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From Ty <ty733...@gmail.com>
Subject Re: Cannot upgrade past Tomcat 6 due to massive memory increase
Date Thu, 18 Feb 2016 16:12:01 GMT
> Are you able to build Tomcat 8.0.x from source to test locally or would
> you like me to provide you with a test build?

Looks like building is pretty straightforward.  I'll dive in and post back
with my testing results.

On Thu, Feb 18, 2016 at 9:11 AM Mark Thomas <markt@apache.org> wrote:

> Another update.
>
> Before any fixes, my tests showed a heap of ~1GB with ~30% used by
> WebappClassLoader and 50% by JarResourceSet
>
> The WebappClassLoader issue was triggered by JAR scanning. Disabling /
> limiting JAR scanning will reduce the impact of this issue.
> The issue has been fixed in 9.0.x and 8.0.x and will be included in
> 9.0.0.M4 and 8.0.33 onwards.
>
> The JarResourceSet issue was hard coded. There is no way to work around
> it. This has also been fixed in 9.0.x and 8.0.x and will be included in
> 9.0.0.M4 and 8.0.33 onwards.
>
> Regressions are possible but unlikely. All the unit tests pass and I
> have been using Atlassian Jira as a test app to check for changes in
> start time and as a smoke test. There is a small increase in start time
> with fix for the JarResourceSet issue (~5%) but the reduction in memory
> usage more than makes up for it.
>
> Are you able to build Tomcat 8.0.x from source to test locally or would
> you like me to provide you with a test build?
>
> Looking at the heap dump, there are still a few areas where it may be
> possible to reclaim more memory. This is on my TODO list and I hope to
> get to it before the next releases.
>
> Mark
>
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