Karen Smoler Miller created GEODE-5347:
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             Summary: create a gfsh command to print specified statistics
                 Key: GEODE-5347
                 URL: https://issues.apache.org/jira/browse/GEODE-5347
             Project: Geode
          Issue Type: New Feature
          Components: docs, gfsh
            Reporter: Karen Smoler Miller


I would find it useful for interactive monitoring and debugging to be able to 
issue a gfsh command that prints the current value of a statistic.  Currently, 
some statistics are available with the gfsh show metrics command, but not all.  
And I don't want to have to use the API to capture a value that I need while 
I'm trying to interactively debug a cluster.

The particular case/statistic I want to see is GatewayStatistics 
eventQueueSize, which doesn't appear to be accessible by using gfsh show 
metrics command.  My use case has to do with migrating data from one cluster to 
another.  I want to enable a gateway sender that will "push" my region entries 
to the other cluster as entries are touched.  But, once I've completed touching 
each entry to be migrated, I need to know that sender's queue has emptied to be 
able to call my migration complete.



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