[CASSANDRA-16123] Use materialized view, CPU usage over 100%

• Type: Improvement
• Status: Triage Needed
• Priority: Normal
• Resolution: Unresolved
• Component/s: Legacy/Core
• Platform: All
• Assignee: Unassigned
• Reporter: chenbing
• Created: 12/Sep/20 09:02
• Updated: 12/Sep/20 17:22

Description

env info:

os: CentOS Linux release 7.4.1708

cassandra: apache-cassandra-3.11.8

jdk:1.8.0_261

 

I used materialized view,but the cpu use over 100 when not cql client request, 

My analysis process is as follows:

1. top

 find pid is:25640

2. top -pH 25640

3. printf "%x\n" 26065

convert  threadid 26065 ,hex value is :65d1

4.jstack -l 26065 > jstack_25640.txt

find 65d1 ind jstask_25640.txt

 

5.find in source code on org.apache.cassandra.db.Keyspace.applyInternal,line 545

I guess used cpu over 100% caused by a loop call Keyspace.applyInternal.

 

Everybody have any suggessted?

The jstack_25640.txt file on Attachment.