X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=doc%2Fman%2Flttng.1;h=d4fba11878a3fb095b0b5c14f9310bd721bba0d2;hb=65b95a7f5f5ea3bb205b35458ca9ab9892e108b5;hp=483df2aefab2cd8799d6db18e3b7d7c6dc4bf535;hpb=96fe6b8db99e9c71f0dc1260a0f9ea95b50c2c21;p=lttng-tools.git

diff --git a/doc/man/lttng.1 b/doc/man/lttng.1
index 483df2aef..d4fba1187 100644
--- a/doc/man/lttng.1
+++ b/doc/man/lttng.1
@@ -402,7 +402,8 @@ Apply to the user-space tracer
 Discard event when subbuffers are full (default)
 .TP
 .BR "\-\-overwrite"
-Flight recorder mode : overwrites events when subbuffers are full
+Flight recorder mode: overwrites events when subbuffers are full. The
+number of subbuffer must be 2 or more.
 .TP
 .BR "\-\-subbuf-size SIZE"
 Subbuffer size in bytes {+k,+M,+G}.
@@ -443,7 +444,7 @@ Use shared buffer for the whole system (\-k only)
 Maximum size of each tracefile within a stream (in bytes).
 0 means unlimited. (default: 0)
 Note: traces generated with this option may inaccurately report
-discarded events as per CTF 1.8.
+discarded events as of CTF 1.8.
 .TP
 .BR "\-W, \-\-tracefile-count COUNT"
 Used in conjunction with \-C option, this will limit the number of files
@@ -879,6 +880,10 @@ Name of the snapshot's output.
 Maximum size in bytes of the snapshot. The maxium size does not include the
 metadata file. Human readable format is accepted: {+k,+M,+G}. For instance,
 \-\-max-size 5M
+
+The minimum size of a snapshot is computed by multiplying the total amount of
+streams in the session by the largest subbuffer size. This is to ensure
+fairness between channels when extracting data.
 .TP
 .BR "\-C, \-\-ctrl-url URL"
 Set control path URL. (Must use -D also)