[Xymon] mismatch value between apache and xymon http/s response time

|Hi all, i have noted a mismatch between values from my apache (version 2.2) logs (http, https)

(%D| The time taken to serve the request, in microseconds), and http response times in xymon.

For example https test:

1614 (from ssl request log)

Seconds: 0.34 (from xymon)

http test:

606 (from access log - http)

Seconds: 0.06 (from xymon)

thanks for any suggestions

Marco