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https://issues.apache.org/jira/browse/KUDU-1688?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15664422#comment-15664422
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Alexey Serbin commented on KUDU-1688:
-------------------------------------
Temporary fix (increased level for verbose log messages):
http://gerrit.cloudera.org:8080/5067
> Impala 'INSERT IGNORE' is slow due to VLOG(1) logging in client
> ---------------------------------------------------------------
>
> Key: KUDU-1688
> URL: https://issues.apache.org/jira/browse/KUDU-1688
> Project: Kudu
> Issue Type: Improvement
> Components: impala, perf
> Affects Versions: 1.0.0
> Reporter: Todd Lipcon
>
> Currently Batcher::ProcessWriteResponse will log a VLOG(1) entry for every
> row error it experiences. When using INSERT IGNORE in Impala, this can yield
> thousands of logs per second and makes it extremely slow.
> We should consider bumping this to a higher vlog level, or pushing the
> 'insert ignore' flag into the operations themselves (even before KUDU-1563 is
> finished we could just drop the errors inside the client side)
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