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https://issues.apache.org/jira/browse/OFBIZ-4282?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jacques Le Roux closed OFBIZ-4282.
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       Resolution: Fixed
    Fix Version/s: SVN trunk

Thanks Philippe, David,

Philippe, yes it was a good idea to create sub-tasks. In such case just avoid 
to put same change in both/more patches (internalBegin in 4293 ;o)
                
> TransactionUtil performance optimisations
> -----------------------------------------
>
>                 Key: OFBIZ-4282
>                 URL: https://issues.apache.org/jira/browse/OFBIZ-4282
>             Project: OFBiz
>          Issue Type: Improvement
>          Components: framework
>    Affects Versions: SVN trunk
>            Reporter: Philippe Mouawad
>            Assignee: Jacques Le Roux
>              Labels: PERFORMANCE
>             Fix For: SVN trunk
>
>
> Hello,
> Reviewing TransactionUtil code, I have seen 2 problems:
> - internalBegin is uselessly synchronized , since it is a static method it is 
> a very big useless Contention Point since not unthread safe instance variable 
> is used 
> - debugResources is true which creates a DebugXAResource (that creates an 
> Exception) , it should be false and made an option for debuging
> These 2 modifications have been in our production for a while and we noticed 
> CPU reduction and no more contention on TransactionUtil#begin
> Regards
> Philippe Mouawad
> http://www.ubik-ingenierie.com

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