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https://issues.apache.org/jira/browse/HBASE-13876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14580173#comment-14580173
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Hadoop QA commented on HBASE-13876:
-----------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12738758/HBASE-13876-v2.patch
against master branch at commit 4713fc6407450825b1907c833ca60d0cc604b5be.
ATTACHMENT ID: 12738758
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 3 new
or modified tests.
{color:red}-1 javac{color}. The patch appears to cause mvn compile goal to
fail with Hadoop version 2.4.1.
Compilation errors resume:
[ERROR] COMPILATION ERROR :
[ERROR]
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java:[1381,41]
method create in class org.apache.hadoop.hbase.regionserver.HeapMemoryManager
cannot be applied to given types;
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-compiler-plugin:3.2:compile (default-compile) on
project hbase-server: Compilation failure
[ERROR]
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java:[1381,41]
method create in class org.apache.hadoop.hbase.regionserver.HeapMemoryManager
cannot be applied to given types;
[ERROR] required:
org.apache.hadoop.conf.Configuration,org.apache.hadoop.hbase.regionserver.FlushRequester,org.apache.hadoop.hbase.Server,org.apache.hadoop.hbase.regionserver.RegionServerAccounting
[ERROR] found:
org.apache.hadoop.conf.Configuration,org.apache.hadoop.hbase.regionserver.MemStoreFlusher,org.apache.hadoop.hbase.regionserver.HRegionServer
[ERROR] reason: actual and formal argument lists differ in length
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e
switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please
read the following articles:
[ERROR] [Help 1]
http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf :hbase-server
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/14362//console
This message is automatically generated.
> Improving performance of HeapMemoryManager
> ------------------------------------------
>
> Key: HBASE-13876
> URL: https://issues.apache.org/jira/browse/HBASE-13876
> Project: HBase
> Issue Type: Improvement
> Components: hbase, regionserver
> Affects Versions: 2.0.0, 1.0.1, 1.1.0, 1.1.1
> Reporter: Abhilash
> Assignee: Abhilash
> Priority: Minor
> Attachments: HBASE-13876-v1.patch, HBASE-13876-v2.patch,
> HBASE-13876.patch
>
>
> I am trying to improve the performance of DefaultHeapMemoryTuner by
> introducing some more checks. The current checks under which the
> DefaultHeapMemoryTuner works are very rare so I am trying to weaken these
> checks to improve its performance.
> Check current memstore size and current block cache size. If we are using
> less than 50% of currently available block cache size we say block cache is
> sufficient and same for memstore. This check will be very effective when
> server is either load heavy or write heavy. Earlier version just waited for
> number of evictions / number of flushes to be zero which are very rare.
> Otherwise based on percent change in number of cache misses and number of
> flushes we increase / decrease memory provided for caching / memstore. After
> doing so, on next call of HeapMemoryTuner we verify that last change has
> indeed decreased number of evictions / flush ( combined). I am doing this
> analysis by comparing percent change (which is basically nothing but
> normalized derivative) of number of evictions and number of flushes during
> last two periods. The main motive for doing this was that if we have random
> reads then we will be having a lot of cache misses. But even after increasing
> block cache we wont be able to decrease number of cache misses and we will
> revert back and eventually we will not waste memory on block caches. This
> will also help us ignore random short term spikes in reads / writes.
>
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