[
https://issues.apache.org/jira/browse/SOLR-6136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14106898#comment-14106898
]
Timothy Potter commented on SOLR-6136:
--------------------------------------
ugh ... weird though as the notifyAll call that would free up the hang at that
spot is in a finally block you'd think it would be getting called correctly ...
the only path I can see that notify wouldn't get called is the queue never
empties.
> ConcurrentUpdateSolrServer includes a Spin Lock
> -----------------------------------------------
>
> Key: SOLR-6136
> URL: https://issues.apache.org/jira/browse/SOLR-6136
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Affects Versions: 4.6, 4.6.1, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
> Reporter: Brandon Chapman
> Assignee: Timothy Potter
> Priority: Critical
> Fix For: 5.0, 4.10
>
> Attachments: SOLR-6136.patch, wait___notify_all.patch
>
>
> ConcurrentUpdateSolrServer.blockUntilFinished() includes a Spin Lock. This
> causes an extremely high amount of CPU to be used on the Cloud Leader during
> indexing.
> Here is a summary of our system testing.
> Importing data on Solr4.5.0:
> Throughput gets as high as 240 documents per second.
> [tomcat@solr-stg01 logs]$ uptime
> 09:53:50 up 310 days, 23:52, 1 user, load average: 3.33, 3.72, 5.43
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 9547 tomcat 21 0 6850m 1.2g 16m S 86.2 5.0 1:48.81 java
> Importing data on Solr4.7.0 with no replicas:
> Throughput peaks at 350 documents per second.
> [tomcat@solr-stg01 logs]$ uptime
> 10:03:44 up 311 days, 2 min, 1 user, load average: 4.57, 2.55, 4.18
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 9728 tomcat 23 0 6859m 2.2g 28m S 62.3 9.0 2:20.20 java
> Importing data on Solr4.7.0 with replicas:
> Throughput peaks at 30 documents per second because the Solr machine is out
> of CPU.
> [tomcat@solr-stg01 logs]$ uptime
> 09:40:04 up 310 days, 23:38, 1 user, load average: 30.54, 12.39, 4.79
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 9190 tomcat 17 0 7005m 397m 15m S 198.5 1.6 7:14.87 java
--
This message was sent by Atlassian JIRA
(v6.2#6252)
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org
For additional commands, e-mail: dev-h...@lucene.apache.org
