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From Christopher Schultz <>
Subject Re: Performance degrades on tomcat7 for the same runs of a sample performance 60 user test
Date Wed, 04 Nov 2015 20:01:39 GMT

On 11/3/15 11:24 PM, dimple ranka wrote:
> Also forgot to mention that setting maxKeepAliveRequests to -1 did not
> help. As expected from the connector documentation the default value for
> this attribute is 100 and we have a 60 user test set up.
> On Wed, Nov 4, 2015 at 8:18 AM, dimple ranka <> wrote:
>> Hi Mark,
>> Another observation to be noted here is that system CPU usage shoots up
>> for subsequent runs, especially for later runs.
>> We have been looking into this issue for couple of weeks now and it is
>> clear in the same environment with the same setup it doesn't reproduce on
>> tomcat6. The moment we deploy the web application in a tomcat7 container
>> the slowness with subsequent runs shows up.

Can you take some thread dumps to find out what Tomcat is doing? High
CPU usage and lower request throughput sounds like a Poller problem
since you are using NIO.


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