Understand the log lines in influxdb for data sent via telegraf

I am collecting some metrics into influxdb using telegraf.

When I check influxdb logs using journalctl I see the following type of log line
Jul 05 12:56:30 he-454-0c.prod influxd[51581]: [httpd] ::1 - username [05/Jul/2019:12:56:30 +0000] “POST /write?consistency=any&db=telegraf_dev&rp=autogen HTTP/1.1” 204 0 “-” “-” 4ee885b5-9f24-11e9-9186-ac1f6b6265c6 3151

I want to understand the contents in this log line. Most importantly what is the number 3151 at the end. is it something like the amount of data in bytes?
Where can I find documentation around it.