Am 25.08.2014 um 19:33 schrieb Frederik Nosi:
Hi,
On 08/19/2014 01:49 PM, Jeff Trawick wrote:
On Tue, Aug 19, 2014 at 6:00 AM, <pratibha.dhank...@wipro.com
<mailto:pratibha.dhank...@wipro.com>> wrote:
Hi All,
Need urgent help from all you experts. We have a tomcat and apache
server on same physical box .Earlier it was working fine however
last week application is integrated with IDAM, since then whenever
user is accessing the link through IDAM application is responding
either very slow or not at all, Once apache is restarted ,again it
start working and after 3-4 hours again same issue occurs. Please
suggest.
Have done some tuning at apache end as well like
Timeout 120
KeepAlive Off
MaxKeepAliveRequests 100
KeepAliveTimeout 15
Still not working.
See if there is a buildup over time of connections between httpd and
Tomcat. netstat and mod_status with ExtendedStatus On would make this
relatively easy. (mod_status won't show explicitly that the request
is handled by Tomcat, but you can check requests stuck in W state to
see if the URL is handled by Tomcat.)
Out of curiosity, on the summary page generated by mod_status, the
description of W is:
"*|W|*" Sending Reply
I thought that when in this state, the corresponding thread / proccess
was sending the reply to the client. From your reply if i understood
correctly seems that when using mod_proxy (and mod_jk right?) the W
state includes the time spent on sending the request and geting a reply
from the origin.
Is this right?
Yes, "W" is everything between having read the request and logging the
request after having send the response. So especially it includes
forwarding in proxy or mod_jk and waiting/reading the response from the
origin server.
You should add response duration logging to the httpd server access log
(%D) and to the origin server log file, if you want to track the
performance of the latter. mod_jk allows you to additionally log origin
server response times as observed by the httpd web server in the httpd
access log.
Regards,
Rainer
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