[rules-users] time loading rules into knowledgebase giving different results when using mvel2-beta6 versus mvel2-drools4 jars

[vadlam]

we have some interesting findings with loading rules PKG into  knowledgebase
when using mvel2-beta6 jar versus mvel2-drools4 jar.

the PKG file was built in Guvnor 5.3.0.Final which uses mvel2-drools4 jar.

when we loaded this PKG file using Drools 5.3 jars and using  mvel2-drools4
jar, we were getting OOM errors at around 1 GB .it would also take a very
long time to throw the error.

when we loaded this PKG file using Drools 5.3 jars and using  mvel2-beta6
jar, we were able to load the package successfully in a lesser time and no
OOM errors at the same heap size.

Has anyone come across this issue?


is it advised/recommended to substitute mvel2-drools4 jar with mvel2-beta6
jar in our service code when loading the rules package as well as executing
the rules at runtime?

or, is there a specific reason for Guvnor 5..3 using mvel2-drools4 jar( such
as customized optimizations) instead of just mvel2 beta jars ?



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