[GitHub] wido commented on a change in pull request #3127: Improve System VM startup and memory usage [4.11]

[GitBox <gi...@apache.org>]

wido commented on a change in pull request #3127: Improve System VM startup and memory usage [4.11]
URL: https://github.com/apache/cloudstack/pull/3127#discussion_r250552812
 
 

 ##########
 File path: systemvm/debian/etc/cron.hourly/clear_cache
 ##########
 @@ -0,0 +1,8 @@
+#!/bin/bash
+
+# clear memory cache to ultimately reduce swapping
+
+phymem=$(free|awk '/^Mem:/{print $2}')
+if [ $phymem -lt 513000 ]; then
+  sync && echo 1 > /proc/sys/vm/drop_caches
 
 Review comment:
   Same applies here. The kernel is the one who clears the page cache if it needs the memory for something else

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