[syslog-ng] Performance analysis (was Re: UDP packet loss with syslog-ng)

[Lars Kellogg-Stedman]

I've run a series of tests against our log server, using
loggen-generated logging rates of 100, 1000, 2000, 4000, 8000, 16000,
and 32000 messages/sec, and measured the results for each rate using
socket buffer sizes ranging from 128KB to 16M.  The results show,
essentially, what buffer size you need to meet a target rate of
message logging.

So I'm happy now, and I'm getting the sort of rates I expect to be
able to support.  I figured other folks might like the data.  I've put
the raw data online as well as a graph of the results:

  http://drop.io/syslog_ng

The graph shows so_rcvbuf() size along the X axis, and packet loss
along the Y axis.