cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CASSANDRA-9744) unrealistic pending compactions displayed
Date Tue, 07 Jul 2015 18:13:04 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-9744?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis resolved CASSANDRA-9744.
---------------------------------------
    Resolution: Duplicate

> 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.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message