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From "lizg (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-13496) table with lots of column ( tens of thousands columns), system is very slow
Date Fri, 05 May 2017 02:55:04 GMT
lizg created CASSANDRA-13496:
--------------------------------

             Summary: 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
         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is no longer active and will be deleted now



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