DO NOT REPLY [Bug 27143] New: - provide a "low in memory" concept

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=27143

provide a "low in memory" concept

           Summary: provide a "low in memory" concept
           Product: Tomcat 4
           Version: 4.1.27
          Platform: Other
               URL: http://jakarta.apache.org/tomcat/faq/memory.html
        OS/Version: Other
            Status: NEW
          Severity: Enhancement
          Priority: Other
         Component: Catalina
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: hauser@acm.org


reading the FAQ, tomcat users appear to be quite "blind flying" when it comes to
memory management. In my web application, I am trying to move really large files
through to mysql (45MB and alike - see http://bugs.mysql.com/?id=2916 for more).

Under such circumstances, it is not so surprising that out-of-memory situations
can occur. In order to make such an application more predictable, it would be
great to be able to manage this more proactively.

Suggestion:
===========
it would be great if there was a call-back from tomcat warning me if remaining
space gets below a configurable level. This way, the application could iterate
through the current sessions and for example kick-out the ones with the longest
idle time until a traget free memory level is available again or it could throw
out objects hanging in such sessions that are larger than say 4 MB, etc...

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