Decrease vfs cache pressure

On OSD servers we want to keep as much inodes and dentries in memory as
we can.

Signed-off-by: Sébastien Han <sebastien.han@enovance.com>

diff --git a/roles/ceph-common/defaults/main.yml b/roles/ceph-common/defaults/main.yml
index 40733433cf8fa730a4d2c79920a0b5ca97a5a3e2..94335f9cd6c706b6273fe7ed295d7cf394ac8157 100644 (file)
--- a/roles/ceph-common/defaults/main.yml
+++ b/roles/ceph-common/defaults/main.yml
@@ -128,3 +128,4 @@ os_tuning_params:
   - { name: kernel.pid_max, value: 4194303 }\r
   - { name: fs.file-max, value: 26234859 }\r
   - { name: vm.zone_reclaim_mode, value: 0 }\r
+  - { name: vm.vfs_cache_pressure, value: 50 }\r