X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=HOWTO;h=6d80360574e0c89899756cbc6a1d9838293c9c81;hb=e6989e10964f5ae30e0ba8f0cd27a663baf5617b;hp=4a910a1ac11716d57c3885cf2c2f4fd63f0fa944;hpb=3bb85e8443d626ee71a4126dbe6ebcaf751527f1;p=fio.git

diff --git a/HOWTO b/HOWTO
index 4a910a1a..6d803605 100644
--- a/HOWTO
+++ b/HOWTO
@@ -1570,8 +1570,12 @@ log_avg_msec=int By default, fio will log an entry in the iops, latency,
 		disk log, that can quickly grow to a very large size. Setting
 		this option makes fio average the each log entry over the
 		specified period of time, reducing the resolution of the log.
-		Defaults to 0.
+		See log_max as well. Defaults to 0, logging all entries.
 
+log_max=bool	If log_avg_msec is set, fio logs the average over that window.
+		If you instead want to log the maximum value, set this option
+		to 1. Defaults to 0, meaning that averaged values are logged.
+.
 log_offset=int	If this is set, the iolog options will include the byte
 		offset for the IO entry as well as the other data values.