[jira] [Commented] (CASSANDRA-10055) High CPU load for Cassandra 2.1.8

["vijay (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-10055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14727979#comment-14727979 ] 

vijay commented on CASSANDRA-10055:
-----------------------------------

HI, Benedict controlling the number of coreConnPerHostLocal and maxConnPerHostLocal helped in cpu load issue we are facing.

> High CPU load for Cassandra 2.1.8
> ---------------------------------
>
>                 Key: CASSANDRA-10055
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10055
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Config
>         Environment: Prod
>            Reporter: vijay
>              Labels: triaged
>             Fix For: 2.1.x
>
>         Attachments: dstst-lcdn.log, dstst-lcdn2.log, dstst-lcdn3.log, dstst-lcdn4.log, dstst-lcdn5.log, dstst-lcdn6.log, js.log, js2.log, js3.log, js4.log, js5.log, js6.log, top-bHn1-2.log, top-bHn1-3.log, top-bHn1-4.log, top-bHn1-5.log, top-bHn1-6.log, top-bHn1.log
>
>
> We are seeing High CPU Load about 80% to 100% in Cassandra 2.1.8 when doing Data ingest, we did not had this issue in 2.0.x version of Cassandra
> we tested this in different Cloud platforms and results are same.
> CPU: Tested with M3 2xlarge AWS instances
> Ingest rate: Injecting 1 million Inserts each insert is of 1000bytes
> no other Operations are happening except inserts in Cassandra
> let me know if more info is needed.



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