httpd-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Frederik Nosi <>
Subject Re: [users@httpd] Apache24 - how to optimize httpd.conf
Date Tue, 09 Jun 2015 13:51:00 GMT
Hi Rainer,

On 06/09/2015 02:53 PM, Rainer Canavan wrote:
>>>   Remove etags (Header unset Etag/FileETag None)
>> Won't this disable conditional requests, ex. If-None-Match and friends? Is
>> your recomendation because of the header overhead or am I missing something?
> Just if-None-Match. If-Modified-Since would still work. I believe
> people recommend disabling ETags because they may cause problems with
> clusters (i.e. different inode numbers or modification times for
> otherwise identical files), or gzip content encoding
> (

Well, if it's a static file i think the etag calculation should be quite 
fast, after all in the default apache setting it's computed using thre 

FileETag INode MTime Size

which at least on linux should be cached in the dentry / filesystem cache.

So intuitively should be less work then reading this values, the file 
content and sending it.
It's not that i've done measurements on this though, just speculation.

As for the cluster case (and for security reasons), i've been using:

FileETag MTime Size

Out of curiosity, does somebody have real misurements?

> rainer
> ---------------------------------------------------------------------
> To unsubscribe, e-mail:
> For additional commands, e-mail:

To unsubscribe, e-mail:
For additional commands, e-mail:

View raw message