[jira] [Created] (IMPALA-13331) Add metrics to CatalogdTableInvalidator

["Csaba Ringhofer (Jira)" <ji...@apache.org>]

Csaba Ringhofer created IMPALA-13331:
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             Summary: Add metrics to CatalogdTableInvalidator
                 Key: IMPALA-13331
                 URL: https://issues.apache.org/jira/browse/IMPALA-13331
             Project: IMPALA
          Issue Type: Improvement
          Components: Catalog
            Reporter: Csaba Ringhofer


CatalogdTableInvalidator only  logs when it invalidates a table but there are no metrics to track the number of invalidations. This makes it hard to get a picture of the effects of invalidate_tables_timeout_s /invalidate_tables_gc_old_gen_full_threshold.

A few examples for useful metrics:
- number of times invalidateSome() was called
- number of table invalidations due to mem pressure
- number of table invalidations due to ttl
- time spent in invalidateSome()
- time spent in invalidateOlderThan()

for the number of invalidations/time spent metrics probably having separate sum/max/avg metrics would be nice 




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