[jira] [Created] (IMPALA-12402) Add some configurations for CatalogMetaProvider's cache_

["Maxwell Guo (Jira)" <ji...@apache.org>]

Maxwell Guo created IMPALA-12402:
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             Summary: Add some configurations for CatalogMetaProvider's cache_
                 Key: IMPALA-12402
                 URL: https://issues.apache.org/jira/browse/IMPALA-12402
             Project: IMPALA
          Issue Type: Improvement
          Components: fe
            Reporter: Maxwell Guo


when the cluster contains many db and tables such as if there are more than 100000 tables, and if we restart the impalad , the local cache_ CatalogMetaProvider's need to doing some loading process. 
As we know that the goole's guava cache 's concurrencyLevel os set to 4 by default. 
but if there is many tables the loading process will need more time and increase the probability of lock contention, see [here|https://github.com/google/guava/blob/master/guava/src/com/google/common/cache/CacheBuilder.java#L437]. 
So we propose to add some configurations here, the first is the concurrency of cache.



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