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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-8606) DB performance impacted due to VM sync.
Date Thu, 02 Jul 2015 19:34:04 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-8606?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14612409#comment-14612409
] 

ASF GitHub Bot commented on CLOUDSTACK-8606:
--------------------------------------------

Github user remibergsma commented on the pull request:

    https://github.com/apache/cloudstack/pull/553#issuecomment-118141634
  
    @wilderrodrigues Could you please have a look at this PR?


> DB performance impacted due to VM sync.
> ---------------------------------------
>
>                 Key: CLOUDSTACK-8606
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-8606
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: Management Server, Upgrade
>    Affects Versions: 4.5.0
>            Reporter: Koushik Das
>            Assignee: Koushik Das
>             Fix For: 4.6.0
>
>
> VM sync. generates a lot of queries on vm_instance table with 'instance_name' as filter.
Since the field is not
> indexed, these kind of queries will impact DB performance.
> The issue is visible with deployments having more than 4000 VMs. VM sync. runs every
'ping.interval' and in each run generates individual queries for all VMs. If the MS is left
running for a few hours, its response deteriorates drastically. 



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