log: add support for logging max instead of averages

[fio.git] / fio.1

diff --git a/fio.1 b/fio.1
index 6cc6379e14bc7718362d00fe226f9a4f2cb51cb4..246bcd25d22c050e3a8c7054fba3a4277105035d 100644 (file)
--- a/fio.1
+++ b/fio.1
@@ -1423,8 +1423,13 @@ then the filename will not include the job index.
 By default, fio will log an entry in the iops, latency, or bw log for every
 IO that completes. When writing to the 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.
+over the specified period of time, reducing the resolution of the log. See
+\fBlog_max\fR as well.  Defaults to 0, logging all entries.
+.TP
+.BI log_max \fR=\fPbool
+If \fBlog_avg_msec\fR 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.
 .TP
 .BI log_offset \fR=\fPbool
 If this is set, the iolog options will include the byte offset for the IO