-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Phineas,
On 7/24/12 7:19 PM, Phineas Dole wrote: > Test configuration: <Connector port="8080" > protocol="org.apache.coyote.http11.Http11NioProtocol" > acceptCount="10240" numThreads="1024" numThreads is not a recognized configuration attribute. Read the docs: http://tomcat.apache.org/tomcat-7.0-doc/config/http.html > I have increased somaxconn. Are you sure? > The error has become very consistent. I can trigger it by > restarting tomcat and then running the test. Typically it takes <5s > for ab to terminate. (Though ab states that several thousand > requests have completed by that point, which appears true from the > access logs). With a trivial servlet, you should be able to handle a *lot* of load. Are you testing on localhost (i.e. both ab and Tomcat run on the same machine)? > The high (10240) acceptCount seems to be the reason for the > consistent error. Decreasing it seems to make things more stable. In general, I would expect that. There's not a really good reason for a high acceptCount. If your machine can't handle a huge amount of load, don't make a whole bunch of clients get in a huge line: just refuse their connections. > In fact, setting acceptCount="5" and connectionTimeout="-1" seems > to delay the error by a huge amount, but it still occurs. Also, > the connectionTimeout resolves "length" and "exception" errors > occasionally reported by ab. I presume this is related more to how > the client (ab) operates and not tomcat itself. Perhaps. If it's appropriate for your testing, try using "-k" to enable HTTP keepalive to see if you get better throughput (and fewer errors). > The acceptCount is counter-intuitive to me. Was this the intended > solution you had in mind. No: I think you should change maxThreads. Better yet, use an <Executor> so you have better control over everything. TC7 always uses an <Executor> implicitly, but there are fewer configuration options when doing it through the <Connector>. - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.17 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAlAQEn4ACgkQ9CaO5/Lv0PA1RACgpOoW6lPrO4vEDA8/kMnKFtKk 7QoAnA7G7uz2wD2YmoLmuHUKA3sp4W3l =RCwk -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
