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Anastasia Braginsky commented on HBASE-20234: --------------------------------------------- [~stack], I can take care for this issue. There are currently no per-store counters that I have described (number of in-memory-flushes, number of saved bytes), nor that they make it up to region-level. No problem to add them. I have taken a look on the Region's Metrics design. It looks like the notion of Histogram (MetricHistogram) we can use well for in-memory-flushes history, saved bytes history. However, MetricsRegionServer's method updateFlush() appears to be invoked once in a while upon organized flush-to-disk. As in-memory-flush is an asynchronous event (appearing from time to time on different stores), we will need to keep some new per-region periodic task to collect the per-store counters and transfer them to the Metrics. Alternatively we can coordinate the collection of the in-memory-flush counters to the flush-to-disk update, that already exists in the code. I am not sure it is good to bind those events. Any alternative ideas? > Expose in-memory compaction metrics > ----------------------------------- > > Key: HBASE-20234 > URL: https://issues.apache.org/jira/browse/HBASE-20234 > Project: HBase > Issue Type: Sub-task > Reporter: stack > Assignee: Anastasia Braginsky > Priority: Major > > Hard to glean insight from how well in-memory compaction is doing currently. > It dumps stats into the logs but better if they were available to a > dashboard. This issue is about exposing a couple of helpful counts. There are > already by-region metrics. We can add a few for in-memory compaction (Help me > out [~anastas]... what counts would be best to expose). > Flush related metrics include.... > {code} > Namespace_default_table_tsdb-tree_region_cfbf23e7330a1a2bbde031f9583d3415_metric_flushesQueuedCount: > { > description: "Number flushes requested/queued for this region", > value: 0 > { > description: "The number of cells flushed to disk", > value: 0 > }, > { > description: "The total amount of data flushed to disk, in bytes", > value: 0 > }, > ... > {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005)