the os of my box is CentOS 5.3 and httpd is the built-in one. > it may mean that the requests didn't take long to server AND the clock > is not high resolution I thought so as well, but about 90% of the requests are around 10_000-100_000µs. Meanwhile 0µs requests are about 5%. It's hard to believe that is a resolution issue. Also the rate of 0µs request goes up with server's load going up, not a good sign, I guess. Arrrr, it might be something like the requests under 1000µs goes to 0µs into log file by chance? On Thu, Jul 15, 2010 at 12:20 AM, Jeff Trawick <trawick@xxxxxxxxx> wrote: > On Wed, Jul 14, 2010 at 10:19 AM, Hu Hailin <i@xxxxxxxx> wrote: >> Hi, >> >> http://httpd.apache.org/docs/2.2/en/mod/mod_log_config.html#formats >> >> I'm using %D to log the time taken to serve requests. >> I found the time might be 0 in nonspecific requests. The rate of 0 >> serving time goes the same trend with server load. >> >> Does it mean some kind of timeout? > > no > > it may mean that the requests didn't take long to server AND the clock > is not high resolution > > is this Windows? if I understand correctly, expensive (in CPU) > mechanisms are required to get good resolution on Windows > > --------------------------------------------------------------------- > The official User-To-User support forum of the Apache HTTP Server Project. > See <URL:http://httpd.apache.org/userslist.html> for more info. > To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx > " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx > For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx > > -- islue --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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