[jira] [Created] (IMPALA-9816) Document about LocalCatalog flags

["Quanlong Huang (Jira)" <ji...@apache.org>]

Quanlong Huang created IMPALA-9816:
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             Summary: Document about LocalCatalog flags
                 Key: IMPALA-9816
                 URL: https://issues.apache.org/jira/browse/IMPALA-9816
             Project: IMPALA
          Issue Type: Sub-task
            Reporter: Quanlong Huang


We need to document about these flags: 
{code:java}
DEFINE_bool_hidden(use_local_catalog, false,
    "Use experimental implementation of a local catalog. If this is set, "
    "the catalog service is not used and does not need to be started.");
DEFINE_int32_hidden(local_catalog_cache_mb, -1,
    "If --use_local_catalog is enabled, configures the size of the catalog "
    "cache within each impalad. If this is set to -1, the cache is auto-"
    "configured to 60% of the configured Java heap size. Note that the Java "
    "heap size is distinct from and typically smaller than the overall "
    "Impala memory limit.");
DEFINE_int32_hidden(local_catalog_cache_expiration_s, 60 * 60,
    "If --use_local_catalog is enabled, configures the expiration time "
    "of the catalog cache within each impalad. Even if the configured "
    "cache capacity has not been reached, items are removed from the cache "
    "if they have not been accessed in this amount of time.");
DEFINE_int32_hidden(local_catalog_max_fetch_retries, 40,
    "If --use_local_catalog is enabled, configures the maximum number of times "
    "the frontend retries when fetching a metadata object from the impalad "
    "coordinator's local catalog cache."); {code}
[https://github.com/apache/impala/blob/052129c16a29891a72427b351bcc4e087d772fbe/be/src/runtime/exec-env.cc#L103-L120]

 



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