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From "Jeff Jirsa (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CASSANDRA-13496) table with lots of column ( tens of thousands columns), system is very slow
Date Sun, 27 Aug 2017 19:34:00 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-13496?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jeff Jirsa resolved CASSANDRA-13496.
------------------------------------
    Resolution: Won't Fix

As mentioned, this is unlikely to be fixed anytime soon, as is really a case where a new data
model should be considered. Without any further quantification, closing as wont-fix.


> table with lots of column ( tens of thousands columns), system is very slow 
> ----------------------------------------------------------------------------
>
>                 Key: CASSANDRA-13496
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13496
>             Project: Cassandra
>          Issue Type: Bug
>          Components: CQL
>         Environment: linux redhat 6.5 cassandra 3.10 using 2i
> cpu : 4 core , memory: 16G  . 5 servers
> using gocql client
>            Reporter: lizg
>            Priority: Minor
>              Labels: usability
>         Attachments: debug.log, sql.txt
>
>
> In debug.log there are lots of 
> DEBUG [COMMIT-LOG-ALLOCATOR] 2017-05-04 08:54:35,769 AbstractCommitLogSegmentManager.java:107
- No segments in reserve; creating a fresh one
> DEBUG [MemtablePostFlush:54] 2017-05-04 08:49:19,699 AbstractCommitLogSegmentManager.java:329
- Segment CommitLogSegment(/home/matrix/cassandra/commitlog/CommitLog-6-1493809341337.log)
is no longer active and will be deleted now



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