Code:
# sync; echo 3 > /proc/sys/vm/drop_caches |
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| drop_caches, linux, memory, proc filesystem |
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