Changes between Version 18 and Version 19 of jazz/Performance_Tuning

Timestamp:

Aug 22, 2010, 1:57:53 AM (14 years ago)

Author:

jazz

Comment:

--

jazz/Performance_Tuning

@@ -39 +39 @@
 echo "kernel.shmmni = 4096"      >> /etc/sysctl.conf
 }}}
+
+ * Cache Memroy - 
+   * 設定 vm.drop_caches 觸發 kernel 回收用於 cache 的記憶體。
+{{{
+echo 1 > /proc/sys/vm/drop_caches
+    or
+sysctl -w vm.drop_caches=1
+}}}
+   * 設定 vm.vfs_cache_pressure 使 kernel 更勤於回收 cache。
+{{{
+sysctl -w vm.vfs_cache_pressure=n  (n > 100)
+]}}
 
 == System Performance Tuning : File System ==