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From "Pid *" <...@pidster.com>
Subject Re: increase in file descriptor use from Tomcat 7.0.21 to 7.0.23
Date Tue, 29 Nov 2011 08:35:18 GMT
On 29 Nov 2011, at 01:05, Mike Wertheim <mw@hyperreal.org> wrote:

> I have a web app that has been running on Tomcat 7.0.21 with APR 1.4.2
> and Tomcat Native 1.1.20 on 64-bit Java 1.6.0.23 on CentOS Linux.
>
> I upgraded half of my servers to Tomcat 7.0.23 and left the other half
> at 7.0.21.  I copied the modified server.xml, context.xml and web.xml
> files from the 7.0.21 directories to the 7.0.23 directories, so the
> configurations are identical.
>
> The 7.0.21 servers have on average about 10000 file descriptors open.
> The 7.0.23 servers have on average about 15000 file descriptors open.
> These numbers are what I get from running this shell command: ls -l
> /proc/[pid]/fd | wc -l
>
> All of the servers are getting about the same amount of traffic.  The
> only difference is the Tomcat version.
>
> Can anyone explain why Tomcat 7.0.23 would have 50% more file descriptors open?

Can you tell what they are opened on?

What is the number of active connections to those servers?


p

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