It is done only once when the configuration file is evaluated.
I think it is obvious that the rewrite is done every time :-)

On 08/29/2016 09:16 AM, Robert Blayzor wrote:

On Aug 29, 2016, at 11:38 AM, Evan Rempel <erempel@uvic.ca> wrote:

@module confgen context(rewrite) name(r_myself) exec("/bin/hostname")


I guess the only remaining question on this is a performance one.

Would the exec be done for each and every log message or is it done only once?

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Robert
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Evan Rempel                                      erempel@uvic.ca
Senior Systems Administrator                        250.721.7691
Data Centre Services, University Systems, University of Victoria