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https://issues.apache.org/jira/browse/HBASE-9037?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13719101#comment-13719101
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Lars Hofhansl commented on HBASE-9037:
--------------------------------------
So a couple of questions:
# This happened with a fairly small cache (~200mb). And it evicts the
difference between this.maxSize * this.acceptableFactor and this.maxSize *
this.minFactor. In this case this would be 10% of 200mb = 20mb. So each 20mb of
new cached data we'd see an eviction run.
This difference is larger with a larger cache, so we would see fewer of these
messages.
# Should we increase the default differences between min_factor (0.75) and
max_factor (0.85)?
# Does anyone want to see these messages at all?
# Should we just trace these?
> LruBlockCache is too verbose at Debug level
> -------------------------------------------
>
> Key: HBASE-9037
> URL: https://issues.apache.org/jira/browse/HBASE-9037
> Project: HBase
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Fix For: 0.94.10
>
>
> From Stack on the mailing list:
> {quote}
> I see this every 4ms or so when reading.
> 21 2013-07-24 10:55:24,594 DEBUG
> org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction
> completed; freed=24.78 MB, total=185.13 MB, single=0 KB, multi=207.88 MB,
> memory=0.64 KB
> 20 2013-07-24 10:55:28,975 DEBUG
> org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction
> started; Attempting to free 24.75 MB of total=209.91 MB
> Loads of it.
> {quote}
> Should either limit the log frequency of this, or change to trace.
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