-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 James,
On 2/1/17 3:59 PM, James H. H. Lampert wrote: > This is a long-shot, but . . . > > One of our customer installations is running slow, for no apparent > reason. For example, a very simple BIRT report running in our > webapp takes 6 seconds to run in this installation, whereas an > essentially identical one takes only one second on another > customer's installation. > > The one that's running slow is running under Tomcat 7.0.67, whereas > the one that's fast is running under 7.0.62. > > Is there anything that happened between those two releases that > could slow things down? Between two separate customers? I'm blame the underlying database, since that's where BIRT is doing most of its work. Slower hardware? More records? Thrashing in-memory caches? It could be anything. I'm not inclined to blame Tomcat. If you want to benchmark Tomcat, throughput is really the only thing you care about: the overhead that Tomcat adds to the "real work" you are trying to accomplish. If it really takes 6 seconds to get a completed response, run the report and take a few thread dumps during that time. It will let you know what the Java threads are doing. I suspect they will be waiting on data from the JDBC driver. - -chris -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJYkmAbAAoJEBzwKT+lPKRYqVoP/24hS/SDvYqJ2g+IfEw1JiRl kQMVD0Y1ck7Tj/16/H/RYtpj8+08LPh36LXslVklife2PXaU6PlsHwnHj6l/otHC Oe8+S+/GUcTVfrXSaPQgCSapFI/7Mzf59daJSrHKGlyTIj1SHWavlEL1A0cGKA9x I3qKlPsik6Tjz3KFZmZ74Nd6NiL+GWnrw5yVhrwZ1uryGxh0neHa9U+fS1ku9Ln0 sG+L18k66yleKCvokqDR5Brmpu3C2klws3IAjBd25aGMgFnWmJac+GvELQU6ISSs zF5jfaL5HhVzFBxqo1Fl7CEWhioJO9SiRWx+E1g+VBpsnO/t/rvvl9Q8nNAxmhNn 18JFUdC41ETH0hixM/CGZTTvS2Z7hxqsR2see3oQ1DviRynwsQsEC6VkXvA/F/cv qS4pfmQW+JGCVLvk/kE8M1Rnp1iIsNcqNTR9ipPbvFnjxfBntioIruzq1+qwRX8+ GzDRQRiTWt2Of6dqwN8oJrdMHm1QXbL+5kSD7hAH8zpiSJRSNccAc6sCwqY3/1mO JSGjomtyuT/MnECiUrUnPf/bUq+hQpi58tKLMYhmVIqsP8y0IYjluQIceZBYQYMY Jev2FoIcFtOL0HpD6c+kS60eDUQ5UyzD2v4/3lhaPM68l1gr1j8RafH8Y7/MRgHd GdiTOvy0bhWT1TS8A+1p =PHO1 -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
