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03a2ffc145
Add functions in CatalogUsageMonitor to monitor and report the catalog usage of the tables have the longest metadata loading time(Including maximum, median, 75th-ile, 95th-ile, 99th-ile time). Set default tables loading metrics capacity to 100. However, there might be a problem here because we only keep the capacity size to 100. For example, there might be case like a table has higher median loading time but has lower Maximum loading time which cannot make itself to the Top-100. For now, we will ignore case like that because we are aiming to find the tables with maximum longest loading time. Add the sorted table in Catalog server web-ui. The loading time is sorted by the maximum from load_duration metrics. But users can sort by other metrics in catalogd debug UI. Testing: - Add end-to-end test for webpage to verify the label and text exist in catalog debug page. Verify all fields are in JSON response - Launch Impala and activate some tables to see the table loading time shown successfully on the catalog debug UI page. Change-Id: I9305a867d7053cde9acc42dae6e47ee440f1a8bf Reviewed-on: http://gerrit.cloudera.org:8080/14600 Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com> Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>