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From "Nikolai Grigoriev (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-7957) improve active/pending compaction monitoring
Date Wed, 02 Mar 2016 15:57:18 GMT


Nikolai Grigoriev commented on CASSANDRA-7957:

I was talking specifically about the *current* status. That's why I mentioned "nodetool compactionstats".
I think that in case of Leveled Compaction we could expose a bit more data to make nodetool
more informative.

Here is the use case. I look at "nodetool compactionstats" and I see that my compaction process
is doing almost nothing, like doing one compaction. At the same time, I see hundreds of pending
compactions. What I was asking for is the additional information that shows what is in that
list of pending compactions and what is blocked by what. I do not think that with the default
log settings you can get this info today easily.

If you look at CASSANDRA-7949 you will probably better understand why I was looking for this

> improve active/pending compaction monitoring
> --------------------------------------------
>                 Key: CASSANDRA-7957
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>            Reporter: Nikolai Grigoriev
>            Priority: Minor
> I think it might be useful to create a way to see what sstables are being compacted into
what new sstable. Something like an extension of "nodetool compactionstats". I think it would
be easier with this feature to troubleshoot and understand how compactions are happening on
your data. Not sure how it is useful in everyday life but I could use such a feature when
dealing with CASSANDRA-7949.

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