-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Theo,
On 1/25/16 4:12 AM, Theo Sweeny wrote: > Hi Chris - > > On 1/14/16 5:53 AM, Theo Sweeny wrote: >> Hello Kyohei, >> >> -----Original Message----- From: Kyohei Nakamura >> [mailto:nakamura.kyohei....@gmail.com] Sent: 14 January 2016 >> 09:59 To: Tomcat Users List <users@tomcat.apache.org> Subject: >> Re: Tomcat 8 Application dispatcherServlet Stats >> >> What does "response time" mean? >> >> The "Processing time" include a time that is from the end of >> service method of servlet instance until the end of >> StandardWrapperValve#invoke(). >> >> >> 2016-01-14 17:27 GMT+09:00 Theo Sweeny <theo.swe...@avios.com>: >> >>> Hello Kyohei, >>> >>> -----Original Message----- From: Kyohei Nakamura >>> [mailto:nakamura.kyohei....@gmail.com] Sent: 14 January 2016 >>> 06:45 To: Tomcat Users List <users@tomcat.apache.org> Subject: >>> Re: Tomcat 8 Application dispatcherServlet Stats >>> >>> Hello >>> >>> The "Processing time" metric represents the execution time of >>> StandardWrapperValve#invoke(). This is the execution time of >>> the servlet and filters. This value of "Processing time" is the >>> total time of each request execution time. >>> >>> What is the dispatcherServlet? If dispatcherServlet accept all >>> request as a front controller(like Spring's DispatcherServlet), >>> then this value is the total execution time of all request that >>> the context receive. >>> >>> >>> 2016-01-13 20:19 GMT+09:00 Theo Sweeny >>> <theo.swe...@avios.com>: >>> >>>> Hello - at the moment stats can be found for Tomcat 8 web >>>> services using the manager UI /manager/status/all >>>> >>>> Is the "Processing time" metric found under dispatcherServlet >>>> [ / ] subsection, the total time take to serve all requests, >>>> including the response time for each request? >>>> >>>> Regards, >>>> >>>> Theo >>> >>> Does the total execution time for each request include the >>> response time? >>> >>> Thank you, >>> >>> Theo >>> >> >> I think indirectly you have answered my question. From a network >> perspective you have the initial connection time to send the >> request (request time), then you have the time to process the >> request, and finally response time back to the client. Both the >> processing time and response time for the purpose of this task >> are merged under the umbrella of response time. So going full >> circle - the dispatcherServlet Processing time fits the bill of >> response time. > > There is a case where this might not actually give you what you are > looking for -- which sounds essentially like the amount of time the > server spent processing that request. > > If StandardWrapperValve only times how long invoke() takes and (and > I haven't read the code, so I'm not sure) some component in Tomcat > executes *after* invoke() completes for the purposes of flushing > any buffered data back to the client, then "Processing Time" may be > off by the amount of time it takes Tomcat to flush those buffers > back to the client. If you have big buffers or slow clients, this > could add up quickly. > > -chris > > Thanks for the reply. I've done some further digging into the > Application List Startup Time. Here is one example from the Tomcat > Manager - > > localhost/account-information-bs-1.1##v1.1.1 Start time: Fri Jan 22 > 13:26:17 GMT 2016 Startup time: 33 ms TLD scan time: 0 ms > > When the startup time is compared back to the catalina.out log for > the same webapp, the time is dramatically more (307,324 ms) as seen > here - > > 22-Jan-2016 13:26:17.204 INFO [localhost-startStop-15] > org.apache.catalina.startup.HostConfig.deployWAR Deployment of web > application archive > /opt/tomcat/webapps/account-information-bs-1.1##v1.1.1.war has > finished in 307,324 ms > > Any ideas why such a difference exists? The above is the time it takes to deploy the application, not the time it takes to service a request (or a whole bunch of requests over a period of time). Maybe I don't understand your question? - -chris -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlamr9YACgkQ9CaO5/Lv0PAWvQCeJKCPfuDt8NQo6wMHE31C4CXO Fv4AoKy2REEfUU2YSBpKL28a8RsbhcoX =s4au -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
