On 23/08/17 21:17, Christopher Schultz wrote: > To whom it may concern, > > On 8/22/17 10:28 PM, ophusky wrote: >> Server version: Apache Tomcat/8.0.35 Server built: May 11 2016 >> 21:57:08 UTC Server number: 8.0.35.0 OS Name: Linux OS >> Version: 3.2.35 Architecture: amd64 JVM Version: >> 1.8.0_45-b14 JVM Vendor: Oracle Corporation > > Thanks! > >> 1. [root@app41 manager]# curl -s http://127.0.0.1/manager/status >> |grep -P -o 'Max threads:.*?<br> ' Max threads: 700 Current thread >> count: 478 Current thread busy: 17 Keeped alive sockets count: >> 5<br> 2. [root@app41 manager]# pgrep jsvc 25446 25447 [root@app41 >> manager]# ps -Lf 25447 | wc -l 541 > > Okay. > >> I want to figure out the meaning of "Current thread count" >> "Current thread busy" "Keeped alive sockets count" and relationship >> between 1 and 2. > > Max threads >= current thread count > Current thread count >= current thread busy > Current thread count >= Keeped alive sockets count
That is true for BIO, but not for any of the other connections which are all non-blocking between requests. With those connectors you can have up to maxConnections open sockets in HTTP keep-alive waiting for data to arrive. Mark > >> I have read the document >> http://tomcat.apache.org/tomcat-8.0-doc/manager-howto.html#Server_Stat > us >> if "Current thread busy" mean "Parse and Prepare Request" and >> "Service" > > Also "Finishing" > > ? "Keeped alive sockets count" mean "Keep-Alive"? > > Yes. > > One question you didn't ask, but shows data for was "why does my > process have 541 threads when Tomcat says it's got 478 threads". The > answer is that Tomcat and the JVM are both running threads that are > not servicing requests. > > Take a thread dump of your JVM to see what those other threads are > doing, and you'll see things like the "Finalizer" thread, various > threads for GC, JIT, AWT (if graphics subsystem has been launched), > the main thread itself, etc. > > -chris > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
