Christophe created CASSANDRA-9744:
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Summary: unrealistic pending compactions displayed
Key: CASSANDRA-9744
URL: https://issues.apache.org/jira/browse/CASSANDRA-9744
Project: Cassandra
Issue Type: Bug
Reporter: Christophe
Attachments: compact.png
Hi there,
I am on 2.1.7. I am using DateTieredCompactionStrategy with the following
parameters:
min_threshold 16
max_threshold 16
base_time_seconds 300
max_stable_age_days 0.05
Apart from that, nothing exotic. I dump an sstable of about 18M every 12 sec I
would say.
Maybe 1 hour after creating my cluster, I can see that:
1. the number of SSTables has constantly been below 60.
2. Most of the time, I have between 1 and 4 pending compaction.
3. I occasionaly have a large number of pending compactions (30-40) for a short
period of time (a few min)
4. I witness on 1 node 1610 pending compaction, on another node 367 pending
compaction, for a short period of time (a few min)
Item 4 makes me thing there is a bug as I don't see how I can have that many
pending compaction with less than 50 sstable.
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