Resolution:
Description:
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TIBCO BusinessEvents 4.x, Caching, Chanels and Database Maintenance Questions.


Environment:
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TIBCO BusinessEvents
  

Resolution:
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1). Difference between L1Cache and working memory and it usage during RTC.

    Max Size (Local Cache)

    Specifies the maximum number of objects (entities) in each agent's
    L1Cache (inference agent) or local cache (query agent). The L1 cache is
    a local cache used by the inference agent for local access to recently
    used objects. It is used to optimize access to objects.

    The query local cache is used in a way similar to the inference agent
    L1Cache. The query agent's local cache stores cache data locally for
    efficient reuse. The local cache listens to and synchronizes the locally
    stored entity instances with those in the main cache, so that the local
    cache stays up-to-date.

    When the threshold is reached, oldest entities are removed first.
    Default is 1024 (unit is objects).


2).  Meaning of Entity property NumRetractedFromAgents.
  It is entities deleted through the RTC

  Similarly,
    NumAssertedFromAgents - Entities  asserted through the RTC
    NumModifiedFromAgents - Entities  Modified through the RTC

3). How the new Cache object handle by CE in case its memory utilization reached to threshold.    

  When the number of objects in cache reaches the cache size limit, some of the objects are automatically evicted from cache
  (Although, they are still in the backing store).
  
4). Input destination channel set up - On using worker thread model, 12 thread and 100 queue size. What does it mean?

  12 thread share some common internal queue which can store 100 Or Each thread can store 100 message to its internal queue?
  
  All 12 thread share some common internal queue which can store 100 message

    
References:
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For more details, refer to Administration Guide and Architect Guide.

TIBCO BusinessEvents 4.x, Caching, Chanels and Database Maintenance Questions.