ZFS RAM usage more precise.

[pve-docs.git] / pve-installation.adoc

diff --git a/pve-installation.adoc b/pve-installation.adoc
index 917f2cdbf07222a023c77042b765bf0475d793db..cf32851f55cfecb2e1c33ae8fcdab97b33daec80 100644 (file)
--- a/pve-installation.adoc
+++ b/pve-installation.adoc
@@ -135,8 +135,9 @@ required for lvmthin snapshots).
 ZFS Performance Tips
 ^^^^^^^^^^^^^^^^^^^^
 
-ZFS uses a lot of memory, so it is best to add additional 8-16GB RAM
-if you want to use ZFS.
+ZFS uses a lot of memory, so it is best to add additional RAM if you
+want to use ZFS. A good calculation is 4GB plus 1GB RAM for each TB
+RAW disk space.
 
 ZFS also provides the feature to use a fast SSD drive as write cache. The
 write cache is called the ZFS Intent Log (ZIL). You can add that after
@@ -158,7 +159,7 @@ Install {pve} on Debian
 ~~~~~~~~~~~~~~~~~~~~~~~
 
 {pve} ships as a set of Debian packages, so you can simply install it
-on top of a normal Debian installation.  After configuring the
+on top of a normal Debian installation. After configuring the
 repositories, you need to run:
 
 [source,bash]
@@ -198,4 +199,3 @@ See Also
 * link:/wiki/Installation:_Tips_and_Tricks[Installation: Tips and Tricks]
 
 endif::wiki[]
-