installation: align zfs performance tip with PVE documentation

This one is IMO better worded, so just use that.

Signed-off-by: Christoph Heiss <c.heiss@proxmox.com>

diff --git a/pmg-installation.adoc b/pmg-installation.adoc
index 1d2f7b2c5b330ef22eef64f4c3c493a5e248622a..9f43f707c95d9153654aa47e7bb492530b359d9f 100644 (file)
--- a/pmg-installation.adoc
+++ b/pmg-installation.adoc
@@ -260,16 +260,17 @@ required for lvmthin snapshots).
 ZFS Performance Tips
 ~~~~~~~~~~~~~~~~~~~~
 
-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
+ZFS works best with a lot of memory. If you intend to use ZFS make sure to have
+enough RAM available for it. A good calculation is 4GB plus 1GB RAM for each TB
 RAW disk space.
 
-ZFS also provides the ability to use a fast SSD drive as write cache. The
-write cache is called the ZFS Intent Log (ZIL). You can add that after
-the installation using the following command:
-
- zpool add <pool-name> log </dev/path_to_fast_ssd>
+ZFS can use a dedicated drive as write cache, called the ZFS Intent Log (ZIL).
+Use a fast drive (SSD) for it. It can be added after installation with the
+following command:
 
+---
+# zpool add <pool-name> log </dev/path_to_fast_ssd>
+---
 
 [[pmg_install_on_debian]]
 Install {pmg} on Debian