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https://issues.apache.org/jira/browse/CASSANDRA-9578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14877433#comment-14877433
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pankaj mishra commented on CASSANDRA-9578:
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Earlier we used san as our cassandra data storage but since we changed our
storage to ssd problem went away.
We are still using Cassandra server version 2.0.14
> CPU hogging by cassandra while starting.
> ----------------------------------------
>
> Key: CASSANDRA-9578
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9578
> Project: Cassandra
> Issue Type: Bug
> Reporter: pankaj mishra
>
> The problem we experience is that just after starting cassandra, the cpu
> utilization by java program (cassandra service) increases insanely (100-300%)
> and cassandra server startup process gets delayed forever. It does not
> happen every time we start. Many a times it starts just fine.
> We also observed that while cluster is running fine with every node is in UN
> mode, after one or two days (time period is not fixed) few nodes goes into DN
> mode in nodetool status on their own, even though we are not reading any data
> or even writing any data.
> We just wanted to know that is there any corner case bug in cassandra that
> might be the reason for this kind of behavior?
> The version of cassandra server along with all environment information is
> given below.
> Cassandra server version 2.0.14
> JDK version
> java version "1.8.0_45"
> Java(TM) SE Runtime Environment (build 1.8.0_45-b14)
> Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)
> unama -a
> Linux 2.6.32-504.16.2.el6.x86_64 #1 SMP Wed Apr 22 06:48:29 UTC 2015 x86_64
> x86_64 x86_64 GNU/Linux
> blockdev --getra /dev/sdb1 (cassandra data directory)
> 128
> blockdev --getra /dev/sda2 (cassandra commitlog directory)
> 128
> lbs_release -a
> LSB Version:
> :base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch
> Distributor ID: CentOS
> Description: CentOS release 6.6 (Final)
> Release: 6.6
> Codename: Final
>
> We are using following version of cassandra on vm with following version of
> os.
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