On Fri, 27 May 2005 08:57:02 -0700, Jeremy Wadsack
<[EMAIL PROTECTED]> wrote:
[EMAIL PROTECTED] wrote:
Then the only
option I would see is that Apache somehow 'ignores' file-sizes in some
situations... (e.g.
for dynamic PHP-pages?)
This could be the issue right here. In Apache, %b is "the size of the
object returned to the client, not including the response headers." I
don't know if this is calculated from the actual bytes transferred or
the Content-Length header sent with the object. There are two
possiblities here. If the Content-Length header is used, then perhaps
you are not setting it in your PHP files. More likely, if the actual
size of the data _sent_ to the client is used, then it's very likely
that many of your visitors are clicking on a large file and then
cancelling the download. So they actually only transfer say 300MB of the
file before they give up or lose connection. This gets logged instead of
the 5GB image size you are expecting.
You could probably do some tests with this fairly easily and find out
what's written to your logs.
I've discovered the reason after this hint indeed. The server seems to
sent massive amounts of 304 messages. They record as no bytes, but due to
the huge amount of them (about half of all generated requests), more
traffic is generated then Apache logs. I've also discovered that Apache
seems to 304 PHP pages as well, which can explain the huge amount of 304's.
On the PHP-pages it send, it doesn't send the actual size of the page, but
the transferred data (the size of the generated HTML). I discovered this
as well in it, so it does not sent the Content-Length header as it
appears. Anyways, I should start modifying my Apache config to reduce the
massive amount of 304 messages...
Meanwhile I still cannot find any explanation for the dip to the 1GB of
data... I suppose it would have been a hick-up in Analog, since I cannot
give any other explanation.
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