Possible to create seperate logging for objects fetched to upstream in reverse proxy mode?

Arvind Jayaprakash work at anomalizer.net
Sun Mar 28 13:40:52 MSD 2010

On Mar 22, David Taveras wrote:
>Iam running a reverse proxy.. works great. I was diferrentiating
>objects that served locally because they have a 0.00 processing time..
>versus the objects that are fetched from the upstream... however i now
>see that this isnt at all true!
>Sometimes in my SSL server i fetch files from cache that actually take
>1.10 .. (maybe due to the ssl handshake) .. so I dont really have a
>way of knowing which files are actually fetched from the upstream.
>Is it possible to set a log for requests made to the upstream only?

Have you tried logging this variable?

For requests that were not sent to an upstream, a dash i.e. "-" gets

$upstream_cache_status might also be of interest if you are using nginx

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