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Drop Caches

Kernels 2.6.16 and newer provide a mechanism to have the kernel drop the page cache and/or inode and dentry caches on command, which can help free up a lot of memory. Now you can throw away that script that allocated a ton of memory just to get rid of the cache...

To use /proc/sys/vm/drop_caches, just echo a number to it.

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!

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¸®´ª½º ¹öÀüÀº CentOS 4.5
Ä¿³Î¹öÀüÀº 2.6.9-55
ªÀº±Û Àϼö·Ï ½ÅÁßÇÏ°Ô.
¸ù¸ù 2009-07
ÇöÀçÀÇ Ä¿³Î¹öÀüÀº 2.6.9-55
Áö¿øÇÏ´Â Ä¿³ÎÀº Kernels 2.6.16 and newer

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¸Þ¸ð¸®¿¡ filesystem buffer ij½ÌµÈ°Å¸é sync ¸í·É¾²¸é µË´Ï´Ù.
±Ç±¹ºÀ 2009-07
¸»¾¸ÇϽŠdrop_caches ±â´ÉÀº Á» À§ÇèÇÕ´Ï´Ù.

ÀÏ´Ü ±â´ÉÀ¸·Î ³ª¿ÍÀÖ±â´ÂÇϳª 2.6.23 Ä¿³Î¿¡¼­ ÆÄÀÏ ½Ã½ºÅÛ¿¡ ¿©·¯¹ø ¹®Á¦°¡ µÈÀûÀÌ ÀÖ½À´Ï´Ù.

Á¦°¡ ã¾Æº» ±Û¿¡ ÀÇÇÏ¸é °³¹ß¿ëÀ¸·Î »ç¿ëÇÒ ¼ö ÀÖÁö¸¸ ¿î¿µ¿ëÀ¸·Î´Â ÀûÇÕÇÏÁö ¾Ê´Ù´Â ÆÇ´ÜÀÌ µì´Ï´Ù.

Âü°í Çϼ¼¿ä. ;
Á¤Èñ¼· 2009-07
top ¿¡¼­ cached ·Î ÀâÈ÷´Â°Å ¸»¾¸ÇϽô°Ÿé Áö¿ì½Ç ÇÊ¿ä°¡ ÀÖ³ª ½Í³×¿ä???


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