Understanding Virtual Rules Table

Introduced with Pega 7, virtual rules table (VTable) mode of caching has advantages over the alternative caching approaches such as rules assembly cache or application based assembly. Both remain available and supported.

Applications in Pega 7 can operate in one of three caching modes:

• VTable (default).
• Application Based Assembly, equivalent to normal operations in PRPC V6.3SP1 and earlier V6.3 versions.
• Rules Assembly Cache, equivalent to normal operations in version PRPC V6.2SP2 and earlier versions.

Note: As a best practice for performance, your applications should employ the VTable for all applications.

Note that some rules have not yet been converted to VTable and still use ABA, such as Streams(Harness/Section/Control).

VTable mode

An application operates in VTable mode with no prconfig.xml setting for fua/assemblyCacheMode.

Concepts

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