On Sat, Oct 19, 2013 at 6:24 AM, Christian Aistleitner <
On Fri, Oct 18, 2013 at 07:01:40PM -0700, Matthew Walker wrote:
tldr; Do we have data on the number of compressed
Hoping that others chime in on this, as I could not find such data.
AFAIK, this is the first time that we get this data request.
As you suggested in IRC that you could use the output of
and compare sizes to determine whether or not the response was
compressed or not, I did some random checks:
* Comparing existing logs with Content-Lengths for Content-Encoding
gzip and unencoded responses, field 7 of  indeed typically
matches either of those lengths. So it does not hold the
uncompressed length. I updated  accordingly.
Thanks Christian! Nice detective work.
* For a few random pages I checked our existing logs, and it seems
that for <5% requests field 7 of  matches the uncompressed
length. For >90% it matches the gzipped length. I know it's
completely unrepresentative, but I hope it helps for
feasibility/order of magnitude computations.
It would be useful to have a table with the source of the webrequest
logline (varnish, squid, nginx) and whether the logline is compressed or
not. As it seems that <5% is affected it could be that the Nginx (SSL and
IP6 traffic) is configured slightly different then the Varnish and Squid
servers but this is a hypothesis that should be checked. We can also check
this by mimetype if the first hypothesis has inconclusive results.
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