/usr/share/rosgraph_msgs/msg/TopicStatistics.msg is in ros-rosgraph-msgs 1.11.2-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 | # name of the topic
string topic
# node id of the publisher
string node_pub
# node id of the subscriber
string node_sub
# the statistics apply to this time window
time window_start
time window_stop
# number of messages delivered during the window
int32 delivered_msgs
# numbers of messages dropped during the window
int32 dropped_msgs
# traffic during the window, in bytes
int32 traffic
# mean/stddev/max period between two messages
duration period_mean
duration period_stddev
duration period_max
# mean/stddev/max age of the message based on the
# timestamp in the message header. In case the
# message does not have a header, it will be 0.
duration stamp_age_mean
duration stamp_age_stddev
duration stamp_age_max
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