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From "Shapira, Yoav" <>
Subject RE: tomcat poll()'ing too much ?
Date Thu, 29 Aug 2002 13:25:07 GMT
That's very interesting.  We've been using tomcat for a couple of years
now in production, on Solaris servers the whole time.  Been using tomcat
version 3.1.x through 4.1.x.  Been using JDK 1.2.2 through 1.4.1RC.
Been using Solaris 2.6 to 2.8.  

We've never had a tomcat CPU usage problem, and we analyze it on an
ongoing basis with top, truss, some in-house tools.  Not saying you
couldn't have one, but I'd be very curious whether your apps running on
tomcat do anything while "idle".

Yoav Shapira
Millennium ChemInformatics

>-----Original Message-----
>From: Matt Hallam []
>Sent: Thursday, August 29, 2002 5:11 AM
>Subject: tomcat poll()'ing too much ?
>We're currently running tomcat 4.0 on a Solaris 8 machine, and i've
>that even when sitting idle (ie not serving any requests) it is still
>consuming quite a high amount of CPU time (70 to 80%). truss'ing the
>process reveals that it's making an awful lot of poll() system calls
>presumably polling the socket waiting for a connection.
>Ive just fired up the lastest tomcat beta and it exhibits the same
>Is there anyway of slowing down its polling rate ?
>Thanks in advance
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