From 49dd63a9bd7adeab1a4a1d82f2341091867fa34e Mon Sep 17 00:00:00 2001
From: Allan Jude <allanjude@FreeBSD.org>
Date: Thu, 18 May 2017 12:55:07 +0000
Subject: [PATCH] Explain the new fields in top(1) related to ZFS compressed
 ARC

Reviewed by:	bcr
X-MFC-with:	316314
Differential Revision:	https://reviews.freebsd.org/D10781
---
 usr.bin/top/top.local.1 | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/usr.bin/top/top.local.1 b/usr.bin/top/top.local.1
index 46a959f84c02..a77fb5fae257 100644
--- a/usr.bin/top/top.local.1
+++ b/usr.bin/top/top.local.1
@@ -2,9 +2,10 @@
 .SH "FreeBSD NOTES"
 
 .SH DESCRIPTION OF MEMORY
-Mem: 9220K Active, 1M Inact, 1M Laundry, 3284K Wired, 2M Buf, 932K Free
-ARC: 2048K Total, 342K MRU, 760K MFU, 272K Anon, 96K Header, 442K Other
-Swap: 91M Total, 79M Free, 13% Inuse, 80K In, 104K Out
+Mem: 61M Active, 86M Inact, 368K Laundry, 22G Wired, 102G Free
+ARC: 15G Total, 9303M MFU, 6155M MRU, 1464K Anon, 98M Header, 35M Other
+     15G Compressed, 27G Uncompressed, 1.75:1 Ratio, 174M Overhead
+Swap: 4096M Total, 532M Free, 13% Inuse, 80K In, 104K Out
 .TP
 .B K:
 Kilobyte
@@ -54,8 +55,20 @@ number of ARC bytes holding in flight data
 .B Header:
 number of ARC bytes holding headers
 .TP
-.B Other
+.B Other:
 miscellaneous ARC bytes
+.TP
+.B Compressed:
+bytes of memory used by ARC caches
+.TP
+.B Uncompressed:
+bytes of data stored in ARC caches before compression
+.TP
+.B Ratio:
+ratio of uncompressed data to total ARC size
+.TP
+.B Overhead:
+amount of overhead from ARC compression
 .SS Swap Stats
 .TP
 .B Total: