[CASSANDRA-13496] table with lots of column ( tens of thousands columns), system is very slow

• Type: Bug
• Status: Resolved
• Priority: Low
• Resolution: Won't Fix
• Component/s: Legacy/CQL
• Labels: usability

Environment

linux redhat 6.5 cassandra 3.10 using 2i
cpu : 4 core , memory: 16G . 5 servers
using gocql client

• Severity: Low
• Assignee: Unassigned
• Reporter: lizg
• Created: 05/May/17 02:54
• Updated: 16/Apr/19 09:30
• Resolved: 27/Aug/17 19:33

Description

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- Segment CommitLogSegment(/home/matrix/cassandra/commitlog/CommitLog-6-1493809341337.log) is no longer active and will be deleted now