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--- doc:appunti:linux:sa:linux_virtual_memory [2023/12/18 12:06] – [Diagnosi di Out of Memory Killer] niccolo
+++ doc:appunti:linux:sa:linux_virtual_memory [2023/12/18 12:42] (current) – [Come rilasciare la cache] niccolo
@@ Line 51: / Line 51: @@
 ^ Active(file)  | The amount of file cache memory, in kibibytes, that is in active use, or was in active use since the last time the system reclaimed memory.  |
+===== Come rilasciare la cache =====
+Per rilasciare le **PageCache** si può usare il comando:
+<code>
+sync; echo 1 > /proc/sys/vm/drop_caches
+</code>
+Dovrebbero andare a zero diversi contatori, tra cui quello della **Active** memory.
+Il parametro **1** scritto nello pseudofile può assumere valori diversi, a seconda di cosa si voglia rilasciare:
+^ 1  | Clears only the page cache.  |
+^ 2  | Clears dentries and inodes.  |
+^ 3  | Clears page cache, dentries, and inodes.  |
 ===== Web References =====
@@ Line 57: / Line 71: @@
   * **[[https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/deployment_guide/s2-proc-meminfo|/proc/meminfo]]**
   * **[[https://access.redhat.com/solutions/406773|Interpreting /proc/meminfo and free output for Red Hat Enterprise Linux]]**
+  * **[[https://www.tecmint.com/clear-ram-memory-cache-buffer-and-swap-space-on-linux/|How to Clear RAM Memory Cache, Buffer and Swap Space on Linux]]**